Hacker News with Generative AI: Concurrency

Linux 6.13 Quadrupling Workqueue Concurrency Limit (phoronix.com)
The Linux kernel Workqueue (WQ) is used for handling asynchronous process execution. For the past many years there has been an upper limit on the number of workqueue execution contexts per CPU at 512, but with Linux 6.13 that is being quadrupled to a limit of 2048.

Linux Kernel, Operating Systems, Performance, Concurrency

3 points by mikece 2 days ago | 0 comments

Playground Wisdom: Threads Beat Async/Await (pocoo.org)
It's been a few years since I wrote about my challenges with async/await-based systems and how they just seem to not support back pressure well. A few years later, I do not think that this problem has subsided much, but my thinking and understanding have perhaps evolved a bit. I'm now convinced that async/await is, in fact, a bad abstraction for most languages, and we should be aiming for something better instead and that I believe to be thread.

Programming, Asynchronous Programming, Threads, Concurrency

38 points by samwillis 3 days ago | 19 comments

GenMC: Model checking for concurrent C programs (mpi-sws.org)
GenMC is an open-source state-of-the-art model checker for verifying concurrent C/C++ programs under the RC11, IMM, and LKMM memory models.

Software, Programming, Model Checking, C Programming, Concurrency

61 points by todsacerdoti 11 days ago | 3 comments

We built a self-healing system to survive a concurrency bug at Netflix (pushtoprod.substack.com)
Our CPUs were dying, the bug was temporarily un-fixable, and we had no viable path forward. Here's how we managed to survive.

Software Engineering, Netflix, System Design, Concurrency, Debugging

344 points by zdw 13 days ago | 165 comments

Bthreads: A Simple and Easy Paradigm for Clojure (thomascothran.tech)
Asynchronous programs are hard to reason about. But is this intrinsic to asynchrony? Or might we be using the wrong paradigms?

Clojure, Programming Languages, Asynchronous Programming, Concurrency

85 points by refset 15 days ago | 9 comments

Understanding Ruby 3.3 Concurrency: A Comprehensive Guide (bestwebventures.in)
Ruby 3.3, released with significant improvements in concurrency capabilities, marks a pivotal shift in how Ruby applications handle parallel processing and concurrent operations.

Ruby, Programming Languages, Concurrency, Software Development

63 points by ksec 15 days ago | 16 comments

Show HN: Whirlwind – Async concurrent hashmap for Rust (github.com/fortress-build)

Rust, Hashmaps, Concurrency, Show HN

140 points by willothy 16 days ago | 54 comments

Futexes in TLA+ (surfingcomplexity.blog)
Justine Tunney recently wrote a blog post titled The Fastest Mutexes where she describes how she implemented mutexes in Cosmopolitan Libc.

Operating Systems, Programming, Software, Concurrency

43 points by ingve 44 days ago | 1 comments

Go Concurrency vs. RxJS (gdnetwork.co)

Concurrency, JavaScript, Go

44 points by kermerlerper 48 days ago | 52 comments

The Watermelon Operator (matklad.github.io)
In these two most excellent articles, https://without.boats/blog/let-futures-be-futures and https://without.boats/blog/futures-unordered, withoutboats introduces the concepts of “multi-task” and “intra-task” concurrency.

Programming, Concurrency

12 points by Gadiguibou 57 days ago | 0 comments

An Overview of C++26: Concurrency (modernescpp.com)
Today, I will finish my overview of C++26 and write about concurrency.

C++, Programming Languages, Concurrency

10 points by jandeboevrie 64 days ago | 0 comments

Understanding Concurrency, Parallelism and JavaScript (rugu.dev)
Up until now, I was not aware that concurrency and parallelism were actually different things since they are often used interchangeably by some. I just learned that this is not the case while reading Chapter 9 of the book “Clojure for the Brave and True.”

Concurrency, Parallelism, JavaScript, Programming

100 points by kugurerdem 73 days ago | 26 comments

Show HN: Asyncpal: Preemptive concurrency and parallelism for sporadic workloads (github.com/pyrustic)

Concurrency, Parallelism, Programming, Python

28 points by alexrustic 83 days ago | 8 comments

JEP Draft: Adapt Object Monitors for Virtual Threads (openjdk.org)

Java, Programming Languages, Concurrency, Virtual Threads

27 points by mfiguiere 91 days ago | 2 comments

The Syndicated Actor Model (syndicate-lang.org)

Programming Languages, Concurrency, Distributed Systems

168 points by sph 99 days ago | 43 comments

Rust Atomics and Locks (2023) (marabos.nl)