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The most popular blog posts about systems & performance on Hacker News. 6,943 posts.
Updated February 2, 2016: Once you learn about our team and who we are, come take a trip down memory lane with us! Yesterday morning, the Hosted UI team, responsible for VMware’s Workstation …
Today Raspberry Pi Trading announced the Raspberry Pi 400, the latest in the series of small education-focused computers that started with the original Raspberry Pi in 2012. For years, people have come up with creative ways to hack a Pi into keyboards, like the Original Pi in an old Mitsumi keyboard, or the Pi 3 A+ in…
I don't normally do follow-ups and never this quick. After posting that last article, it was fun to read the comments on Reddit and Hacker News as they rolled in. I even found other discussions . I couldn't help wonder, "Could I have made it even more performant?" . After heading home I decided to take another look.
What’s the “right” level of CPU utilization for a server? If you look at a monitoring dashboard from a well-designed and well-run service, what CPU utilization should we hope to see, averaged over a day or two? It’s a very general question, and it’s not clear it should have a single answer. That said, for a long time…
Today’s Mountain Lion announcement introduces an important new security feature, called Gatekeeper, in addition to the “sandboxing” feature that premiered in Lion. I’d like to talk a little bit about it, and why it’s important to all Mac users.
What kind of durability guarantees fsync system call provides in Linux? Let's find out.
Our systems and ourselves
When programming, we often have to 'escape' strings. A standard way to do it is to insert the backslash character (\) before some characters such as the double quote. For example, the string my title is "La vie" becomes my title is \"La vie\" A simple routine in C++ to escape a string might look … Continue reading…
**Russian ALFA Class interceptor submarine** At the height of the Cold War NATO submariners found themselves confronting a Soviet submarine which not only greatly out-performed their own boats, but which could operate beyond the reach of their weapons… Read More >….
TLDR: ZFS free-space reporting is a lagging indicator. Background I use Proxmox VM server backed by a ZFS array of hard drives for various personal infrastructure. I also have security cameras that upload motion-triggered videos to my server (via FTP!). Problem Description I would like to use 90% of my available space…
Quick, what’s the difference between these two C/C++ definitions of initialized local variables? char buffer[32] = { 0 };char buffer[32] = {}; One difference is that the first is legal in C a…
Access technologies from partnerships with the community and leaders. Everything open source at Intel. We have a lot to share and a lot to learn.
by Robin Harris | Wednesday, April 30, 2014 | Architecture , Cloud computing & storage , Object storage | 14 comments
Ultrassembler is a superfast and complete RISC-V assembler library that I'm writing as a component of the bigger Chata signal processing project.
Useful and fun features related to the OpenBSD packet filter.
Box64 and RISC-V, the challenges of wrtting the Dynarec, and benchmarks
When Apple originally released the iPhone SDK in 2008, I was extremely excited about it, and immediately started working on multiple different iPhone apps. By 2009, though, I had become so uncomfortable with Apple’s stewardship of its mobile platform that I released the one game that was furthest along, and…
Let me set the right expectations first. This bug I found is actually not that complicated, it's very straightforward once you see what's going on. But I still think the process it took me to uncover this bug could be interesting. It's also kind of interesting that a simple bug stayed undiscovered for so long. I will…
I'm an incredibly slow programmer (in the hobby projects I do for the love of it, that is). My ratio of thinking to typing must be around 10...
The Network Time Protocol (NTP) is a system for synchronizing the clocks of hosts and clients across the Internet. NTP is a protocol intended to synchronize all computers participating in the network to within a few milliseconds of Coordinated Universal Time (UTC). The core of the protocol is NTP’s clock discipline…
An optimization that made Pivot significantly faster on GROUP BY queries with a Top-K operator above them, and a walkthrough of how analytical databases run GROUP BY in the first place.
Access technologies from partnerships with the community and leaders. Everything open source at Intel. We have a lot to share and a lot to learn.
