Matt Fleming
@fleming_matt
Co-founder @nyrkio. Systems Engineer @Cloudflare. Former Linux Kernel EFI maintainer. (Operating ∪ Database ∪ Distributed) ∩ Systems. http://mfleming.bsky.social
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If you're responsible for performance (of a feature, product, or just all the things) at your company and can spare 30 minutes I'd love to have a technical call with you to understand how you do things! 📈 DMs open 📭 Retweets appreciated 🙏
Me and @JesperBrouer wrote a blog post on the kernel’s BPF LPM trie implementation and cover some of the performance gotchas with the current code. blog.cloudflare.com/a-deep-dive-in…
Full report for yesterday’s Google outage - not feature flagging a new code path - null pointer crashing a binary when reading empty fields from Spanner - remediation causing a thundering herd as there was no exponential backoff - which required manual throttling to recover from
we are looking for a p99 engineer to work on infra/autoscaling/k8s tooling for the 10s of clusters (soon 100s) we run across all 3 clouds. dm me
Practical Benchmarking: How To Detect Performance Changes in Noisy Results bit.ly/4iog2z8 by @fleming_matt
Happy to announce we're growing our team 🚀 We're looking for folks to help us build out our backend infrastructure. If Golang is your native tongue, and distributed systems, system admin and high performance/efficiency are your cup of tea (or coffee!) please apply. Come on over…
We are hiring! 💥 We're rapidly growing and are looking for strong additions to our team. Check out the postings below 👇🧵
João Lima & @fleming_matt will explain the design & architecture of Cloudflare's boot infrastructure, the decisions made to help it scale, & how it allows customization while maintaining trust. Don't miss this one at Monster Scale Summit! ow.ly/nNqn50UElPk #ScyllaDB
I've been catching up on CS papers from the past six months, and wow...DBLP is so awesome. It makes it so easy to find all of the papers in a single place. Great example from Networked Systems Design and Implementation (NSDI): dblp.org/db/conf/nsdi/n…
Uncached buffered IO is back, after a 5 year hiatus. Simpler and cleaner now. Up to 65-75% improvement, at half the CPU usage on my system. And none of the nonsense of the unpredictability of the page cache. See commit 1 and 3 for read/write perf data. git.kernel.dk/cgit/linux/log…
I presented my talk on "Deterministic Simulation Testing" yesterday. If you missed the stream, here's a recording: youtube.com/live/29Vz5wkoU… Thanks @bebraw and @Future_Frontend for co-organizing and the awesome audience for first Systems from HEL!
youtube.com
YouTube
FF meetup #4 - Deterministic simulation testing
AI Flame Graphs: Showing what's actually running on the HW and how we got there. Uses Intel EU stall profiling and eBPF. brendangregg.com/blog/2024-10-2…
Last chance to submit papers to the International Conference on #Performance Engineering (#ICPE2025 - May 5-9, 2025 in Toronto ) - the deadline is Nov 01, 2024 for both the Research and Industry tracks . Please check icpe2025.spec.org for details.
We are seeking a skilled Linux Kernel Security Expert to join our world class kernel team. Apply now and make a difference: jobs.suse.com/us/en/job/7100… #LinuxJobs #SUSE #Hiring
The essence of software optimisation explained in a single tweet.
We are hiring! 💥 We're rapidly growing and are looking for strong additions to our team. Check out the postings below 👇🧵
sch_ext is the feature I’m most excited about in Linux 6.12
Want to learn something over the weekend? Learn how to write a minimal Linux scheduler with eBPF and sched_ext in C in my tutorial: mostlynerdless.de/blog/2024/10/2…
I'm glad my small contribution, which may help more people start using @Nyrkio, was accepted and merged. Thank you, @h_ingo and @fleming_matt! medium.com/itnext/how-to-… github.com/nyrkio/nyrkio/…
Nice talk about spotting performance regressions with change point detection from @fleming_matt at #p99conf
This is happening right now. Im also on the live chat for Q&A
Change Point Direction is gaining traction for performance change detection. In 15 min., learn how these algorithms work, as well as some examples of regressions discovered by CPD in open-source projects during @fleming_matt's #P99CONF session. ow.ly/etpH50TQZec #ScyllaDB
How to Deploy Nyrkiö Locally Using #Docker A Step-by-Step #Guide to Help You Get the Application Up and Running #Performance #Testing @Docker @nyrkio medium.com/itnext/how-to-…
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