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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.
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 205 posts.
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Another Vulnerability in the LPC55S69 ROM
The discovery of an undocumented hardware block in the LPC55S69.
123
Jepsen: Radix DLT 1.0-Beta.35.1
Radix DLT (Distributed Ledger Technology) is a distributed ledger: a serializable log of transactions over a state machine, along with mechanisms for querying that state. Throughout this report, “Radix” refers to the Radix DLT software .
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Transcending Posix: The End of an Era?
In this article, we provide a holistic view of the Portable Operating System Interface (POSIX) abstractions by a systematic review of their historical evolution. We discuss some of the key factors that drove the evolution and identify the pitfalls that make them infeasible when building modern applications.
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Improving NGINX Performance with Kernel TLS and SSL_sendfile
Deliver modern applications with NGINX. Explore high-performance load balancing, API gateways, and web server solutions trusted by top global enterprises.
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Making Your Game Go Fast by Asking Windows Nicely
How to stop Windows throttling your game, set DPI awareness programatically, use Application Manifests in Rust and prefer discrete GPUs to integrated in OpenGL.
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We are splitting our database into Main and CI
We are splitting our database into Main and CI to improve the scalability and reliability of GitLab.com.
129
The AMD Branch (Mis)Predictor Part 2: Where No CPU Has Gone Before
In this blog post, OSS Security Researcher Pawel Wieczorkiewicz shares his journey from trying to save one byte of code to the discovery of two new cases of Straight-Line-Speculation (SLS) which affect the Zen1 and Zen2 microarchitectures of AMD CPUs. Using the findings presented in his earlier blog on the AMD branch…
130
PostgreSQL used fsync incorrectly for 20 years (2019) [video]
About a year ago the PostgreSQL community discovered that fsync (on Linux and some BSD systems) may not work the way we always thought it is, with possibly disastrous consequences for data durability/consistency (which is something the PostgreSQL community really values).
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We used Elixir's Observer to hunt down bottlenecks
Learn how to use Elixir's Observer to chase down bottlenecks and fix runtime issues.
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We upgraded an old, 3PB large, Elasticsearch cluster without downtime
Back in 2018, now five years ago, we published a blog post describing our 400+ node Elasticsearch cluster. In that post we brought up an important topic: So far, we have elected to not upgrade the cluster. We would like to, but so far there have been more urgent tasks. How we actually perform the upgrade is undecided…
133
Congestion Control Arrives in Tor 0.4.7-stable
Tor has released 0.4.7.7, the first stable Tor release with support for congestion control. Congestion control will result in significant performance improvements in Tor, once Exit relays upgrade. Relay operators: please read!
134
A Foolish Consistency: Consul at Fly.io
Documentation and guides from the team at Fly.io.
135
Linux Kernel Ksmbd Use-After-Free Remote Code Execution Vulnerability
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Linux Kernel. Authentication is not required to exploit this vulnerability, but only systems with ksmbd enabled are vulnerable.
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How we made data aggregation on PostgreSQL better and faster
They’re so fast we can’t catch up! Check out our benchmarks with two datasets to learn how we used continuous aggregates to make queries up to 44,000x faster.
137
Hooking Go from Rust
How did we hook Go functions from Rust to work with mirrord? A quick dive into the Go Runtime and switching from the Go stack to the system stack.
138
Lunatic brings Erlang's principles to WebAssembly
In this month’s episode of the Functional Futures podcast, our guest is Bernard Kolobara – the creator of Lunatic, an Erlang-inspired runtime for WebAssembly. Listen to the episode to find out how Erlang's guiding principles helped Bernard create a runtime that's fast, robust, and scalable.
139
Zaplib post-mortem
Welp, this is a weird blog post! Very unexpectedly, we quickly invalidated some of the core hypothesis that make Zaplib work as a startup.
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Freenet build 1495: new user experience and performance
Hyphanet is a peer-to-peer platform for censorship-resistant communication and publishing.
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DWARF-Based Stack Walking Using eBPF
Deep dive into the new DWARF-based stack unwinder using eBPF.
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Linux Threat Hunting: ‘Syslogk’ a kernel rootkit found in the wild
Syslogk Rootkit Revealed: Analysis
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Scaling Kubernetes to Thousands of CRDs
Over the past few months Crossplane has pushed the boundaries of Kubernetes with the number of Custom Resources it supports. In this post we’ll explore the limitations Upbound engineers have discovered and how we’ve helped to overcome them.
146
Fast memcpy, a system design
When I worked at Google, fleet-wide profiling revealed that 25-35% of all CPU time was spent just moving bytes around: memcpy, strcmp, copying between user and kernel buffers in network and disk I/…
147
Hardening the registers: A cascading failure of edge induced fault tolerance
An article by Anonymous : In 2017, Target announced that we had prioritized stores at the center of how we serve our guests – no matter how they choose to shop. To make this store-as-hubs model work, we spent several years redesigning operations and modernizing how we conduct business. We invested billions of dollars…
148
Type-Based Optimizations in the JIT
The official home of the Erlang Programming Language
149
Exploiting a heap overflow in the FreeBSD wi-fi stack
In April of this year, FreeBSD patched a 13-year-old heap overflow in the Wi-Fi stack that could allow network-adjacent attackers to execute arbitrary code on affected installations of FreeBSD Kernel. This bug was originally reported to the ZDI program by a researcher known as m00nbsd and patched in
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FreeBSD 12.4
The FreeBSD Release Engineering Team is pleased to announce the availability of FreeBSD 12.4-RELEASE. This is the fifth release of the stable/12 branch.