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Why is this site built with C
Most of what I have written features in the category of notes-to-self. Mostly on how to do A or B.
Top posts
Every blog post that took off on Hacker News, ranked by the votes of its best submission. 6,947 posts.
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Epoll is fundamentally broken
This time we'll focus on Linux's select(2) successor - the epoll(2) I/O multiplexing syscall.
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Latency/throughput tradeoffs, illustrated with coffee
You’re making morning drip coffee. You need to make 2 cups. Do you:
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Unix as a tool forge and how Emacs fits in Unix philosophy
Wikipedia cites a few different sources on what “Unix Philosophy” is. Peter Salus summarizes it as:
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GCP, AWS, and Azure ARM-based server performance comparison
Compare ARM cloud server network performance using Apache APISIX as an API Gateway benchmark workload across AWS, Google Cloud, Azure, and Oracle Cloud.
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Fedora 26 released
[This message comes from the desk of the Fedora Project Leader directly. Happy release day! — Ed.] Hi everyone! I’m incredibly proud to announce the immediate availability of Fedora 26. Read more below, or just jump to download from: Get Fedora 26 Workstation Get Fedora 26 Server Get Fedora 26 Atomic Host ← includes…
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CUDA Grep
CUDA grep : Manish and Brandon's 15418 final project
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Oboe: A C++ library for low latency audio in Android
This week we released the first production-ready version of Oboe - a C++ library for building real-time audio apps. Oboe provides the lowest possible audio latency across the widest range of Android devices, as well as several other benefits.
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Decommissioned mobile devices as cheap energy-efficient compute nodes
The performance of mobile phone processors has been steadily increasing, causing the performance gap between server and mobile processors to narrow with mobile processors sporting superior performance per unit energy. Fueled by the slowing of Moore’s Law, the overall performance of single-chip mobile and server…
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Tornado Without a GIL on PyPy STM
This post is by Konstantin Lopuhin, who tried PyPy STM during the Warsaw sprint. Python has a GIL, right? Not quite - PyPy STM is a python ...
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What a one line change did to the Chrome sandbox
Posted by James Forshaw, Project ZeroThe Chromium sandbox on Windows has stood the test of time. ...
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Reducing power consumption for background tabs
Efficient power usage is an important aspect of speed, one of Chrome’s key pillars . To prolong battery life, Chrome should minimize power ...
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How Netflix Accurately Attributes eBPF Flow Logs
By: Cheng Xie, Bryan Shultz, and Christine Xu
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Booting Windows NT 4 on a DEC Multia
The Multia feels to me like Digital’s take on a high-end “legacy-free” (at introduction in late 1994) desktop. Its spec sheet includes features unheard of in its contemporaries:
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Another Vulnerability in the LPC55S69 ROM
The discovery of an undocumented hardware block in the LPC55S69.
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ReactOS 0.4.11 Released
ReactOS is a free, opensource reimplementation of windows
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Facebook Trains ImageNet in 1 Hour
Facebook published a paper today detailing how they are able to train nearly 1.3 million images in under an hour using 256 Tesla P100 GPUs that previously took days on a single system.
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Runtime code generation and execution in Go
Disclaimer: I won’t expand on why/when you want to do this kind of hack, and you should not do this unless you know exactly what you are doing. Everything I talk about here is completely unsafe and might not be accurate for the future Go versions. This is not a recommendation, but more of a fun story.
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Surprising economics of load-balanced systems
I have a system with c servers, each of which can only handle a single concurrent request, and has no internal queuing. The servers sit behind a load balancer, which contains an infinite queue. An unlimited number of clients offer c * 0.8 requests per second to the load balancer on average. In other words, we increase…
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How Algolia Built Their Realtime Search as a Service
Algolia started out as a mobile SDK for apps that wanted better offline search. After customers starting asking for a hosted search product, they quic
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The Fil-C Optimized Calling Convention
Fil-C achieves memory safety even for programs that behave adversarially. That includes casting function pointers to the wrong signature and then calling them, exporting a function with one signature in one module and then importing it with a different signature in another, or even exporting a symbol as a function in…
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Improving Network Performance with Linux Flowtables
We’re building an open source alternative to AWS. For IPv4 assignment and firewall rules, we use Linux’s Netfilter / Nftables. This subsystem provides a powerful way to handle packets addressed to the host. We recently came across flowtables - a network acceleration feature in the Linux kernel that works like a…
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Transaction Isolation in Postgres
Ever dealt with glitches in a SaaS platform where your actions don't seem to sync up? That's often a transaction isolation issue in databases. Lets talk about transaction isolation and how they work in Postgres, so you can write reliable and performant code with minimal headache.
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I.MX7 M4 Atomic Cache Bug
Hardware Bugs can be frustrating, as they are likely the last place you would expect a bug. Unfortunately, they can and do happen. Most likely every CPU has a list of erratas. This post outlines th…
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What's worked in Computer Science: 1999 vs. 2015 (2015)
In 1999, Butler Lampson gave a talk about the past and future of “computer systems research” . Here are his opinions from 1999 on "what worked".