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Make your programs run faster by better using the data cache (2020)
We investigate how the data cache influences the performance of your program, talk about ways for you to write faster programs by better leveraging the data cache.
Top posts
Every blog post that took off on Hacker News, ranked by the votes of its best submission. 4,389 posts.
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Huawei ExaGear: x86_64 apps on Arm 64-bit Linux systems
Note: This post is only kept up for historical reasons. The current ExaGear EULA doesn’t allow using ExaGear outside of Huawei Kunpeng processors.
2853
Job queues are deceptively tricky
A worked out example of different job queueing semantics and how they affect workloads.
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OS Technologies to Watch
If you just want to get in touch, you can talk to me in an emailwardly fashion here .
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I got nerd sniped into benchmarking legacy x86 instructions (2019)
How I got nerd sniped into benchmarking legacy x86 instructions
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How to Write Fast Code
Bioinformatics, genomics, and Javascript
2858
Geeking Out with UEFI
Some people may think some of my past posts get into the weeds, exploring the technical depths of Windows Autopilot, Intune, Windows 10, ConfigMgr, etc. But I would say those generally only g…
2859
Hand-optimizing the TCC code generator
I am on a number of different compiler mailing lists. One of those is the mailing list for the Tiny C Compiler . Imagine my surprise when a recent email mentioned our latest series and suggested trying a similar approach to improve the code generator in TCC. I was interested to see if there were any low-hanging fruit…
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FreeBSD Bhyve Virtualization
The Bhyve FreeBSD hypervisor (called/spelled ‘beehive’ usually) was created almost 10 years ago. Right now it offers speed and features that other similar solutions provide – such…
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Pico Cray – Small scale distributed computing
The Pico Cray is a cluster of 8 Picos and a controller Pico. All Picos are connected in parallel by an I2C bus. The controller is designated by one GPIO being held low, the processor Pico’s addresses are allocated automatically. The Controller Pico has a 320x240px display connected by SPI and a couple of buttons. ……
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GCC 8 Link Time and Interprocedural Optimization
GCC 8.1 was released and Linux distros are starting to pick it up. This week hit the openSUSE Thumbleweed update with full rebuild (thanks t...
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Two-phase commit and beyond
In this post, we model and explore the two-phase commit protocol using TLA+. The two-phase commit protocol is practical and is used in man...
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UTC, Tai, and Unix Time (2001)
TAI times are identified by year, month, day, hour, minute, and second. There are exactly 86400 TAI seconds in every TAI day. TAI days are labelled by the Gregorian calendar.
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Big Sur on Unsupported Macs
My macOS Big Sur Patcher allowed countless users of older Macs to enjoy the new design and features of macOS Big Sur.
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Beating C with 70 lines of Go
Writing a faster wc utility in Go
2870
ARM vs. Intel on Amazon’s Cloud: A URL Parsing Benchmark
Twitter user opdroid1234 remarked that they are getting more performance out of the ARM nodes than out of the Intel nodes on Amazon's cloud (AWS). I found previously that the Graviton 3 processors had less bandwidth than comparable Intel systems. However, I have not done much in terms of raw compute power. The Intel…
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Programming Modern Systems Like It Was 1984
It's not about technology for its own sake. It's about being able to implement your ideas.
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The Moore's Law free lunch is over. Now welcome to the hardware jungle.
Or, A Heterogeneous Supercomputer in Every Pocket In the twilight of Moore’s Law, the transitions to multicore processors, GPU computing, and HaaS cloud computing are not separate trends, bu…
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If one GUI's not enough for your SPARC workstation, try four
Who needs a jack-o-lantern when you've got a bright orange gas plasma display? This is a 1990 Solbourne Computer S3000 all-in-one workst...
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Boot Naked Linux
When I was a kid , computers weren’t coddled and left running 24/7, when you were done with them you switched them off, and when you wanted them again you just switched them on and within a second or so they’d be loading whatever was in their disk drive.
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Writing a FUSE filesystem in Python
If you’re a regular reader, you might have noticed that I’ve been on a quest for the perfect backup program , and ended up writing my own encryption layer over bup.
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What I learned from Erlang about resiliency in systems design (2019)
Failure in computer systems is inevitable. Adopting Erlang's philosophy of "Let it crash" at the many layers of abstractions in software can have a huge positive impact on resiliency.
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Recovering deleted files using only grep
Alex Clemmer is a computer programmer. Other programmers love Alex, excitedly describing him as "employed here" and "the boss's son".
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ServiceFabric: a distributed platform for building microservices in the cloud
ServiceFabric: a distributed platform for building microservices in the cloud Kakivaya et al., EuroSys’18 (If you don’t have ACM Digital Library access, the paper can be accessed either by fo…