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Security researchers identify new malware targeting Linux
ESET researchers analyzed previously unknown Linux backdoors that are connected to known Windows malware used by the China-aligned Gelsemium group, as well as to Project Wood.
Topics /
Systems & Performance
The most popular blog posts about systems & performance on Hacker News. 2,560 posts.
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PyPy - We need Software Transactional Memory
Hi all. Here is (an extract of) a short summary paper about my current position on Software Transactional Memory as a general tool in the ...
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RethinkDB 2.1 beta: automatic failover with Raft
The upcoming 2.1 release will introduce important improvements , including support for automatic failover. Although we’re still hard at work on the finishing touches that will make the new features ready for production use, the beta offers an opportunity to get an early look.
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SIMD for Collision
In a previous post SIMD Matters I discussed the big wins I got from graph coloring to make the contact solver faster. That same approach exists in Box3D. I like to call this approach “wide SIMD”. The idea is to process multiple work units at the same time. In the contact solver this means solving four contact points…
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Scalable Stream Processing: A Survey of Storm, Samza, Spark and Flink
(At the bottom of this page, you find a BibTeX reference to cite this article.)
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How Uploadcare Built a Stack That Handles 350M File API Requests per Day
Discover the tech stack used by Uploadcare. Explore 45 tools across 4 categories.
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Ledger: Stripe's system for tracking and validating money movement
Technical details on how Stripe built Ledger, a state-of-the-art money movement tracking system, including how teams at Stripe interact with the data quality metrics that underlie our payment processing network.
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ReactOS 0.4.12
ReactOS is a free, opensource reimplementation of windows
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Impala: Scalable Distributed Deep Reinforcement Learning
Deep Reinforcement Learning (DeepRL) has achieved remarkable success in a range of tasks, from continuous control problems in robotics to playing games like Go and Atari. The improvements seen in these domains have so far been limited to individual tasks where a separate agent has been tuned and trained for each task.
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A look at LLVM: comparing clamp implementations
Please note that this is not an endorsement or criticism of either of these languages. It’s simply something I found interesting with how LLVM handles code generation between the two. This is an implementation quirk, not a language issue. Update (April 9, 2021): A bug report was filed and a fix was pushed! The LLVM…
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Leaving No Pixel Behind: Three Years in Xenia's GPU Emulation
xenia is a BSD licensed open source research project for emulating Xbox 360 games on modern PCs.
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WASI 0.2.0 and Why It Matters
With the release of WASI Preview 2, we take a step back and look at why it matters for wasmCloud and the WebAssembly ecosystem.
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ARM64EC: Building Native and Interoperable Apps for Windows 11 on ARM
Today, we’re announcing ARM64EC (“Emulation Compatible”), a new way to build apps for Windows 11 on ARM. With the latest Visual Studio tools in preview and the Windows 11 Insider SDK, you'll be able to take advantage of ARM64EC to incrementally
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Landing a new syscall, part 1: What is futex?
A deep dive into the futex system call and how it is used to process synchronization functions.
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Qualcomm Linux 2.0
Unified code base. Upstream first. No fork. SoC agnostic. Learn how you can build with Qualcomm Linux 2.0
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History of ZFS Part 2: Exploding in Popularity
Discover how ZFS rapidly gained popularity from its inception at Sun, leading to the rise of OpenZFS. Learn about its journey in the second part of our series.
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FreeBSD 9.1 Release Announcement
The FreeBSD Release Engineering Team is pleased to announce the availability of FreeBSD 9.1-RELEASE. This is the second release from the stable/9 branch, which improves on the stability of FreeBSD 9.0 and introduces some new features. Some of the highlights:
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Effectively Managing Memory at Gmail Scale
While JavaScript employs garbage collection for automatic memory management, it is not a substitute for effective memory management in applications. JavaScript applications suffer from the same memory related problems that native applications do, such as memory leaks and bloat, yet they must also deal with garbage…
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New SysJoker Backdoor Targets Windows, Linux, and macOS
In December 2021, we discovered a new multi-platform backdoor that targets Windows, Mac, and Linux that we have named SysJoker.
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Jepsen: Aerospike 3.99.0.3
Aerospike , formerly Citrusleaf, is a distributed, sharded document store designed for high-throughput, low-latency applications. Each record is a map of keys to values, which may be either primitive types (integers, strings, bytes, etc.) or nested collections like lists and maps. Secondary indices are also available…
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A Look at MyRocks Performance
Taking a look at MyRocks performance through some benchmark testing.
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Bottomless, consumption-based storage for PostgreSQL built on Amazon S3
Data management decisions don’t have to be costly. Introducing Tiered Storage, a low-cost infinite storage tier for your historical data needs.
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Jepsen: Jetcd 0.8.2
Etcd is a coordination service designed to offer Strict Serializable reads, writes, and micro-transactions over a small, in-memory key-value store. In 2022, Jepsen re-tested etcd as a part of a private engagement covering an assortment of databases. We reported several issues to the etcd team during that engagement…
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Introduction to Hierarchical State Machines
The formalism of Hierarchical State Machines (aka statecharts) makes the state machine approach truly applicable to real-life embedded systems. Read more.
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Rediscovering the Intel AMT Vulnerability
On May 1, 2017 Intel disclosed the AMT vulnerability (INTEL-SA-00075), but details of that vulnerability were not made public. However, Tenable researchers were able to overcome this challenge and make Tenable the first to deliver Intel AMT vulnerability detection capabilities to customers, just minutes after Intel’s…
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Support for better symlink handling in Windows 10
Overview Symlinks, or symbolic links, are “virtual” files or folders which reference a physical file or folder located elsewhere, and are an important feature built in to many operating systems, including Linux and Windows. The Windows’ NTFS file system has supported symlinks since Windows Vista. However, it hasn’t…
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When are SSDs slow?
CedarDB is a database system that delivers unmatched performance for transactions and analytics, from small writes to handling billions of rows. Built on cutting-edge research to power today’s tools and tomorrow’s challenges.