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The most popular blog posts about systems & performance on Hacker News. 4,390 posts.
TL;DR This doesn’t mean that the scheduler can’t use more than 8 cores. The scheduler controls how to allocate tasks to available cores. How to schedule particular workloads efficiently…
Back in January, the ThunderScope team sent me a PCIe card version of their prototype open hardware oscilloscope.
FatELF is a file format that embeds multiple ELF binaries for different architectures into one file. This is the Linux equivalent of what Mac OS X calls "Universal Binaries."
Project community server: https://discord.gg/side7 On September 20th, 2022, the live-service first-person hero shooter "GUNDAM EVOLUTION" was launched. A little over a year later, on November 29th, 2023, it abruptly reached its end of life. As a passionate enthusiast of hero shooters and the Gundam franchise, the…
One like, one unpopular opinion is one of them top Twitter games, innit?
I’ve been experimenting with different approaches to running code in a sandbox for several years now, but my latest attempt feels like it might finally have all of the characteristics …
Edit 2017/12/10: So I screwed up, I thought I was safe confirming it in two different ways but I was using an external monitor and all of the below is accurate only for a specific multi-monitor case. Skip to the bottom to read about my new results.
Blog about Ubuntu from a kernel engineer
The challenge, simulate millions of particles in golang, multi-player enabled, cpu only, smart tv compatible.
A lot of people seem to think that distributed tracing isn't useful, or at least not without extreme effort that isn't worth it for companies smaller than FB. For example, here are a couple of public conversations that sound like a number of private conversations I've had. Sure, there's value somewhere, but it costs…
Memory management is the heart of operating systems; it is crucial for both programming and system administration. In the next few posts I'll cover memory with an eye towards practical aspects, but wi
After failing to find good papers about distributed systems testing for many months, yesterday I asked a question in Twitter:
This paper is from SOSP'13. The Polyjuice paper, which we studied last week, built on the Silo codebase and commit protocol, which led me ...
I’m hacking on an assembly project, and wanted to document some of the tricks I was using for figuring out what was going on. This post might seem a little basic for folks who spend all day heads down in gdb or who do this stuff professionally, but I just wanted to share a quick intro to some tools that others may…
In 1978, Intel introduced the 8086 processor, a revolutionary chip that led to the modern x86 architecture. Unlike modern 64-bit processors,...
Things that interest me
Below is the first draft list of papers I plan to discuss in my distributed systems seminar in the Spring semester. If you have some suggest...
Parallel sequential scan is the first parallel access method in PostgreSQL and is introduced in version 9.6. The committer of this featu...
The Linux kernel has a feature where you can tune the behavior of memory allocations: the vm.overcommit_memory sysctl. When overcommit is enabled (sadly, this is the default), the kernel will typically return a mapping when brk(2) or mmap(2) is called to increase a program’s heap size, regardless of whether or not…
As I tend to do, I picked a topic to write about that is much larger in scope than I could manage in a reasonable amount of time. Did I learn? Apparently...
The common way of deleting files and folders in Windows is via Windows Explorer (a.k.a. File Explorer ). This method is perfectly acceptable under normal circumstances, but becomes a real drag when dealing with large and complex folder structures. There is, in fact, a significant amount of of overhead when you trigger…
Robert O'Callahan. Christian. Kiwi. Software guy. All content human-authored unless otherwise noted.
I learn a non-trivial number of things, because there’s Debian drama about them. The fact that the which command is not part of any standard just joined the flock.
The answer is "very often"
Persisting state between AWS EC2 spot instances using Docker on an external volume
