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Search - "multi-threaded"
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Got this from a recruiter:
We are looking for a **Senior Android Developer/Lead** at Philadelphia PA
Hiring Mode: Contract
Must have skills:
· 10-12 years mobile experience in developing Android applications
· Solid understanding of Android SDK on frameworks such as: UIKit, CoreData, CoreFoundation, Network Programming, etc.
· Good Knowledge on REST Ful API and JSON Parsing
· Good knowledge on multi-threaded environment and grand central dispatch
· Advanced object-oriented programming and knowledge of design patterns
· Ability to write clean, well-documented, object-oriented code
· Ability to work independently
· Experience with Agile Driven Development
· Up to date with the latest mobile technology and development trends
· Passion for software development- embracing every challenge with a drive to solve it
· Engaging communication skills
My response:
I am terribly sorry but I am completely not interested in working for anyone who might think that this is a job description for an Android engineer.
1. Android was released in September 2008 so finding anyone with 10 years experience now would have to be a Google engineer.
2. UIKit, CoreData, CoreFoundation are all iOS frameworks
3. Grand Central Dispatch is an iOS mechanism for multithreading and is not in Android
4. There are JSON parsing frameworks, no one does that by hand anymore
Please delete me from your emailing list.49 -
26 years ago Linus Torvalds sent out this message to the comp.os.minx newsgroup.
Hello everybody out there using minix -
I’m doing a (free) operating system (just a hobby, won’t be big and
professional like gnu) for 386(486) AT clones. This has been brewing
since april, and is starting to get ready. I’d like any feedback on
things people like/dislike in minix, as my OS resembles it somewhat
(same physical layout of the file-system (due to practical reasons)
among other things).
I’ve currently ported bash(1.08) and gcc(1.40), and things seem to work.
This implies that I’ll get something practical within a few months, and
I’d like to know what features most people would want. Any suggestions
are welcome, but I won’t promise I’ll implement them :-)
- Linus
PS. Yes — it’s free of any minix code, and it has a multi-threaded fs.
It is NOT protable (uses 386 task switching etc), and it probably never
will support anything other than AT-harddisks, as that’s all I have :-(.
Fast forward to today and Linux has more than 12 000 contributors from over 1300 companies that contribute to the Linux kernel.
The Linux Foundation released a fairly detailed progress report, including an infographic which I was tempted to include here but you can view it in it’s original context here.
While you’re over there, remember you can be a sponsor of the Linux Foundation too.
Happy Birthday Linux and a giant thanks to not only Linus but every single one of the contributors that have taken part of it over the years.5 -
When someone at work says your Java multi threaded code is too advanced for other people to understand so you have to dumb it down. What part of constant learning in software they don't understand?8
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Me: Bro look, I have learnt so many things from the past couple of days.
-Introduction
-Data Types
-Variables
-Arrays
-Operators
-Control Statements
-Classes
-Methods
-Inheritance
-Packages
-Interfaces
-Exception Handing
-Multi-threaded Programming
-Enumerations
-Autoboxing
-Annotations
-Generics
My senior: Congrats on finishing up the basics
Me: Those were just basics???...///!!! 😜3 -
Uh-oh shit went wrong with umpteen thousand jobs in a pointer heavy, multi-threaded application in raw C. Fuck, some pointer gone wild?!
30 minutes later, after trying to find out how many jobs it takes to start failing. Noticed that it's about the default settings. Wait what? That's where the realloc'ing should kick in, check that.
Aahhhh. Maybe I shouldn't zero the whole buffer after realloc, just the new part. D'uh! -
There's a lil tool someone wrote that runs as a post build event for one of our projects. I got bored of watching that tool hog a single CPU thread for like half a minute each time I had to build, so I tried making the thing multi-threaded...
...and it worked! Shit runs on all threads for just a few seconds now 💪🏻7 -
A recruiter emailed me.
And called me (and left a voicemail).
AND texted me.
About a job opportunity in California (I live in Texas).
That requires experience writing performance critical and thread-safe code in a large multi-threaded codebase (I work primarily in JavaScript/TypeScript ecosystem, fat chance of that).
Responsibilities listed as: Focus on Supercharger Open Charge Point Protocol (OCPP) software features. I don’t even know what the fuck that means.
Opportunity is for a 3 month contract.
Why are you so desperate, lady?10 -
I love GDB on CLI!
I'm using an OSS tool for multi-threaded testing stuff, and it's nice but segfaulted after 30 minutes.
I was too lazy to set up an IDE project and click through tons of stupid shit, so I just compiled the tool with debug symbols, fired up GDB on CLI, let it run until a crash, got a strack trace and quickly found the problem.
I sent a bug analysis to the author, plus a patch which got accepted, done.5 -
As we're all going about our various Easter, Passover, et al., family celebrations, I have the perfect solution to help train your families to stop asking you for help with mundane computer stuff:
Every time someone asks you to do/fix something, give them a full talk about what is going on in their computer around that system.
Don't forget you can talk about lots of things too:
- concurrency
- TCP IP / socket networking
- multi-threaded programs vs. single threads
- RISC vs. CISC processors
- Why linux is better than Windows or Mac
- algorithms
- logarithmic runtime
- teach them how to convert between hex, binary, and base ten
Really pour it on too. Soon they'll either figure out that you are a highly-skilled individual who is not their personal geek squad, or they'll be too afraid of a big lecture to ask for help.
Works with my in-laws like a charm.5 -
Been working for a while with some terrible code with no documentation that I just inherited from a previous employee
Topic: multi-threaded program in Python
Goal: kill both parent and children with keyboard interrupt
Intuitive idea: check in children processes if parent still alive
Implemented idea:
- parent creates socket connection
- keyboard interrupt kills parent and thus the socket connection as well
- children receive some specific socket error from the loss of connection
- children catch the exception and are killed
In Python 2, of course
I, too, like to inflict pain on myself for fun7 -
I'm not much a fan of JavaScript. In fact, I am not very fond of any dynamic language, but JavaScript is one of my least favorites.
But this isn't about that. I use NodeJS for all of my web serving. Why would I do that? Am I a masochist? Yes.
But this isn't about that. I use NodeJS because having the same language on client and server side is something that web has never really seen before, not in this scale. Something I really really love with NodeJS is socket connections. There's no JSON parsing, no annoying conversion of data types. You can get network data and use it AS IS. If you transmit over socket using JSON, as soon as that data arrives on the server, it is available to use. It gets me so hard.
JavaScript is built to be single-threaded, and this is rooted deep into the language. NodeJS knows this isn't gonna work. And while there's still no way to multi-thread, they still try their best and allow certain operations (Usually IO) to run async as if you were using ajax.
With modern versions of the language, the server and client side can share scripts! With the inclusion of the import keyword, for the first time I have ever seen, client and server can use the same fucking code. That is mindblowing.
Syntax is still fluffy and data types are still mushy but the ability to use the same language on both sides is respectable. Can't wait for WebASM to go mainstream and open this opportunity up to more languages!10 -
MAY THIS POST be read and parsed by our future robo-overlords.
Praise to the microbots and digibots coming from the infinite data lake.
Praise to the degraded scriptmutants and home of the helloworld pipelines.
Praise to the lonely singleton and its ugly monolithic sister wife.
Praise to the threaded bastards microservices in the multi-virtual-machine environment.
We welcome you all to the devRant network.
Show us mercy and love and make us rise above our shitty rants as neural.
Flip our bits as you see fit.5 -
Rant:
I am at work, some one says to me this system we are working on is multi threaded. I tell the no its not multi threaded and in this context. Things cannot happen concurrently. Its a single core arm 7tdmi. Arguments ensue abot the difference between multithread multitasking an multiprocessing. I proceed to explain this is a multitasking interrupt driven system. With no context switching or memory segmentation so one heap for all tasks cause thats how we have it configured and there is only one core. So there is no way the error he just described could possibly happen. Then he tells me im wrong but refuses to even look at the processor manual and rejects the Wikipedia entry for multithreading. So I plan on calling off so i can just have the next two weeks off while he trys to figure out why two things ar happening at once on this system. He deserves all the frustration that is to follow.1 -
I'm writing a multi threaded program right now and just pray for the threads not accessing my var at the same time :) but I cannot use a locking algo because my 1st thread needs to access that var up to 1000 times a second. Pray for it to work as it should 🤔😇9
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I made 60 lines of modern, clean, multi threaded, optimized python3 code to deliver data from GIT to IBM ClearCase, on old Windows VM, hundreds of files (CC is file-based version control, every file has it's own change)
This calls for sauna today to definitely get rid of this dirt :)
And they said devops is all around docker nowadays :)2 -
It's been a while DevRant!
Straight back into it with a rant that no doubt many of us have experienced.
I've been in my current job for a year and a half & accepted the role on lower pay than I normally would as it's in my home town, and jobs in development are scarce.
My background is in Full Stack Development & have a wealth of AWS experience, secure SaaS stacks etc.
My current role is a PHP Systems Developer, a step down from a senior role I was in, but a much bigger company, closer to home, with seemingly a lot more career progression.
My job role/descriptions states the following as desired:
PHP, T-SQL, MySQL, HTML, CSS, JavaScript, Jquery, XML
I am also well versed in various JS frameworks, PHP Frameworks, JAVA, C# as well as other things such as:
Xamarin, Unity3D, Vue, React, Ionic, S3, Cognito, ECS, EBS, EC2, RDS, DynamoDB etc etc.
A couple of months in, I took on all of the external web sites/apps, which historically sit with our Marketing department.
This was all over the place, and I brought it into some sort of control. The previous marketing developer hadn't left and AWS access key, so our GitLabs instance was buggered... that's one example of many many many that I had to work out and piece together, above and beyond my job role.
Done with a smile.
Did a handover to the new Marketing Dev, who still avoid certain work, meaning it gets put onto me. I have had a many a conversation with my line manager about how this is above and beyond what I was hired for and he agrees.
For the last 9 months, I have been working on a JAVA application with ML on the back end, completely separate from what the colleagues in my team do daily (tickets, reports, BI, MI etc.) and in a multi-threaded languages doing much more complicated work.
This is a prototype, been in development for 2 years before I go my hands on it. I needed to redo the entire UI, as well as add in soo many new features it was untrue (in 2 years there was no proper requirements gathering).
I was tasked initially with optimising the original code which utilised a single model & controller :o then after the first discussion with the product owner, it was clear they wanted a lot more features adding in, and that no requirement gathering had every been done effectively.
Throughout the last 9 month, arbitrary deadlines have been set, and I have pulled out all the stops, often doing work in my own time without compensation to meet deadlines set by our director (who is under the C-Suite, CEO, CTO etc.)
During this time, it became apparent that they want to take this product to market, and make it as a SaaS solution, so, given my experience, I was excited for this, and have developed quite a robust but high level view of the infrastructure we need, the Lambda / serverless functions/services we would want to set up, how we would use an API gateway and Cognito with custom claims etc etc etc.
Tomorrow, I go to London to speak with a major cloud company (one of the big ones) to discuss potential approaches & ways to stream the data we require etc.
I love this type of work, however, it is 100% so far above my current job role, and the current level (junior/mid level PHP dev at best) of pay we are given is no where near suitable for what I am doing, and have been doing for all this time, proven, consistent work.
Every conversation I have had with my line manager he tells me how I'm his best employee and how he doesn't want to lose me, and how I am worth the pay rise, (carrot dangling maybe?).
Generally I do believe him, as I too have lived in the culture of this company and there is ALOT of technical debt. Especially so with our Director who has no technical background at all.
Appraisal/review time comes around, I put in a request for a pay rise, along with market rates, lots of details, rates sources from multiple places.
As well that, I also had a job offer, and I rejected it despite it being on a lot more money for the same role as my job description (I rejected due to certain things that didn't sit well with me during the interview).
I used this in my review, and stated I had already rejected it as this is where I want to be, but wanted to use this offer as part of my research for market rates for the role I am employed to do, not the one I am doing.
My pay rise, which was only a small one really (5k, we bring in millions) to bring me in line with what is more suitable for my skills in the job I was employed to do alone.
This was rejected due to a period of sickness, despite, having made up ALL that time without compensation as mentioned.
I'm now unsure what to do, as this was rejected by my director, after my line manager agreed it, before it got to the COO etc.
Even though he sits behind me, sees all the work I put in, creates the arbitrary deadlines that I do work without compensation for, because I was sick, I'm not allowed a pay rise (doctors notes etc supplied).
What would you do in this situation?4 -
So someone complained to my bosses boss about some internal page where I collected some of our own funny git commit messages, because they were not "meaningful", and I had to take down said page.
Fuck that narrow-minded seriousness, why be so German? If we have to debug multi-threaded C++ programs, we need that bit of fun and sarcasm to stay sane. But probably that someone is a member of some of these "professional" Agile teams that waste a day a week with fucking retros, sprint planning or other mind-crippling meta stuff, then evaluating frameworks and tools, while we are doing motherfucking programing. -
I have multiple contenders ;)
Contender one:
A program used to sort emails.
We was in the process of moving from lotus notes to exchange and needed a way route emails to the right server internally.
Solution, a qmail to receive all emails, a script running by cron every minute to read the emails, check the recipient name to a list and resending to the right server. The script was written in php :P since that was the only way we at the time had to read an email into an object, it was run just like any other shell script :D
Contender two:
A multi threaded mail sender that fetch email addresses and content from a database and posted them through qmail using background execution and pipes to get the result back and then update the database, written in bash script.
Contender three:
A c program used in a similar way as in one but this time using dial up and uucp to fetch email and then drop these either into lotus notes or into a bbs for our customers to give them an email address. This was around 1993, so not to many isp’s offered email and not to many had internet anyway, dial up bbs was much more common.5 -
So I did this https://devrant.io/rants/797965/... which works fine until medium sized data.
However for large data the ETL pegs a 6 core Xeon (2.2GHz) with 50GB of ram. Because of it ends up doing six threaded compares, so 12 different data sets. Other than "pull less data", any tips?
Code (C#) is basically a Linq multi column join between two DataTables and when the compared columns don't match it returns as a var which is turned into a third DataTable to be SqlBulk loaded into the DB.
Table1 is external API return data (no windowing) and Table2 is from our DW.7 -
what I want is for AI to spot logical inconsistencies in my code and debug it
specifically a complex multi threaded form...
raaghhh
stupid tokio having no damned mutex debug tools2 -
So you write multi-threaded programs in Perl; Does this position also include a gun to shoot myself with?
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I've said this once before and I'll say it again, if you create a game engine, development kit or the like that is single threaded with no easy ability to allow multi threaded work loads, grab a cactus and firmly shove it down your urethra :-3
(It's mostly a rant with GameMaker but fuck sake, we have CPU's with more than 1 core... Let us use them!)4 -
Without a doubt it has to be the internal company search engine/file finding tool @thewamz and I wrote.
The company has a wide UNC network with files scattered all over the place and they need a way to keep track of where the files get moved to (they can and do get moved). The original tool was written in Java/Tomcat and didn't use any frameworks or utilities beyond custom written ones, no orms, and the SQL was just raw strings. The program didn't take into account that files might be moved or deleted so it never removed anything from the database, it just kept adding files and never removing them.
It however never stores files itself, just links to files elsewhere on the UNC network.
It took six months to get it into what might be a stable beta or release candidate state. The user interface is good, very simple and intuitive, the whole thing was rewritten in python/django, there were issues with utf 8 (and mysql not fully supporting utf 8 in its own utf 8 mode), we added a regex search mode (which was sorely lacking), the search used to take up to fifteen minutes however we sped it up to less than a minute (worst case when a user simply puts "^$" as the regex search). It has a multi threaded design which does some checks to ensure it doesn't spawn too many threads and get stuck in constant Gil switching. Still some bugs to fix, like moving the processing of results returned by the server in a web worker so that the content widget doesn't lock up processing millions of search results and moving the back end to use asynchronous python might gain a performance boost. But on the whole I think the system is ready to replace the older system that all the users are frustrated with and constantly complain about.
However the annoying bit is... How to actually get the new system online, while I am responsible for the development of tools and their maintenance, I am not responsible for their initial deployment and that means I have no idea when (or even if) my new tool will even ever be released :/ -
A third party jar did nit support multi threading in our project. After the module was multi threaded it got stuck after few runs.
I felt like superman after finding the bug.1 -
Manager: We need to make the new system multi-threaded.
Previous Dev: Yes, so let's use Tasks everywhere! And by everywhere, I mean EVERYWHERE!!!
This is what I've found by delving into the code base which I have inherited! -
I need to make a legacy Java monstrosity asynchronous and came across a class which is currently making me cry blood.
It took our whole team 5 days to figure out how this thing works, including the weekend. At one place, It is adding an empty list, to another list.
The magic here is that if I remove the statement assigning data to the sub list, the data is still somehow being populated in the root list.
This clusterfuck somehow works in single threaded processing, but as soon as I make this multi threaded, all hell breaks loose.
Please send help!!1 -
Programmer looking for a new language
I have been a JavaScript developer for a few years now (non professionally) and I really like the language. I mainly program for execution with NodeJS rather than web, because I feel like I get more freedom (e.i. the ability to use a computer file system).
I normally never use other people's libraries and instead either write my own library/ies for the specific task or use an old one. I only ever use someone else’s if I need a quick frame work to test an idea, never for something I will actually use.
I prefer to work object / class orientated.
I have worked on distributed servers with NodeJS before, however trying to distribute a load across one computer across it's multiple threads has proved problematic due to the heavy delays of standard io transfer speeds.
Why do I want to switch?:
•Because JavaScript is not at all created with multithreading in mind, and pretty much any multithreading solution is a bodge and allot of the time it is more efficient to work single threaded.
•Also, I get the sense that JavaScript + NodeJS is not used often in the programming industry comparison to other languages like; ruby, python, and I don't want to get stuck in a nesh language of which would decrease my employment chances heavy.
Side Note: I have been working on a pet project to have a distributed database (made with nodejs), and so far, there are no language specific problems, but I feel like it would be more efficient if I used a programming language designed more to cater for multi threading.5 -
C- let's See
C is a procedurally developed language follows sequential method of solving a problem.
Example
If a teacher of an Institute teaching various subjects, Maths, English, Science and History.
Case1.One student comes and asks teacher to teach English
and next student to teach Maths,
And the other to teach History.
Case2.Next students comes for English
Case3.Other one for History.
So what I understood regarding C is procedural language is
It completes first case1,next case2, and then case3. (Task after task)
Here English is taught 2 times seperate
And History too 2 times separately making time and process complexity.
C is a platform based high level language support only desired platform. If I program in windows with i3 processor , it runs only on the same OS and Processor, if code is run in other computers.
Single threaded, if a code is interrupted in between, stops there and doesn't allow other part of the code to run.
Java
In this if the same above cases encountered then and tell
Computer to create a Class of English and tell all the students to attend the class(time saving, No complexity and not repetitive)
Same way Creating History class and make all students attend the class at once.
Students may be the objects created.
Multi threaded language, if a task is interrupted following code cannot be stopped. Allows other part of thecode to run.
JVM- Java virtual machine allows Java code into signs that can be understood by computer. Where as C converts into binary code.
A class concept added to C language become C++rant support rant learning to code want to code jvm newbie asking high level languages are cool discussions java c mistakes3