Brendan Gregg
Performance engineer at OpenAI; creator of flame graphs; author of Systems Performance.
At a glance
Also on this page: Key facts · Links · Sources · Related pages
- Brendan Gregg is an Australian computer performance engineer.
- He created flame graphs and the USE Method, and helped pioneer eBPF for observability.
- He worked at Netflix from 2014 to 2022 and at Intel, as an Intel Fellow, from 2022 to 2025.
- In February 2026 he wrote that he had joined OpenAI to work on datacenter performance for ChatGPT.
Key facts
- Now
- Datacenter performance for ChatGPT at OpenAI; joined early 20262
- Intel
- Intel Fellow from May 2022; resigned in December 20253
- Netflix
- Joined in 2014; left in April 20224
- Earlier
- Sun Microsystems (built the ZFS L2ARC), Oracle, Joyent1
- Known for
- Flame graphs, latency heat maps, the USE Method, eBPF tracing tools, the DTraceToolkit1
- Books
- Systems Performance (2nd ed., 2020); BPF Performance Tools (2019)1
- Award
- USENIX LISA Outstanding Achievement Award, 20131
Roles
Part of
- OpenAIOrganization
datacenter performance for ChatGPT; joined by February 2026 · since 2026 source on OpenAI
Before
Part of until Apr 2022
Netflix (performance engineer) source on Netflix
Links
- brendangregg.com (opens brendangregg.com)
- Blog (opens brendangregg.com)
- X @brendangregg (opens x.com)
- Mastodon (opens aus.social)
- GitHub (opens github.com)
- Wikipedia (opens en.wikipedia.org)
- Where they publish (ppll) (opens ppll.app)
- What they believe (korrents) (opens korrents.com)
- What they recommend (rcmnd) (opens rcmnd.app)
Sources
- Wikipedia: Brendan Gregg (opens en.wikipedia.org)
- Brendan Gregg: Why I joined OpenAI (7 February 2026) (opens brendangregg.com)
- Brendan Gregg: Leaving Intel (5 December 2025) (opens brendangregg.com)
- Brendan Gregg: Netflix End of Series 1 (15 April 2022) (opens brendangregg.com)
- Brendan Gregg: Brendan@Intel.com (2 May 2022) (opens brendangregg.com)
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