Brendan Gregg
@brendangregg
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Makes things fast. Expert in computer performance and eBPF. Intel Fellow, ex-Netflix. Created flame graphs. Aussie. Opinions my own. [email protected]
Joined October 2010
Announcing my next book: Systems Performance: Enterprise and the Cloud, 2nd Edition (2020)
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Announcing my next book: BPF Performance Tools: Linux System and Application Observability, for which I developed over 100 new tools
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updated Linux tools diagram (PNG & SVG) with recent bcc additions
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Slides for Linux Systems Performance at USENIX #LISA19 and the updated observability diagram
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I emailed a Linux kernel dev about a 3 line change they made almost 24 years ago (Oct 1993), and got a detailed reply in 1 hr.
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Linux observability tools (from http://t.co/tMyCAxBwyS), updated for my #LinuxCon talk Wed http://t.co/26nvyxuH30.
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My BPF book is publishing today as an eBook (it's already on Amazon), and InformIT have a 55% off for 2 or more Black Friday sale until Dec 3rd! Get copies for your whole team (thank you). Code "BF2019". #BPF
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new post, and perhaps a new year's resolution: Learn eBPF Tracing -- beginner, intermediate, and advanced
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New blog post: The Return of the Frame Pointers (Fedora, Ubuntu)
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Good news from Oracle: DTrace is GPL'd (thank you!). I'd guess by the end of 2018 we'll have a working /usr/sbin/dtrace on Linux for running D scripts (using libbcc+eBPF on the backend)
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new post: bpftrace (DTrace 2.0) for Linux 2018. Repo just made public!
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People are already reading my next book, BPF Performance Tools: Linux System and Application Observability. The rough cut is now on Safari #eBPF
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Thanks, Greg! I'm thrilled to be joining at this exciting time. I'm looking forward to improving the performance and observability of everything -- all xPUs, apps to metal -- working with great people at a company I have long respected and admired.
Welcome @brendangregg to our software team @Intel. Having worked with him at Sun Microsystems, his contributions to improving systems performance needs little introduction. He will focus on strengthening our leadership in computing across Intel’s xPUs.
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Systems Performance 2nd Edition paperback is finally available on Amazon US
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New startups are developing eBPF as a "zero instrumentation" observability/APM solution. Trace plaintext HTTP/gRPC/etc. across your site calls without code changes (zero added instrumentation). Currently via uprobe hacking. 1/n.
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new Linux bcc/eBPF tools have merged, and I updated the diagram
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Systems Performance 2nd Edition (just released).
📢 eBook Deal: Systems Peformance: Enterprise & the Cloud from @brendangregg eBook files include drm-free PDF, EPUB, & MOBI. $29.99 through Sat May 15: #linux #unix #cloudcomputing #BPF
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Linux Systems Performance in 40 minutes, a summary for everyone: My #LISA19 talk video is up
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Netflix tech blog: How Netflix uses eBPF flog logs at scale for network observability
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I'm hiring for my first ever team. My first job description is for Cloud Performance and eBPF engineers! (many locations, I don't know why it defaults to saying Arizona):
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Slides for my Linux perf tools tutorial at #velocityconf 2015 http://t.co/DYCEMQlP5U
http://t.co/ETAAmPO9RA.
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AI Flame Graphs: Showing what's actually running on the HW and how we got there. Uses Intel EU stall profiling and eBPF.
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My reply to the recent reddit/redct redesign of the tools diagram
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Did Linux get slower after 4.14? Yes, if you use the KPTI defaults. How much? Between 1 and 800%, depending on your workload. I expected our workloads to slow by between 0.1 and 6%. I wrote about it before
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Linus not only apologizes, but in detail. This is a huge moment for Linux, and tech.
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I get more requests to give BPF/bpftrace talks than I can do, so I'm opening up my slide source for others to use. #eBPF
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Netflix Titus, our container platform, is now open sourced
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my #reinvent talk BPF Performance Analysis at Netflix, including the BPF theremin demo, is now online:
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I published a new page: Linux Enhanced BPF (eBPF) Tracing Tools
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new post: KPTI/KAISER Meltdown Initial Performance Regressions
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My CPU utilization is WRONG lightning talk from #SCALE16x, with a surprise ending relevant to everyone in 2018 @opensourceway.
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Larry attacking another database for not being open source. When I'd thought I'd seen it all.
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"a regular expression that backtracked enormously and exhausted CPU" -- don't use regexps in perf critical code (as @guycirino would insist); thanks @Cloudflare for the writeup
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eBPF in Microsoft Windows is a big deal, not just for Microsoft, but for us in BPF. Technical decisions with BPF will consider other kernels when appropriate, so things work everywhere and not just on Linux. 1/2.
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Netflix/Intel working together to find low-level PMC-based perf wins in the cloud (by my colleagues Vadim and Harshad)
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What BPF is really about (it's not just perf tools): I summarized it for the first time in this 30-min keynote, video now up.
Extended BPF is a new software type and makes a fundamental change to the 50-year old kernel model. Hear what expert @brendangregg of #netflix says during his keynote at #UbuntuMasters via @YouTube.
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Now with a BSD kernel :-) FreeBSD perf observ tools for @MeetBSDCA
http://t.co/e3PoBfUg1u.
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eBPF Foundation announced. Founding members are Facebook, Google, Isovalent, Microsoft, Netflix.
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new post: Evaluating the Evaluation: A Benchmarking Checklist
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Dynamic tracing tools for Linux: - the new homepage for bcc/BPF.
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Serving 100 Gbps from an Open Connect Appliance by Drew Gallatin at Netfilx
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my most popular posts of 2017: .%CPU: load avg: solaris2linux: jerks: netflix: nitro:
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The BPF Performance Tools book immediately sold out on Amazon (thanks for getting it!) I think there are still copies on InformIT while they print more
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My "Give me 15 minutes and I'll change your view of Linux tracing" post is popular today
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HUGE: "Going forward, we’ll use this hypervisor to power other instance types" -. AWS's new KVM-based hypervisor
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BPF Performance Tools is shipping! While waiting for your copy you can read the first 100 pages on the preview here (or read the entire eBook) #eBPF.
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I demoed my BPF theremin at #reInvent.
. enabling us to instrument code to figure out arbitrary things like wifi signal strength.
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My best Linux Performance Tools tutorial, on video (100 minutes) with slides http://t.co/aXtuwDvtQE.
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New post: No More Blue Fridays: How eBPF is already being adopted to prevent kernel crashes
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eBPF comes to applications: BPF Memory Cache (BMC) is an eBPF memcached accelerator. Currently for GET requests over UDP. Promising work! Thanks @Orange
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FreeBSD performance observability tools, in my latest post http://t.co/W3c8oyFkAW
http://t.co/rLZxNdRRVj.
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For my #SCaLE17x talk, I analyzed Minecraft live using eBPF, and built an off-CPU time flame graph of Minecraft delays with full stacks
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LinkedIn has enhanced flame graphs to do automatic issue detection for common issues (JVM):
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OS X perf tools, slide from my upcoming talk @MacITConf
http://t.co/gmFQc74cnd
#MacIT2014
http://t.co/KdKFif9En1.
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I changed the motd on some servers recently and it's the best
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Don't assume any eBPF observability post/talk/book has had any review by the eBPF community, or is based on any up to date research. I saw another case of 5-year old advice posted as new. Most advice (2021) summarized in this one slide
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new post about my last talk of 2017: AWS re:Invent: How Netflix Tunes EC2.
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