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Toilets and race conditions!
A co-worker asked me what issues multi-threading and shared memory can have. So I explained him that stuff with the lock. He wasn't quite sure whether he got it.
Me: imagine you go to the toilet. You check whether there's enough toilet paper in the stall, and it is. BUT now someone else comes in, does business and uses up all paper. CPUs can do shit very fast, can't they? Yeah and now you're sitting on the bowl, and BAMM out of paper. This wouldn't have happened if you had locked the stall, right?
Him: yeah. And with a single thread?
Me: well if you're alone at home in your appartment, there's no reason to lock the door because there's nobody to interfere.
Him: ah, I see. And if I have two threads, but no shared memory, then it is as if my wife and me are at home with each a toilet of our own, then we don't need to lock either.
Me: exactly!12 -
So this was a couple years ago now. Aside from doing software development, I also do nearly all the other IT related stuff for the company, as well as specialize in the installation and implementation of electrical data acquisition systems - primarily amperage and voltage meters. I also wrote the software that communicates with this equipment and monitors the incoming and outgoing voltage and current and alerts various people if there's a problem.
Anyway, all of this equipment is installed into a trailer that goes onto a semi-truck as it's a portable power distribution system.
One time, the computer in one of these systems (we'll call it system 5) had gotten fried and needed replaced. It was a very busy week for me, so I had pulled the fried computer out without immediately replacing it with a working system. A few days later, system 5 leaves to go work on one of our biggest shows of the year - the Academy Awards. We make well over a million dollars from just this one show.
Come the morning of show day, the CEO of the company is in system 5 (it was on a Sunday, my day off) and went to set up the data acquisition software to get the system ready to go, and finds there is no computer. I promptly get a phone call with lots of swearing and threats to my job. Let me tell you, I was sweating bullets.
After the phone call, I decided I needed to try and save my job. The CEO hadn't told me to do anything, but I went to work, grabbed an old Windows XP laptop that was gathering dust and installed my software on it. I then had to build the configuration file that is specific to system 5 from memory. Each meter speaks the ModBus over TCP/IP protocol, and thus each meter as a different bus id. Fortunately, I'm pretty anal about this and tend to follow a specific method of id numbering.
Once I got the configuration file done and tested the software to see if it would even run properly on Windows XP (it did!), I called the CEO back and told him I had a laptop ready to go for system 5. I drove out to Hollywood and the CFO (who was there with the CEO) had to walk about a mile out of the security zone to meet me and pick up the laptop.
I told her I put a fresh install of the data acquisition software on the laptop and it's already configured for system 5 - it *should* just work once you plug it in.
I didn't get any phone calls after dropping off the laptop, so I called the CFO once I got home and asked her if everything was working okay. She told me it worked flawlessly - it was Plug 'n Play so to speak. She even said she was impressed, she thought she'd have to call me to iron out one or two configuration issues to get it talking to the meters.
All in all, crisis averted! At work on Monday, my supervisor told me that my name was Mud that day (by the CEO), but I still work here!
Here's a picture of the inside of system 8 (similar to system 5 - same hardware)
15 -
Senior development manager in my org posted a rant in slack about how all our issues with app development are from
“Constantly moving goalposts from version to version of Xcode”
It took me a few minutes to calm myself down and not reply. So I’ll vent here to myself as a form of therapy instead.
Reality Check:
- You frequently discuss the fact that you don’t like following any of apples standards or app development guidelines. Bit rich to say the goalposts are moving when you have your back to them.
- We have a custom everything (navigation stack handler, table view like control etc). There’s nothing in these that can’t be done with the native ones. All that wasted dev time is on you guys.
- Last week a guy held a session about all the memory leaks he found in these custom libraries/controls. Again, your teams don’t know the basic fundamentals of the language or programming in general really. Not sure how that’s apples fault.
- Your “great emphasis on unit testing” has gotten us 21% coverage on iOS and an Android team recently said to us “yeah looks like the tests won’t compile. Well we haven’t touched them in like a year. Just ignore them”. Stability of the app is definitely on you and the team.
- Having half the app in react-native and half in native (split between objective-c and swift) is making nobodies life easier.
- The company forces us to use a custom built CI/CD solution that regularly runs out of memory, reports false negatives and has no specific mobile features built in. Did apple force this on us too?
- Shut the fuck up5 -
Someone on a C++ learning and help discord wanted to know why the following was causing issues.
char * get_some_data() {
char buffer[1000];
init_buffer(&buffer[0]);
return &buffer[0];
}
I told them they were returning a pointer to a stack allocated memory region. They were confused, didn't know what I was talking about.
I pointed them to two pretty decently written and succinct articles, the first about stack vs. heap, and the second describing the theory of ownership and lifetimes. I instructed to give them a read, and to try to understand them as best as possible, and to ping me with any questions. Then I promised to explain their exact issue.
Silence for maybe five minutes. They disregard the articles, post other code saying "maybe it's because of this...". I quickly pointed them back at their original code (the above) and said this is 100% an issue you're facing. "Have you read the articles?"
"Nope" they said, "I just skimmed through them, can you tell me what's wrong with my code?"
Someone else chimed in and said "you need to just use malloc()." In a C++ room, no less.
I said "@OtherGuy please don't blindly instruct people to allocate memory on the heap if they do not understand what the heap is. They need to understand the concepts and the problems before learning how C++ approaches the solution."
I was quickly PM'd by one of the server's mods and told that I was being unhelpful and that I needed to reconsider my tone.
Fuck this industry. I'm getting so sick of it.26 -
The stupid stories of how I was able to break my schools network just to get better internet, as well as more ridiculous fun. XD
1st year:
It was my freshman year in college. The internet sucked really, really, really badly! Too many people were clearly using it. I had to find another way to remedy this. Upon some further research through Google I found out that one can in fact turn their computer into a router. Now what’s interesting about this network is that it only works with computers by downloading the necessary software that this network provides for you. Some weird software that actually looks through your computer and makes sure it’s ok to be added to the network. Unfortunately, routers can’t download and install that software, thus no internet… but a PC that can be changed into a router itself is a different story. I found that I can download the software check the PC and then turn on my Router feature. Viola, personal fast internet connected directly into the wall. No more sharing a single shitty router!
2nd year:
This was about the year when bitcoin mining was becoming a thing, and everyone was in on it. My shitty computer couldn’t possibly pull off mining for bitcoins. I needed something faster. How I found out that I could use my schools servers was merely an accident.
I had been installing the software on every possible PC I owned, but alas all my PC’s were just not fast enough. I decided to try it on the RDS server. It worked; the command window was pumping out coins! What I came to find out was that the RDS server had 36 cores. This thing was a beast! And it made sense that it could actually pull off mining for bitcoins. A couple nights later I signed in remotely to the RDS server. I created a macro that would continuously move my mouse around in the Remote desktop screen to keep my session alive at all times, and then I’d start my bitcoin mining operation. The following morning I wake up and my session was gone. How sad I thought. I quickly try to remote back in to see what I had collected. “Error, could not connect”. Weird… this usually never happens, maybe I did the remoting wrong. I went to my schools website to do some research on my remoting problem. It was down. In fact, everything was down… I come to find out that I had accidentally shut down the schools network because of my mining operation. I wasn’t found out, but I haven’t done any mining since then.
3rd year:
As an engineering student I found out that all engineering students get access to the school’s VPN. Cool, it is technically used to get around some wonky issues with remoting into the RDS servers. What I come to find out, after messing around with it frequently, is that I can actually use the VPN against the screwed up security on the network. Remember, how I told you that a program has to be downloaded and then one can be accepted into the network? Well, I was able to bypass all of that, simply by using the school’s VPN against itself… How dense does one have to be to not have patched that one?
4th year:
It was another programming day, and I needed access to my phones memory. Using some specially made apps I could easily connect to my phone from my computer and continue my work. But what I found out was that I could in fact travel around in the network. I discovered that I can, in fact, access my phone through the network from anywhere. What resulted was the discovery that the network scales the entirety of the school. I discovered that if I left my phone down in the engineering building and then went north to the biology building, I could still continue to access it. This seems like a very fatal flaw. My idea is to hook up a webcam to a robot and remotely controlling it from the RDS servers and having this little robot go to my classes for me.
What crazy shit have you done at your University?9 -
My code review nightmare part 3
Performed a review on/against a workplace 'nemesis'. I didn't follow the department standards document (cause I could care less about spacing, sorted usings, etc) and identified over 80 bugs, logic errors, n+1 patterns, memory leaks (yes, even in .net devs can cause em'), and general bad behavior (ex.'eating' exceptions that should be handled or at least logged)
Because 'Jeff' was considered a golden child (that's another long TL;DR), his boss and others took a major offense and demanded I justify my review, item by item.
About 2 hours into the meeting, our department mgr realized embarrassing Jeff any further wasn't doing anyone any good and decided to take matters into his own hands. Thinking 'well, its about time he did his job', I go back to my desk. About an hour later..
Mgr: "I need you in the conference room, RIGHT NOW!"
<oh crap>
Mgr: "I spoke to Jeff and I think I know what the problem is. Did you ever train him on any of the problems you identified in the review?"
Me: "Um, no. Why would I?"
Mgr: "Ha!..I was right. So lets agree the problems are partially your fault, OK?"
Me: "Finding the bugs in his code is somehow my fault?"
Mgr: "Yes! For example, the n+1 problem in using the WCF service, you never trained him on how to use the service. You wrote the service, correct?"
Me: "Yes, but it's not my job to teach him how to write C#. I documented the process and have examples in the document to avoid n+1. All he had to do was copy/paste."
Mgr: "But you never sat with Jeff and talked to him like a human being? You sit over there in your silo and are oblivious to the problems you cause. This ends today!"
Me: "What the...I have no idea what you are talking about. What in the world did Jeff tell you?"
Mgr: "He told me enough and I'm putting an end to it. I want a compressive training class developed on how to use your service. I'll give you a month to get your act together and properly train these developers."
3 days later, I submit the power-point presentation and accompanying docs. It was only one WCF with a handful of methods. Mgr approved the training, etc..etc. execute the 'training', and Jeff submits a code review a couple of weeks later. From over 80 issues to around 50. The poop hits the fan again.
Mgr: "What's your problem? When are you going to take your responsibility seriously?"
Me: "Its pretty clear I don't have the problem. All the review items were also verified by other devs. Its not me trying to be an asshole."
Mgr: "Enough with the excuses. If you think you can do a better job *you* make the code changes and submit them for Jeff for review. No More Excuses!"
Couple of days later, I make the changes, submit them for review, and Jeff really couldn't say too much other than "I don't see this as an improvement"
TL;DR, I had been tracking the errors generated by the site due to the bugs prior to my changes. After deployment, # of errors went from thousands per hour to maybe hundreds per day (that's another story) and the site saw significant performance increases, fewer customer complaints, etc..etc.
At a company event, the department VP hands out special recognition awards:
VP: "This award is especially well earned. Not only does this individual exemplify the company's focus on teamwork, he also went above and beyond the call of duty to serve our customers. Jeff, come on up and get this well deserved award."19 -
A small bug is found.
Chad dev:
😎 *Exists*
> Writes a simple ad hoc solution in a few lines
> Self documenting code with constant run time
> No external dependencies needed
> Fixes the bug, easy to test and does not introduce any new issues
That guy nobody likes (AKA. regex simp coder):
🤡 'This can be "simplified" into oNE LiNe'
> Writes a long regex expression that has to line wrap the editor window several times
> Writes an essay in the comments to explain it's apparent brilliance to the peasant reader
> Exponential run time (bwahahah), excessive memory requirements
> Needs to import additional frameworks, requires more testing that will delay release schedule
> Also fixes bug but the software now needs 2x ram to run and is 3x slower
> Really puts the "simp" in simplified, but not the way you would expect26 -
Okay, story time.
Back during 2016, I decided to do a little experiment to test the viability of multithreading in a JavaScript server stack, and I'm not talking about the Node.js way of queuing I/O on background threads, or about WebWorkers that box and convert your arguments to JSON and back during a simple call across two JS contexts.
I'm talking about JavaScript code running concurrently on all cores. I'm talking about replacing the god-awful single-threaded event loop of ECMAScript – the biggest bottleneck in software history – with an honest-to-god, lock-free thread-pool scheduler that executes JS code in parallel, on all cores.
I'm talking about concurrent access to shared mutable state – a big, rightfully-hated mess when done badly – in JavaScript.
This rant is about the many mistakes I made at the time, specifically the biggest – but not the first – of which: publishing some preliminary results very early on.
Every time I showed my work to a JavaScript developer, I'd get negative feedback. Like, unjustified hatred and immediate denial, or outright rejection of the entire concept. Some were even adamantly trying to discourage me from this project.
So I posted a sarcastic question to the Software Engineering Stack Exchange, which was originally worded differently to reflect my frustration, but was later edited by mods to be more serious.
You can see the responses for yourself here: https://goo.gl/poHKpK
Most of the serious answers were along the lines of "multithreading is hard". The top voted response started with this statement: "1) Multithreading is extremely hard, and unfortunately the way you've presented this idea so far implies you're severely underestimating how hard it is."
While I'll admit that my presentation was initially lacking, I later made an entire page to explain the synchronisation mechanism in place, and you can read more about it here, if you're interested:
http://nexusjs.com/architecture/
But what really shocked me was that I had never understood the mindset that all the naysayers adopted until I read that response.
Because the bottom-line of that entire response is an argument: an argument against change.
The average JavaScript developer doesn't want a multithreaded server platform for JavaScript because it means a change of the status quo.
And this is exactly why I started this project. I wanted a highly performant JavaScript platform for servers that's more suitable for real-time applications like transcoding, video streaming, and machine learning.
Nexus does not and will not hold your hand. It will not repeat Node's mistakes and give you nice ways to shoot yourself in the foot later, like `process.on('uncaughtException', ...)` for a catch-all global error handling solution.
No, an uncaught exception will be dealt with like any other self-respecting language: by not ignoring the problem and pretending it doesn't exist. If you write bad code, your program will crash, and you can't rectify a bug in your code by ignoring its presence entirely and using duct tape to scrape something together.
Back on the topic of multithreading, though. Multithreading is known to be hard, that's true. But how do you deal with a difficult solution? You simplify it and break it down, not just disregard it completely; because multithreading has its great advantages, too.
Like, how about we talk performance?
How about distributed algorithms that don't waste 40% of their computing power on agent communication and pointless overhead (like the serialisation/deserialisation of messages across the execution boundary for every single call)?
How about vertical scaling without forking the entire address space (and thus multiplying your application's memory consumption by the number of cores you wish to use)?
How about utilising logical CPUs to the fullest extent, and allowing them to execute JavaScript? Something that isn't even possible with the current model implemented by Node?
Some will say that the performance gains aren't worth the risk. That the possibility of race conditions and deadlocks aren't worth it.
That's the point of cooperative multithreading. It is a way to smartly work around these issues.
If you use promises, they will execute in parallel, to the best of the scheduler's abilities, and if you chain them then they will run consecutively as planned according to their dependency graph.
If your code doesn't access global variables or shared closure variables, or your promises only deal with their provided inputs without side-effects, then no contention will *ever* occur.
If you only read and never modify globals, no contention will ever occur.
Are you seeing the same trend I'm seeing?
Good JavaScript programming practices miraculously coincide with the best practices of thread-safety.
When someone says we shouldn't use multithreading because it's hard, do you know what I like to say to that?
"To multithread, you need a pair."18 -
Ooof.
In a meeting with my client today, about issues with their staging and production environments.
They pull in the lead dev working on the project. He's a 🤡 who freelanced for my previous company where I was CTO.
I fired him for being plain bad.
Today he doesn't recognize me and proceeds to patronize me in server administration...
The same 🤡 that checks production secrets into git, builds projects directly in the production vm.
Buckle up... Deploys *both* staging and production to the *same* vm...
Doesn't even assign a static IP to the VM and is puzzled when its IP has changed after a relaunch...
Stores long term aws credentials instead of using instance roles.
Claims there are "memory leaks", in a js project. (There may be memory misuse by project or its dependencies, an actual memory leak in v8 that somehow only he finds...? Don't think so.)
Didn't even set up pm2 in systemd so his services didn't even relaunch after a reboot...
You know, I'm keeping my mouth shut and make the clown work all weekend to fix his own hubris.11 -
Boss wants to scale our webservers because it seems they're having performance/capacity issues....
I'VE BEEN TELLING HIM FOR WEEKS IT'S NOT THE SERVERS!!! IT'S THE FACT THAT EVERY SINGLE QUERY HITS A SINGLE MONGODB... AND NO CACHE EITHER... AND THE DB CANT BE ENTIRELY LOADED INTO MEMORY AS ITS TOO BIG FOR RAM ON A SINGLE SERVER...
HOW THE FUCK CAN YOU SCALE IF EVERYTHING HAS A DEPENDENCY ON 1 NON-DISTRIBUTED DATABASE?6 -
I have to rant a bit about the toxic reactions to a constructive Q&A website.
People keep complaining that they get downvotes and corrections, or stuff like that.
Are you fucking kidding me?
So you expect people to spend their own time for absolutely free, to help you, while you don't even want to invest in describing the issue you're having properly? And then complain that people are having issues in understanding your questions?
Let's look at this scientifically. Let's gather up some questions that have been received badly on SO in the last few hours. From the top (simply put https://stackoverflow.com/questions... in front of the id):
47619033 - person wants a discussion about an algorithm while not providing any information about what worked and what failed. "Please write a program for me". Breaking at least 2 rules.
47619027 - "check out my videos" spam
47619030 - "Here's the manual that has my answer but I can't find my answer in it".
47619004 - "how do I keep variables in memory"
47618997 - debug this exception, I'll give you no info on what I tried and failed. Screw this, you guys figure this out, I'm going out for beer.
47618993 - expects everyone to guess what the input is, what the expected output is, and whether he has read what HashMap is in the manual. But sure, this question is so far the best out of all the bad ones.
47618985 - please write code according to my specifications
Should I go on? There wasn't a single clear question about problems in code in this entire small set. Be free to continue searching, let me know if you find something that:
1. You understand what's being asked
2. Answer is clear and non-ambiguous (ex. NOT "which language is the coolest?")
3. Not asking someone to write a program for them.
4. Answer is not found in the most basic form of manuals (ex. php.net)
5. Is about programming.
The point is:
If you get downvoted on Stackoverflow - then you wrote a shitty question. Instead of coming over here and venting uselessly, simply address the concerns and at least TRY to write a clear question if you expect any answers.5 -
Soooo I think I have finally come to the point that I may have to create a YouTube channel, to teach software engineering from the ground up... and teach it the way the universities and everyone else should be teaching it, so that they have a solid foundation.... throwing hello world, and loops and variables at folks out of the box without any of the environment context or low level embedded register, even logic gate understanding
That lack of understanding is why, soooo many college students and younger folks, are actually pretty shitty engineers. Everything is high level languages and theoretical concepts to them. Nothing practical, that’s why there’s sooo many python and java developers that can’t for the life of them understand memory management, low level hardware interfacing etc, because the colleges don’t teach it the way it use to be taught.
I seriously fear 30 years from now or sooner when there are few embedded engineers only left till retirement, as without those folks the whole pyramid of electronics falls to pieces.
Java, C#, python, all that shit don’t run on the bare metal... there’s this magical layer of C, and assembler that does all the work just so folks can abstract their thoughts.
Either 1 of two situations will happen.. price of electronics will rise because the embedded guys are few and far between therefore salaries skyrocket... OR everything starts running shit like java on the metal, where there are a over abundance of developers, their salaries will be low because there are soo many but the processing power, space, and energy needed to run java natively causes electronics cost to increase
but regardless 30 years from now if those script kiddies are building everything I fear it cuz there’s gonna be memory leaks, and overflow issues everywhere.. shit be blowing up more than 4th of July.. lol
Soooo in effort to prevent that and keep the embedded engineers up, or atleast properly educate the script kiddies, I’m gonna make that YouTube channel.. 1 maybe 2 videos a week, 1-2 hours sessions each.. starting at the fucken ground and building up.39 -
A few years ago I was browsing Bash.org, and a user posted that he'd physically lost a machine.
A few weeks ago, I'd switched my router out for OPNSense. I figured it was time to start cleaning up my network.
Over the course of tracking down IP addresses and assigning statics to mac addresses, I spotted an IP I didn't recognize.
Being a home network, I'm pretty familiar with everything on the network by IP, so was a little taken aback.
I did some testing, found out that it was a Linux box. Cool.
I can SSH into it. Ok.
Logs show that it's running fine, no CPU/Memory/Harddrive issues. Nice.
So where is it?
Traceroute shows its connected directly to the router... Maybe over an unmanaged switch...
Hostname is "localhost"... That's no help.
I've walked the network 4 times now, and God knows where it is.
I think maybe I'll just leave it alone. If it ain't broke...9 -
Last week, the team lead told me that he can't merge because my code has code smells and going forward, can't have that. We use Sonar and well the way to "fix it" according to him is to mark the line using //NOSONAR.
Most of the issues are minor like Unused imports and for me incomplete TODOs.
And before the "verbal" rule was only need to fix Major + issues. And well the reason I use TODOs is to mark code that probably needs changing in the future. I know there's going to be some feature that these lines have to be changed. But the requirements are fully defined yet from business.
But I sort of blew up on him. YOU WANT TO ENFORCE ZERO CODE SMELLS NOW?!?!?! AND THESE MINOR ISSUES? MARK THEM WITH NOSONAR?
HERE'S WHAT I THINK FOR THE LAST X YEARS... THE CODE DESIGN IS SHIT, MINOR CODE SMELLS AND MANUALLY MARKING THE ONES U NEED TO KEEP... ARE THE LEAST OF OUR PROBLEMS...
THE OTHER PROBLEMS I'VE MENTIONED BEFORE EVER. MOS YEAR BUT YOU DIMWITS NEVER LISTEN.
YOU THINK MY TODOS ARE BAD... 90% OF THE CODE AND FEATURES (THE ONES NOT DONE BY ME) LOOK AND SMELL LIKE MONKEY SHIT. UNDOCUMENTED, MESSY, FULL OF BUGS.
AND GUESS WHAT? NEW FEATURE, SOME DEV FORGETS TO CHANGE SOME COMPONENT THAT DEPENDS ON IT. WOULDN'T IT BE GREATE IF THERE WERE BOOKMARKS... O WAIT...
i just was catching up on comics again and saw this one... with triggered my memory and this rant... My first thought was to forward it to him...
11 -
Our team makes a software in Java and because of technical reasons we require 1GB of memory for the JVM (with the Xmx switch).
If you don't have enough free memory the app without any sign just exits because the JVM just couldn't bite big enough from the memory.
Many days later and you just stand there without a clue as to why the launcher does nothing.
Then you remember this constraint and start to close every memory heavy app you can think of. (I'm looking at you Chrome) No matter how important those spreadsheets or illustrator files. Congratulation you just freed up 4GB of memory, things should work now! WRONG!
But why you might ask. You see we are using 32-bit version of java because someone in upper management decided that it should run on any machine (even if we only test it on win 7 and high sierra) and 32 is smaller than 64 so it must be downwards compatible! we should use it! Yes, in 2019 we use 32-bit java because some lunatic might want to run our software on a Windows XP 32-bit OS. But why is this so much of a problem?
Well.. the 32-bit version of Java requires CONTIGUOUS FREE SPACE IN MEMORY TO EVEN START... AND WE ARE REQUESTING ONE GIGABYTE!!
So you can shove your swap and closed applications up your ass but I bet you that you won't get 1GB contiguous memory that way!
Now there will be a meeting about this issue and another related to the issues with 32-bit JVM tomorrow. The only problem is that this issue only occures if you used up most of your memory and then try to open our software. So upper management will probably deem this issue minor and won't allow us to upgrade to 64-bit... in 20fucking1910 -
My new team more or less forced me to change from a Windows machine to a Mac (Mac book pro, I think?) due to "compatibility issues", so I thought I might as well see what all the Mac fuzz is about. Here is a list of my observations so far:
- If you try powering on the mac book with more than one DisplayPort cable plugged in, the screen will go black until you plug all DP cables out
- If you unplug your DisplayPort cables to go to a meeting you can expect one of the monitors getting frozen on the blurry login screen (without any login prompt) when you get back (while the main monitor shows your desktop without the taskbar)
- If you get out of range from your wireless peripherals (keyboard in this case) while going to a meeting your keyboard layouts are most likely deleted and reset to U.S qwerty when you get back to your desk
- When pressing quit on any application you can't expect in to close and clear up memory, it will remain in the background until you force kill it.
- There is a 50/50 chance that your Mac book never wakes up from sleep
Best thing is that I found out today that the software we use is completely compatible with any RedHat/Solaris distro.
Rant over.12 -
I haven't ranted for today, but I figured that I'd post a summary.
A public diary of sorts.. devRant is amazing, it even allows me to post the stuff that I'd otherwise put on a piece of paper and probably discard over time. And with keyboard support at that <3
Today has been a productive day for me. Laptop got restored with a "pacman -Syu" over a Bluetooth mobile data tethering from my phone, said phone got upgraded to an unofficial Android 9 (Pie) thanks to a comment from @undef, etc.
I've also made myself a reliable USB extension cord to be able to extend the 20-30cm USB-A male to USB-C male cord that Huawei delivered with my Nexus 6P. The USB-C to USB-C cord that allows for fast charging is unreliable.. ordered some USB-C plugs for that, in order to make some high power wire with that when they arrive.
So that plug I've made.. USB-A male to USB-A female, in which my short USB-C to USB-A wire can plug in. It's a 1M wire, with 18AWG wire for its power lines and 28AWG wires for its data lines. The 18AWG power lines can carry up to 10A of current, while the 28AWG lines can carry up to 1A. All wires were made into 1M pieces. These resulted in a very low impedance path for all of them, my multimeter measured no more than 200 milliohms across them, though I'll have to verify and finetune that on my oscilloscope with 4-wire measurement.
So the wire was good. Easy too, I just had to look up the pinout and replicate that on the male part.
That's where the rant part comes in.. in fact I've got quite uncomfortable with sentences that don't include at least one swear word at this point. All hail to devRant for allowing me to put them out there without guilt.. it changed my very mind <3
Microshaft WanBLowS.
I've tried to plug my DIY extension cord into it, and plugged my phone and some USB stick into it of which I've completely forgot the filesystem. Windows certainly doesn't support it.. turns out that it was LUKS. More about that later.
Windows returned that it didn't support either of them, due to "malfunctioning at the USB device". So I went ahead and plugged in my phone directly.. works without a problem. Then I went ahead and troubleshooted the wire I've just made with a multimeter, to check for shorts.. none at all.
At that point I suspected that WanBLowS was the issue, so I booted up my (at the time) problematic Arch laptop and did the exact same thing there, testing that USB stick and my phone there by plugging it through the extension wire. Shit just worked like that. The USB stick was a LUKS medium and apparently a clone of my SanDisk rootfs that I'm storing my Arch Linux on my laptop at at the time.. an unfinished migration project (SanDisk is unstable, my other DM sticks are quite stable). The USB stick consumed about 20mA so no big deal for any USB controller. The phone consumed about 500mA (which is standard USB 2.0 so no surprise) and worked fine as well.. although the HP laptop dropped the voltage to ~4.8V like that, unlike 5.1V which is nominal for USB. Still worked without a problem.
So clearly Windows is the problem here, and this provides me one more reason to hate that piece of shit OS. Windows lovers may say that it's an issue with my particular hardware, which maybe it is. I've done the Windows plugging solely through a USB 3.0 hub, which was plugged into a USB 3.0 port on the host. Now USB 3.0 is supposed to be able to carry up to 1A rather than 500mA, so I expect all the components in there to be beefier. I've also tested the hub as part of a review, and it can carry about 1A no problem, although it seems like its supply lines aren't shorted to VCC on the host, like a sensible hub would. Instead I suspect that it's going through the hub's controller.
Regardless, this is clearly a bad design. One of the USB data lines is biased to ~3.3V if memory serves me right, while the other is biased to 300mV. The latter could impose a problem.. but again, the current path was of a very low impedance of 200milliohms at most. Meanwhile the direct connection that omits the ~200ohm extension wire worked just fine. Even 300mV wouldn't degrade significantly over such a resistance. So this is most likely a Windows problem.
That aside, the extension cord works fine in Linux. So I've used that as a charging connection while upgrading my Arch laptop (which as you may know has internet issues at the time) over Bluetooth, through a shared BNEP connection (Bluetooth tethering) from my phone. Mobile data since I didn't set up my WiFi in this new Pie ROM yet. Worked fine, fixed my WiFi. Currently it's back in my network as my fully-fledged development host. So that way I'll be able to work again on @Floydian's LinkHub repository. My laptop's the only one who currently holds the private key for signing commits for git$(rm -rf ~/*)@nixmagic.com, hence why my development has been impeded. My tablet doesn't have them. Guess I'll commit somewhere tomorrow.
(looks like my rant is too long, continue in comments)3 -
I propose that the study of Rust and therefore the application of said programming language and all of the technology that compromises it should be made because the language is actually really fucking good. Reading and studying how it manages to manipulate and otherwise use memory without a garbage collector is something to be admired, illuminating in its own accord.
BUT going for it because it is a "beTter C++" should not constitute a basis for it's study.
Let me expand through anecdotal evidence, which is really not to be taken seriously, but at the same time what I am using for my reasoning behind this, please feel free to correct me if I am wrong, for I am a software engineer yes, I do have academic training through a B.S in Computer Science yes, BUT my professional life has been solely dedicated to web development, which admittedly I do not go on about technical details of it with you all because: I am not allowed to(1) and (2)it is better for me to bitch and shit over other petty development related details.
Anecdotal and otherwise non statistically supported evidence: I have seen many motherfuckers doing shit in both C and C++ that ADMIT not covering their mistakes through the use of a debugger. Mostly because (A) using a debugger and proper IDE is for pendejos and debugging is for putos GDB is too hard and the VS IDE is waaaaaa "I onlLy NeeD Vim" and (B) "If an error would have registered then it would not have compiled no?", thus giving me the idea that the most common occurrences of issues through the use of the C father/son languages come from user error, non formal training in the language and a nice cusp of "fuck it it runs" while leaving all sorts of issues that come from manipulating the realm of the Gods "memory".
EVERY manual, book, coming all the way back to the K&C book talks about memory and the way in which developers of these 2 languages are able to manipulate and work on it. EVERY new standard of the ISO implementation of these languages deals, through community effort or standard documentation about the new items excised through features concerning MODERN (meaning, no, the shit you learned 20 years ago won't fucking cut it) will not cut it.
THUS if your ass is not constantly checking what the scalpel of electrical/circuitry/computational representation of algorithms CONDONES in what you are doing then YOU are the fucking problem.
Rust is thus no different from the original ideas of the developers behind Go when stating that their developers are not efficient enough to deal with X language, Rust protects you, because it knows that you are a fucking moron, so the compiler, advanced, and well made as it is, will give you warnings of your own idiotic tendencies, which would not have been required have you not been.....well....a fucking idiot.
Rust is a good language, but I feel one that came out from the necessity of people writing system level software as a bunch of fucking morons.
This speaks a lot more of our academic endeavors and current documentation than anything else. But to me DEALING with the idea of adapting Rust as a better C++ should come from a different point of view.
Do I agree with Linus's point of view of C++? fuck no, I do not, he is a kernel engineer, a damn good one at that regardless of what Dr. Tanenbaum believes(ed) but not everyone writes kernels, and sometimes that everyone requires OOP and additions to the language that they use. Else I would be a fucking moron for dabbling in the dictionary of languages that I use professionally.
BUT in terms of C++ being unsafe and unsecured and a horrible alternative to Rust I personaly do not believe so. I see it as a powerful white canvas, in which you are able to paint software to the best of your ability WHICH then requires thorough scrutiny from the entire team. NOT a quick replacement for something that protects your from your own stupidity BY impending the use of what are otherwise unknown "safe" features.
To be clear: I am not diminishing Rust as the powerhouse of a language that it is, myself I am quite invested in the language. But instead do not feel the reason/need before articles claiming it as the C++ killer.
I am currently heavily invested in C++ since I am trying a lot of different things for a lot of projects, and have been able to discern multiple pain points and unsafe features. Mainly the reason for this is documentation (your mother knows C++) and tooling, ide support, debugging operations, plethora of resources come from it and I have been able to push out to my secret project a lot of good dealings. WHICH I will eventually replicate with Rust to see the main differences.
Online articles stating that one will delimit or otherwise kill the other is well....wrong to me. And not the proper approach.
Anyways, I like big tits and small waists.14 -
Today’s lesson in C programming:
DON’T use
system( “clear” );
in Mac OS...
Causes seg Fault in ur program when it is perfectly correct...
What happened was... a friend wanted help with C programming and had written this code... but it was getting seg Fault randomly... just random seg Fault when his code was correct...
I pinpointed the seg Fault to a printf statement but the statement was correct...
Off to search the issue I went, found out that flushing problems can occur in printf if u don’t use \n.
This happens randomly. Thought this might b the reason...
Went to a VM running Arch Linux and tested the code there... worked perfectly. No issues whatsoever.
From a distant memory I remembered some people discussing to never use system( “clear” ); since it causes issues.
Thought to remove that line from code, thinking it wouldn’t make any difference.
Well imagine my shock when the code worked fine after remove that freaking line...
M gonna blame this one on Mac OS since arch had no issues with it 😡😡
Now to find alternative to system( “clear” );
Damm it I spent 4-5 hours on this crap!!!!!!9 -
The only thing more dangerous than an alcoholic short-term-memory-challenged non-technical throw-you-under-the-bus IT director with self-esteem issues that are sporadically punctuated by delusions of superiority is one who fears for his job. Submitted for your inspection: a besotted mass of near-human brain function who not only has a 50 person IT department to run, but has also been questioned by the business owners as to what he actually does. So he has decided to show them. He has purchased a vendor product to replace a core in-house developed application used to facilitate creating the product the business sells. The purchased software only covers about 40 percent of the in-house application's functionality, so he is contracting with the vendor to perform custom development on the purchased product (at a cost likely to be just shy of six-figures) so that about 90 percent of existing functionality will be covered. He has asked one of his developers (me) to scale down the existing software to cover the functionality gaps the purchased software creates. There is no deployment plan that will allow the business to transition from the current software to the new vendor-supplied one without significantly hurting the ability of the business to function. When anyone raises this issue he dismisses it with sage musings such as, "I know it will be painful, but we'll just have to give the users really good support." Because he has no idea what any of his staff actually does, he is expecting one of his developers (again, unfortunately, me) to work with the vendor so that the Frankensoftware will perform as effectively as the current software (essentially as a project manager since there will be no in-house coding involved). Lastly, he refuses to assign someone to be responsible for the software: taking care of maintenance, configuration, and issue resolutions after it has been rolled out. When I pointedly tell him I will not be doing that (because this is purchased software and I am not a system admin or desktop engineer) he tells me, "Let me think about this." The worst part is that this is only one of four software replacement initiatives he is injecting himself into so he can prove his worth to the business owners. And by doing so he is systematically making every software development initiative akin to living in Dante's Eighth Circle. I am at the point where I want to burn my eye out with a hot poker, pour salt into the wound, and howl to the heavens in unbearable agony for a month, so when these projects come to fruition, and I am suffering the wrath of the business owners, I can look back on that moment I lost my eye and think "good times."4
-
I'm convinced this is going to be wildly unpopular, but hey...
Please stop writing stuff in C! Aside from a few niche areas (performance-critical, embedded, legacy etc. workloads) there's really no reason to other than some fumbled reason about "having full control over the hardware" and "not trusting these modern frameworks." I get it, it's what we all grew up with being the de-facto standard, but times have moved on, and the number of massive memory leaks & security holes that keep coming to light in *popular*, well-tested software is a great reason why you shouldn't think you're smart enough to avoid all those issues by taking full control yourself.
Especially, if like most C developers I've come across, you also shun things like unit tests as "something the QA department should worry about" 😬12 -
Just found this absolute 5 head, galaxy brain implementation in a piece of code which is called in a loop by a background scheduler which has performance issues.
There are 20+ properties, some which are recursively calling other properties with the same implementation style in this class.
Constant out of memory errors have been reported for this software, I wonder why...
15 -
Rust, because if we can eliminate all security issues because of buffer overflows or other memory-related problems without a GC and still be as fast as with C, that would be pretty dope for everyone.1
-
JavaScript is a rollercoaster. From "Golly hello world is easy and I can make webpages now", to "wtf '1'+1 is '11' kill me now", to "it's not be that bad if you know how to use it", to discovering typescript and it starts feeling like a real language.
... until you can't build the project because you have too many types so you blow the memory limit in node. I can up the limit, but I can't guarantee that we won't blow past this in the future. Browsing issues on the ts repo reveals that this has been a thing for years.
Sticking with the rollercoaster analogy I'm now at "Burn it all to the ground".5 -
>Be client
>Have an issue with incredibly slow webpage load time
>Blame memcache issues
So... I look into the problem. Yes, the page either loads up fast, or times out. So, into the logs I go. Webserver is fine (except the timeout), PHP though... Error log is fine (just notices), but slow log shows the issue is the database (of course... its always the database... ugh)
So, checking the database, there is one ugly query that seems to be an issue. 5 joins and a huge where condition.
So I run EXPLAIN on the query and... Proceed to bang my head against the wall.
OF COURSE ITS SLOW YOU FU******, NONE OF YOUR TABLES HAVE ANY INDEXES.
What do they expect when the database has to always go down the whole table and do everything in memory, until it runs out and has to dump it all on disk and work with it there.
Ugh... Some clients... -
A friend came to me whether i want to do a project on c++(someone asked him to find a c++ guy).
Me needing money didn’t refuse. Even though i am a Java developer with 0 skills on c++, but wanted to give it a try.
So project started, and it was about a plugin for rhinoceros app(3d graphics app).
The plugin was simple, had some views and some services to upload a file into s3 and some api calls, not something complex..
So i ended up working on the project together with my friend(web dev).
So long story short, we had a lot of issues, but considering we both had no knowledge on c++, we were really lucky to finish the product almost on time(3 days after).
Did no memory management even though i’ve read that we have to do that by our selfs and that c++ doesn’t have garbage collector.
But the plugin worked great even without garbage collector.
Had a lot issues with string manipulation, which almost drive me crazy.
PS: did a post here before taking the project, to ask whether it is a good idea to take the project or not, had some positive and some negative replies, but i deleted the post since i thought i was breaking the NDA i signed 😂😂
PS2: just finished OCAJP 8 last week with a great score😃6 -
Note to self: never EVER buy iPhone again. “It won’t stutter after a year”, they’ve said.
Right now my 6s is just one big overheating piece of mess. Right now I have to charge it 3 times a day. Resprings randomly. Very often discharges 2% per minute. All the time lacks memory. iCloud picture syncing SUCKS. The Lightning cable is the worst excuse for buying overpriced cables which will break after a half of year. The only plus is a camera, how easy it is to update the iOS, included earbuds, iMesssage (but I use WhatsApp nonetheless) and battery widget.
And that’s it.
If someone says ever again that “iOS is the best operating system, it doesn’t have any issues whatsoever”, I would say “stop doping”, because I don’t see why it’s so great. Just while typing this rant my battery decreased from 25% to 15%18 -
Android, please fuck off. I cant install/update apps because i don't have enough space. So 1gb of free memory is not enough for a 10mb app?
This is my 3rd android phone, and I've had the same issues on all of them.
Probably getting a iPhone 7. Sad, i know :(19 -
I really think there should be a subject in every CS course to teach us how to handle/work-under Grade-A assholes and dumbfucks. Not that it would help, but atleast warn us on what we are getting into.
In my opinion, development is not *that* hard or frustrating but is made so by these shitty people. But again, what do I know.
I was scolded by my boss for using for-loop to iterate through an array recently. Apparently for-loop is not used in real world projects and this iteration should be done "in-memory". My colleagues and I are still trying to understand and process that.
I was asked to add fitbit integration to a project within 2 hours just because I had "already done it a week ago" in *another* project. Luckily, it was then given to a "senior" developer who took 4 days for it and essentially copy-pasted my work without much changes, ofcourse it stopped working every now and then.
I am given unreal deadlines on my tasks, on technologies I haven't worked on before, and then expected to churn out production ready code with no bugs in them.
My boss literally just sends me the links of 1st three google results on the problems I encounter and report, after humiliating me ofcourse. Yes, I did google it and yes I went through all I could find from Google forums to GitHub issues. When the library/plugin author himself says that this feature is not yet available, don't expect me to develop it in 2 hours you dumbfuck.
And for the love of God, please stop changing the data model every single day and justify it with agile development. Think before making any changes to it. Ever heard of Join queries? Foreign keys? Or any other basic database concepts.
We reached a point where each branch in the repo had different data model. Not kidding. And we were a team of just 4 developers. Atleast inform us when you change models after discussing it with your shit for knowledge "senior" developer, so we don't have to redo it all over again. The channels on slack are not for sharing random articles only.
I am just waiting to complete my year here.
I should have known what I got myself into the day he asked me to remove the comments I had added to explain what my code does. Why you ask? Because "we don't write comments". -
Github 101 (many of these things pertain to other places, but Github is what I'll focus on)
- Even the best still get their shit closed - PRs, issues, whatever. It's a part of the process; learn from it and move on.
- Not every maintainer is nice. Not every maintainer wants X feature. Not every maintainer will give you the time of day. You will never change this, so don't take it personally.
- Asking questions is okay. The trackers aren't just for bug reports/feature requests/PRs. Some maintainers will point you toward StackOverflow but that's usually code for "I don't have time to help you", not "you did something wrong".
- If you open an issue (or ask a question) and it receives a response and then it's closed, don't be upset - that's just how that works. An open issue means something actionable can still happen. If your question has been answered or issue has been resolved, the issue being closed helps maintainers keep things un-cluttered. It's not a middle finger to the face.
- Further, on especially noisy or popular repositories, locking the issue might happen when it's closed. Again, while it might feel like it, it's not a middle finger. It just prevents certain types of wrongdoing from the less... courteous or common-sense-having users.
- Never assume anything about who you're talking to, ever. Even recently, I made this mistake when correcting someone about calling what I thought was "powerpc" just "power". I told them "hey, it's called powerpc by the way" and they (kindly) let me know it's "power" and why, and also that they're on the Power team. Needless to say, they had the authority in that situation. Some people aren't as nice, but the best way to avoid heated discussion is....
- ... don't assume malice. Often I've come across what I perceived to be a rude or pushy comment. Sometimes, it feels as though the person is demanding something. As a native English speaker, I naturally tried to read between the lines as English speakers love to tuck away hidden meanings and emotions into finely crafted sentences. However, in many cases, it turns out that the other person didn't speak English well enough at all and that the easiest and most accurate way for them to convey something was bluntly and directly in English (since, of course, that's the easiest way). Cultures differ, priorities differ, patience tolerances differ. We're all people after all - so don't assume someone is being mean or is trying to start a fight. Insinuating such might actually make things worse.
- Please, PLEASE, search issues first before you open a new one. Explaining why one of my packages will not be re-written as an ESM module is almost muscle memory at this point.
- If you put in the effort, so will I (as a maintainer). Oftentimes, when you're opening an issue on a repository, the owner hasn't looked at the code in a while. If you give them a lot of hints as to how to solve a problem or answer your question, you're going to make them super, duper happy. Provide stack traces, reproduction cases, links to the source code - even open a PR if you can. I can respond to issues and approve PRs from anywhere, but can't always investigate an issue on a computer as readily. This is especially true when filing bugs - if you don't help me solve it, it simply won't be solved.
- [warning: controversial] Emojis dillute your content. It's not often I see it, but sometimes I see someone use emojis every few words to "accent" the word before it. It's annoying, counterproductive, and makes you look like an idiot. It also makes me want to help you way less.
- Github's code search is awful. If you're really looking for something, clone (--depth=1) the repository into /tmp or something and [rip]grep it yourself. Believe me, it will save you time looking for things that clearly exist but don't show up in the search results (or is buried behind an ocean of test files).
- Thanking a maintainer goes a very long way in making connections, especially when you're interacting somewhat heavily with a repository. It almost never happens and having talked with several very famous OSSers about this in the past it really makes our week when it happens. If you ever feel as though you're being noisy or anxious about interacting with a repository, remember that ending your comment with a quick "btw thanks for a cool repo, it's really helpful" always sets things off on a Good Note.
- If you open an issue or a PR, don't close it if it doesn't receive attention. It's really annoying, causes ambiguity in licensing, and doesn't solve anything. It also makes you look overdramatic. OSS is by and large supported by peoples' free time. Life gets in the way a LOT, especially right now, so it's not unusual for an issue (or even a PR) to go untouched for a few weeks, months, or (in some cases) a year or so. If it's urgent, fork :)
I'll leave it at that. I hear about a lot of people too anxious to contribute or interact on Github, but it really isn't so bad!4 -
My first real exposure to a PC was when my father and me built one for myself. Y'know, some AMD Athlon 64, some MSI board, 2 GB of RAM, an NVIDIA 8600 GT, everything was nice.
I never put malware on that thing even though I heavily used it for things like games, I was really cautious with that even when I was like 6 years old (but my father once accidentally did, he killed it by damaging the filesystem on the harddrive which, funny enough, only took the malware with it)
I still have that PC, but it now has weird issues with memory management ;-; -
Not sure how to handle this one. My new company gave me a surface laptop to do dev ops work.
16 gigs of Ram but only a 256 SSD?
Nothing is installed so far except for MS office and acrobat and I am already running into memory issues.
My last work machine had 1TB HDD and 128 gigs of RAM (i know overkill but I could have several VM’s up and running at once).
What the fuck? Apparently the CTO ordered this piece of shit.
Also no mirco SD card like other models so I have no idea how this is going to fucking work.15 -
Was playing fallout 4 a couple days ago. About 20 minutes in. The computer just shuts off. Like no power at all. I start up the computer again. Try fallout 4 again. It shuts off at the beginning video. WTF... I try Skyrim wondering if video card is busted. Skyrim runs perfectly fine. I startup Fallout 4 again. It runs. WTF...
Next day I try fallout and bout 20 minutes in power off again. Now I am assuming cooling issue and I am trying to see temps with programs. Cannot really tell.
So today I take apart my laptop and vacuum every cooling orifice out. Vacuum any dust looking crap I can see. There was dust in the fans. All clean. I run a memory test for a couple hours. Memory passes (it was brand new memory, thought maybe flaw in ram). Now I run fallout 4. Runs fine, zero issues for about an hour.
Me to myself: CLEAN YOUR DAMN COMPUTER MORE OFTEN! Okay...
In between I read about Fallout 4 causing system reboots and shutdowns due to loading and heating. Apparently something about Fallout 4 causes this more than other games. Wild... Pretty sure it was thermal shutdown protection going on.3 -
So recently I had an argument with gamers on memory required in a graphics card. The guy suggested 8GB model of.. idk I forgot the model of GPU already, some Nvidia crap.
I argued on that, well why does memory size matter so much? I know that it takes bandwidth to generate and store a frame, and I know how much size and bandwidth that is. It's a fairly simple calculation - you take your horizontal and vertical resolution (e.g. 2560x1080 which I'll go with for the rest of the rant) times the amount of subpixels (so red, green and blue) times the amount of bit depth (i.e. the amount of values you can set the subpixel/color brightness to, usually 8 bits i.e. 0-255).
The calculation would thus look like this.
2560*1080*3*8 = the resulting size in bits. You can omit the last 8 to get the size in bytes, but only for an 8-bit display.
The resulting number you get is exactly 8100 KiB or roughly 8MB to store a frame. There is no more to storing a frame than that. Your GPU renders the frame (might need some memory for that but not 1000x the amount of the frame itself, that's ridiculous), stores it into a memory area known as a framebuffer, for the display to eventually actually take it to put it on the screen.
Assuming that the refresh rate for the display is 60Hz, and that you didn't overbuild your graphics card to display a bazillion lost frames for that, you need to display 60 frames a second at 8MB each. Now that is significant. You need 8x60MB/s for that, which is 480MB/s. For higher framerate (that's hopefully coupled with a display capable of driving that) you need higher bandwidth, and for higher resolution and/or higher bit depth, you'd need more memory to fit your frame. But it's not a lot, certainly not 8GB of video memory.
Question time for gamers: suppose you run your fancy game from an iGPU in a laptop or whatever, with 8GB of memory in that system you're resorting to running off the filthy iGPU from. Are you actually using all that shared general-purpose RAM for frames and "there's more to it" juicy game data? Where does the rest of the operating system's memory fit in such a case? Ahhh.. yeah it doesn't. The iGPU magically doesn't use all that 8GB memory you've just told me that the dGPU totally needs.
I compared it to displaying regular frames, yes. After all that's what a game mostly is, a lot of potentially rapidly changing frames. I took the entire bandwidth and size of any unique frame into account, whereas the display of regular system tasks *could* potentially get away with less, since most of the frame is unchanging most of the time. I did not make that assumption. And rapidly changing frames is also why the bitrate on e.g. screen recordings matters so much. Lower bitrate means that you will be compromising quality in rapidly changing scenes. I've been bit by that before. For those cases it's better to have a huge source file recorded at a bitrate that allows for all these rapidly changing frames, then reduce the final size in post-processing.
I've even proven that driving a 2560x1080 display doesn't take oodles of memory because I actually set the timings for such a display in order for a Raspberry Pi to be able to drive it at that resolution. Conveniently the memory split for the overall system and the GPU respectively is also tunable, and the total shared memory is a relatively meager 1GB. I used to set it at 256MB because just like the aforementioned gamers, I thought that a display would require that much memory. After running into issues that were driver-related (seems like the VideoCore driver in Raspbian buster is kinda fuckulated atm, while it works fine in stretch) I ended up tweaking that a bit, to see what ended up working. 64MB memory to drive a 2560x1080 display? You got it! Because a single frame is only 8MB in size, and 64MB of video memory can easily fit that and a few spares just in case.
I must've sucked all that data out of my ass though, I've only seen people build GPU's out of discrete components and went down to the realms of manually setting display timings.
Interesting build log / documentary style video on building a GPU on your own: https://youtube.com/watch/...
Have fun!20 -
Why is it that if you are not able to remember every single detail about something you've heard, that you as a person are deemed worthless?
Everything you do and need in life is bound to your memory.
Can't remember a name?
That's rude.
Can't remember what a technology does?
You won't get that job.
Can't remember the topics you learned about in school?
You won't get that education.
I can't remember things, my mind is constantly drifting. This, together with my inability to articulate myself clearly, makes me a complete nobody.
I hope that someday I'm just able to do something creative and not have these issues. Until then I'll just try not to jump in front of a train.2 -
Over a year ago I posted a screenshot of chrome vs edge, and chrome had 92 processes consuming 2.1GB RAM vs edges 19 processes consuming 3.2GB RAM
Just seen this... WTF google, how can you need soooo much ram, I thought you had fixed your high memory issues!!!
22 -
I scoured my memory, and realized that I have never had a fight with another developer in all my years. Yes, there have been debates, but they were logical. There are even a few unresolved debates, due to preference and ideology, but never anything with enough emotion to be called a fight.
That's pretty cool. We are smart people and can discuss important issues without resorting to petty bickering.2 -
I've implemented an in memory caching system for database queries with Redis in one of the blogs I manage.
Will it work well? Or do you think it will produce issues? I have no experience with Redis yet.14 -
Have been playing the pirated version of Rust for 30+ hours with no issues.
Decide to buy the game and every fucking time the game turns into Chrome and consumes all my RAM forcing Windows to show the low on memory dialog.
Lesson learned I guess.7 -
Friday 13th. Superstition.
0655, got WFH laptop going. 0700, VPN'ed in. Bluescreen, first in ages. Yes, Windows, the hatred is mutual. Rebooted. Windows claimed memory fault, offered check, 40 minutes. Noped out. Started machine. VPN'ed in. Some strange script error that I'd never seen before. Rebooted. Script error again. Shut down machine, then rebooted, same problem. 0715, fuck, still wearing sweaters, my e-scooter not charged, and an important Teams call at 0800.
Got dressed, stuffed laptop into backpack, hurried up by foot. Took the bus. Fuck, the next connection on the change station just had gone off. Took a taxi to make it. Arrived at the company, plugged in the laptop, started with no issues. Had the important call.
Took the laptop to IT. Tested it with external network connection and VPN. Worked with no script error. Had it checked for RAM issues. No issue. WTF had happened in the morning?!6 -
everytime i buy a new phone ,i feel this sense of extreme regret :(
i bought a moto g 5g phone last year in feb, it was so good . it didn't had any out of the world cameras or some funky stuff, but it gave a decent performance and i couldn't want any other phone.
In October my mom's phone started giving issues so i bought a realme phone for her that was half my phone's price. i couldn't spent any mor e because otherwise she wouldn't take it. she accepted the cheaper phone and within 4 days sue was cursing it. the phone had decent specs but would lag in certain apps like zoom, and won't run some call recorder apps. at the end i swapped my phone with mom's since i didn't cared about zoom or the recorder.
now this shit realme phone's memory has gone around 60% full of my stuff, and its showing its limitations. this shit auto relaunches insta after a few minutes of usage, probably because its runtime memory gets short( 4gb 128gb device gets memory shortages. nice). its video quality is shit and camera also takes rarely good pics.
the worst thing i like about smartphones today is how they over optimise the ui. this insta issue and auto call recorders not working is simply because of the realme skin running over the stock android. i had similar issues with a xiaomi device i bought for my dad sometime ago. (fortunately my dad is more medieval so that crap has not came back to me :'/ )
so overall i am buying a 3rd phone in 17 months.
This time it's Samsung f23 and am worried that it's also going to suck. i was this 🤏close to buying a pixel 6 or even an iphone coz i can afford them.
but the regret of buying such an expensive phone that will need replacement in 2 years made me rethink.
the only android os that have suited me the best is stock and as of now only 2 companies are making it : google and moto(* it's 100% aosp with 3 extra apps but they can't say that, so they also state that they are not stock os) . one plus is also a brand that i have heard makes a good os . but recently i also heard that they have completely scrapped their os and using oppo's softwares . plus the amount of tickets we get for notifications not working in oneplus, am sure their optimization is extremely aggressive.
so everything between a moderate price phone ( that will need a replacement in 2 years ) to a flagship felt unnecessary to me, so i went ahead with a Samsung's shit phone. f23 has almost same specs as moto but it's again a heavily customised os. i wanna waste my money on trying a custom os and declare it shitty.
most of my friends that use Samsung are fan of it but they are also not very techy so i guess it suits them well. i am the guy who first installs nova launcher in his device, so let's see what it brings on the table. from the 3rd person p.o.v, i felt its screen and camera images to he nice whenever i used their mobiles, so let's see what this brings to the table :(7 -
I hate ot when your client has access to new relic and they panic and start creating critical issues when the linux db server is is 80% memory..
After a 2h conference call the client said he was going to contact a 3rd party dba because he didn't believe it was normal. -
I struggled with weather to post this but I feel like I have to. I didnt want to feed into the fear or give 'them' any more reason to argue against common sense but I guess it cant be helped.
The reason I was gone for a while was because I went and got my vaccination.
In less than half hour after getting the vaccine, I was in the ICU. The staff told me I had a stroke possibly from clotting and inflamation. I couldnt feel my arm or anything below my shoulders. Yes really.
Apparently I "died" for a little while and when they brought me back I was in a coma for almost a week.
I'm back home now and I still dont fully understand what happened. Still have numbness, and horrible headaches, and can barely think straight sometimes, but the doctors told me that I didnt suffer any permanent brain damage according to my scans.
Also they told me I had old damage to my left and right temporal lobe, which makes sense because I have always suffered problems with short term memory and other issues.
And I'm just at a loss how this could happen. I have no serious injuries. We were told this is safe.
And this is the exact reason I didnt want to post it, because now tards will come in and be "lololol serves you right vaxxer!"
If I knew the side effects were this bad maybe I would have changed my mind but no one told me! I mean I think I still would have got it because we have to protect vulnerable people, but still.
The hospital assured me it wasnt the vaccine and must have been an underlaying condition, but I'm not so sure. I just happen to have a pre-existing problem that I dont know about that causes a stroke and paralysis only half an hour after the shot?
And now I dont know if I'll ever be ok. And doctors warned me I may suffer more strokes and to avoid physically demanding tasks for a while. My primary job is construction (not by chooce). Now I face the prospect of not even being able to work my existing job or do the things I love, like hiking, anymore. So much of the world doesnt make any sense right now and I just dont know what to believe anymore.
Tards will probably be in shortly to suggest I check for microchips or test fucking magnets on myself.
No, just stop.9 -
Ive been looking for a rant that mentionned being payed to review code for something like 50pounds an hour.
Can any one help me to either find the person/rant/company that offers this service?5 -
Oh man, stands out first in my memory. Was going ok until my original boss got transferred in to another department... The first replacement was one of our HR managers 🤔
The person she then made as similar to a team lead had issues with me when I had just a bit of a different perspective about a problem to solve - I soon found myself in technical support. Go figure...
I'll never forget what one of the directors said to me a little while after they shifted me:
"Not everyone can do what they want to do if they are not good at it..." I look back on that heart breaking moment and say with pride: FUCK, YOU.3 -
Identifying when to start a project over because it has gotten out of hand with workarounds and memory management issues.
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So I recently finished a rewrite of a website that processes donations for nonprofits. Once it was complete, I would migrate all the data from the old system to the new system. This involved iterating through every transaction in the database and making a cURL request to the new system's API. A rough calculation yielded 16 hours of migration time.
The first hour or two of the migration (where it was creating users) was fine, no issues. But once it got to the transaction part, the API server would start using more and more RAM. Eventually (30 minutes), it would start doing OOMs and the such. For a while, I just assumed the issue was a lack of RAM so I upgraded the server to 16 GB of RAM.
Running the script again, it would approach the 7 GiB mark and be maxing out all 8 CPUs. At this point, I assumed there was a memory leak somewhere and the garbage collector was doing it's best to free up anything it could find. I scanned my code time and time again, but there was no place I was storing any strong references to anything!
At this point, I just sort of gave up. Every 30 minutes, I would restart the server to fix the RAM and CPU issue. And all was fine. But then there was this one time where I tried to kill it, but I go the error: "fork failed: resource temporarily unavailable". Up until this point, I believed this was simply a lack of memory...but none of my SWAP was in use! And I had 4 GiB of cached stuff!
Now this made me really confused. So I did one search on the Internet and apparently this can be caused by many things: a lack of file descriptors or even too many threads. So I did some digging, and apparently my app was using over 31 thousands threads!!!!! WTF!
I did some more digging, and as it turns out, I never called close() on my network objects. Thus leaving ~30 new "worker" threads per iteration of the migration script. Thanks Java, if only finalize() was utilized properly.1 -
Am I the only one who seems to have trust issues when saving code in my text editor? Whenever I want to save I press Ctrl+X+S like 5 times just to be sure.
NB: Ctrl+X+S is equivalent to Ctrl+S in Emacs/Spacemacs1 -
Just had a meeting about performance and monitoring. The main topic of the meeting was to be aware of disk space usage. If there are issues with memory leaks or processor hogging don't worry those are fine, just give it more.1
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Silly question, but why is it that in this age of 64-bit computing and gigabytes of RAM applications still have trouble with text files/SQL dumps over 1MB in size? Surely for something so simple it should be able to store it all in memory without any issues, no?9
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Recoding the malloc is a mess. It seems to be a very good exercise and it is. But you know there are so much mystical issues that happens when you're working with memory.
I just figured out that I got 90% of my free function calls by the "ls" command that was in reality a bad pointer following my own verifications.
So, I don't know why because I just make a normal vérification so except if the "ls" was developer with the ass... -
Currently fixing concurrency issues with a callback which is called so frequently it probably has multiple instances running and which can't ever be paused. Also, it isn't allowed to allocate or free memory. Riddles like this are the reason I got into computer science.
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Visual Studio Code and xdebug: my saviors to finally not have to put up with NuSphere PhpEd constantly shitting itself over memory limit issues in my 3,704 file PHP project.
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so my poor old hp bro is starting to give up on me after 3 years . there are both battery and performance issues. I knew its death was near when i got its keyboard replaced i saw its battery's state 6 months ago. it was fat as me . Now it can't live without the wire for more than 30 mins.
apart from that am getting frustrated with everyday performance of my system. all i open is 50 tabs of chrome and android studio where bitch gradle generates a billion byte sized files at million places and cache folders . (and sometimes a terminal and/or files and/or vscode).
I have decent specs tho i5 7th generation/8gb ddr4 ram/ 2gb nvidea graphics/ 1tb hdd. but still my ubuntu gets stuck everytime i switch between chrome and AS . (maybe i have not made correct swap partitions or maybe there is an issue due to ubuntu/windows dualboot)
what should i do ? I guess i have to spend some shit on a new battery. But apart from that, iwanted to know about performance. how to get a beter performance?
I have heard of solutions like getting an sdd or increasing ram, but am broke af and might not afford a 1tb ssd (yes i do need that much amount of memory, my system is currently at 650 something gb) and about ram i have heard it doesn't offer much improvements. is that true?What should i do?6 -
I actually don't understand why most people like saying bad things about electron-js been a memory hog. I am not denying the fact that it sucks up system resources. Placing all the blame on electron-js is irrational because most apps built untop of electron-js does not hug memory (vscode is a living testimony to that). When you use bloated frameworks and/or libraries you are bound to have memory issues. When you don't understand how to manage memory effectively (in higher level language - you still have to do something for your value to be garbage collected) you are bound to be held captive in the chains of memory consumption.
Don't hate electron8 -
everything is going as planned! :)
Learned Rust Lang. i loved it (that doesn't mean i am done learning na? No! never stop)
new language i could do game memory hacking in without worrying about C++ memory leaks or issues. it also compiles to assembly! another of my favorite languages!
(i use rust for game development and other stuff)
i am not leaving C / C++ though that would be harsh!,
i abandoned javascript for react and typescript.
to be honest the developer just made javascript and left us with a [object Object]
finished learning the android java api so im basically set anything i want to make i can just go on my pc, listen to music and write it out in a couple of days.
well phazor what are you going to do now?!
i will code till i am old.
i will leave my mark like a shid that made its skid in the bowl :)5 -
So Im still a college student but my worst burnout happened a week before finals this year as a sophomore at DigiPen
On the same week, I had to conduct and submit 10 playtests for my competitive Unity game by Friday, submit said game polished and completed on Sunday, finish and submit my team game project that I've been working on the whole year with 10 other people also on Sunday (which we would discover so many TCR submission issues we ended up finally resubmitting on Thursday the following week).
On top of this I had to write a memory manager for my operating systems class due Thursday, a water retainment assignment involving recursive queues for my Data Structures class due Saturday, and to top it all off that class also had a final Thursday when that memory manager was due :'). I don't know how I managed to get OK sleep.
All stuff was due that week so all game teams could have next week before finals to work on submitting, so some CS teachers also move their finals to before that to theoretically distribute the load (which sucks for people in my major because we're almost a double major for CS and Game Design) However my team wanted to submit early to snatch some bonus points but we ended up having to resubmit late anyways :(. Due to the week of hell we were already burned out when trying fix our resubmission.
I love the school and the people in it but there's a reason why our most heard phrase is "I want to die" and no its not just a millenial thing I swear. -
I don't know why but the default settings in Ubuntu have changed quite a lot. There was once a glorious time when if your Ubuntu got stuck, you could press Ctl + Alt + F2-F6, login to a console, run top command to see which process was taking too much time and kill it, and you can go back and start the process and again.
I remember days(~15-20 days) between restarts of my laptop, because I could do that. But now, my Ubuntu gets stuck, and continues to get stuck for about 5-10 mins, and then just restarts.
I have run the disk checks to see if my hard disk is creating issues, but no issues there. Maybe, there are times when the processes execute some buggy code and cannot get out. One fine moment, one of the processes(probably a browser or Eclipse), starts using too much memory or cpu, and the whole worlds seems to be crashing down.
But, my control to kill it promptly without crashing my other applications, was so good to have. And now, every time this happens, I feel 2016-17 and earlier days were so much better.12 -
Another hours wasted on debugging, on what I hate most about programming: strings!
Don't get me started on C-strings, this abomination from hell. Inefficient, error prone. Memory corruption through off by one errors, BSOD by out of bound access, seen it all. No, it's strings in general. Just untyped junk of data, undocumented formats. Everything has to be parsed back and forth. And this is not limited to our stupid stupid code base, as I read about the security issues of using innerHTML or having to fight CMake again.
So back to the issue this rant is about. CMake like other scripting languages as bash have their peculiarities when dealing with the enemy (i.e. strings), e.g. all the escaping. The thing I fought against was getting CMake's fixup_bundle work on macOS. It was a bit pesky to debug. But in the end it turned out that my file path had one "//" instead of an "/" and the path comparison just did a string comparison without path normalization.
Stop giving us enough string to hang ourselves!12 -
A philosophical question about maintenance/updating.
There is no need to repeat the reasons we need to update our dependencies and our code. We know them/ especially regarding the security issues.
The real question is , "is that indicates a failure of automation"?
When i started thinking about code, and when also was a kid and saw all these sci fi universes with robots etc, the obvious thing was that you build an automation to do the job without having to work with it anymore. There is no meaning on automate something that need constant work above it.
When you have a car, you usually do not upgrade it all the time, you do some things of maintance (oil, tires) but it keeps your work on it in a logical amount.
A better example is the abacus, a calculating device which you know it works as it works.
A promise of functional programming is that because you are based on algebraic principles you do not have to worry so much about your code, you know it will doing the logical thing it supposed to do.
Unix philosophy made software that has been "updated" so little compared to all these modern apps.
Coding, because of its changeable nature is the first victim of the humans nature unsatisfying.
Modern software industry has so much of techniques and principles (solid, liquid, patterns, testing that that the air is air) and still needs so many developers to work on a project.
I know that you will blame the market needs (you cannot understand the need from the start, you have to do it agile) but i think that this is also a part of a problem .
Old devices evolved at much more slow pace. Radio was radio, and still a radio do its basic functionality the same war (the upgrades were only some memory functionalities like save your beloved frequencies and screen messages).
Although all answers are valid, i still feel, that we have failed. We have failed so much. The dream of being a programmer is to build something, bring you money or satisfaction, and you are bored so you build something completely new.13 -
Compare and harmonize the web configs
Oh no someone set execution timeouts to 14 days
Fuck fuck fuckity duck
Hey compare all the web configs of all environments and harmonize them all wtf cmon bruh do your job as a developer
Take them and back them up into svn. What do you mean svn isn't a back up system of course it is well its the only thing we have fuck
What do you mean we have shit logging where people will catch an exception and only print the word exception in the log you can figure it out can't you we have live produxtion issues that hace to be solved now what the fuck
How dare you make a. Mistake copying our shitload of a bloated codebase and configuring our 100s of different options all by fukcing hand what the fuck dude do yoh write anyrhing down?
Please catalogue all the exception mails we are getting but we have no db or error reporting system so they all just plop into tue inbox and thats all ypur fuckjng data figure it out kid
This is a rewarding, fulfilling job whwrw you can be both dev ops and a developer and manage all of our fucking environments of which there are about 15 of all your own with no sort of tool or software to aid you because haha what the fuck we wouldn't make your life easy
Whata that you want to spend time to write stuff or change stuff that will nake it easier fot you fuxk that bruh get back to your biklable tasks like holy shit you thjnk this is a charity ofr aomw shit
Live production issues
Live production issues
Produxtion issues. A ghost in the machine. Find it fix if find it fix it find it fix it cmon why can't you fix it I expect you to spend your day hopelessly pretending to try to solve something you fucker
One of the only peopel able to help you sometimes though hes a bit of an old laxky, yeah hea fucking leaving see ya seeya kid and now we're not hirinf anyone to fuckjng help you no no no managing and monitoring the environments its your jov alll fof them every sngle on do you knkw all the xonfiguraiton values for them yet??
Instead we are hiring a new sales person to fucking make us some more money and we don't need naother seceloper to help you infqct lets have you use this mid end retail computer from 2014 to develop on yeah yeah oh but all our shitty code and visual studip will destry your memory but too bad!! Hahahahahdhsj
Go lice is all you, why sare you so slow
How long will it take
How long will it take
How long will it take
How long witll it tqk2
How long will it take holy shit
Give time estimate for sonethign that I don't fucking know how about it will tqke till fuxk you oxloxk4 -
Python muses me sometimes.
Gunicorn has a preload mode. It enables forking...
So Gunicorn starts, when Gunicorn loaded it forks the workers (Uvicorn / FastAPI in my case).
https://github.com/tiangolo/...
So if we add a function that creates the app... this function will be executed before forking, thus the memory at the state of creating the app will be duplicated.
You can thus spawn 40 workers, they would all have the same ML models.
Or in my case a client who does some things that should only be run by a single thread (with locking).
So the client has a cache, as long as I load the cache during the create_app phase, the cache will be shared between all instances and not created per instance.
It's ... Such a small detail. So simple.
Yet completely fucks my brain.
It's logical, yes. I understand what it does, yes.
But it still makes my brain fart. -
I wasted fukcing 30 minutes to find out the right editor for plantuml on os x. I do not like atom because it eats up memory, and brackets was not ready to install plantuml extension. in the end, I used atoms to finish a five minute job. #FML
It seems, mostly we waste our time in deciding which weapon to use !!! Any one who faced the same issues ???2 -
Had to face the music and make the jump from Ubuntu 22.04 to Fedora 36. Am I have to say it’s been night and day so far. Everything is snappier. Yeah dnf is very slow in comparison to apt but there’s changes you can make to speed things up and the nifty terminal interface is a great change and helps to make up for the speed issues.
Came with Python 3.10 installed, Gnome and gtk4 apps are nice, fluid and up to date and the random slowdowns, freezing and restarts of Ubuntu running the version of Gnome are nonexistent.
For the life of me I can’t see why Ubuntu would drop the ball like this. I have a Dell XPS 13 developer edition and this is the best it’s ever ran. Even wifi connectivity is better despite of the crap WiFi card that ships with this machine.
I want to love this version and while it is the most graphical appealing and functional version of Ubuntu I’ve ever used. The memory management issues make it damn near unusable.9 -
!rant
can you give me/point me to some good example problem/exercise for multithreading? as in, something that's small in scope, but actually requires dealing with most of the multithreading issues & complications? race conditions, synchronization, locks, shared memory access, cross-thread calls/callbacks, etc?2 -
Okay, so I had an object consisting of tables (basically classes) and structs (classes with only scalars as their properties).
I was about to serialize the object with vectors of classes and structs and wrote some nice tests for it wondering why they fail to validate the data after deserialization and why I only got garbage for the vectors of structs whilst the tables worked just fine.
Turns out there is an undocumented function called CreateVectorOfStructs which shall be used for structs instead of the regular CreateVector ...
There go three hours of blaming memory issues and running Valgrind over and over again ...
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