What Brendan Gregg thinks about developer tools
Computer performance engineer working on datacenter performance at OpenAI, previously Netflix and Sun/Joyent. Author of Systems Performance and BPF Performance Tools, and creator of flame graphs.
Brendan Gregg did not write this page.
We collected these quotes from things they published elsewhere, and every quote links to where it was said. They have no account here and have not endorsed this site. Quotes are word for word; the short line under each one is our own restatement, not their wording. Their own site. Is this you? Claim it or ask us to remove it. Or tell us what is wrong here.
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3 dated positions, 2025, in their own words. Our reading of what Brendan Gregg has said — not written or endorsed by them.
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Their wordsOne performance anti-pattern is when a company, to debug one performance problem, installs a monitoring tool that periodically does work and causes application latency outliers.
↗When to Hire a Computer Performance Engineering Team (2025) part 1 of 2brendangregg.com 2nd of 3 in this piece
- 3 months earlier
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Their wordsThis is getting easier in the lastest versions of Fedora and Ubuntu (e.g., Ubuntu 24.04 LTS) which are shipping system libraries with frame pointers by default.
↗Doom GPU Flame Graphsbrendangregg.com 1st of 2 in this piece
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Their wordsThey do have flame graphs in Nsight Graphics for GPU workloads, although their flame graphs are currently shallow as it is GPU code only, and onerous to use as I believe it requires an interposer; on the plus side they have click-to-source.
↗Doom GPU Flame Graphsbrendangregg.com 2nd of 2 in this piece