Brendan Gregg

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Los Gatos, California

Brendan Gregg is a senior performance architect at Netflix, where he does large scale computer performance design, analysis, and tuning.

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It's great to see this analysis and your findings with data structures performance, however, I think you've missed the biggest point of all: Almost everyone is doing it wrong. You shouldn't be doing per-packet tracing nowadays. That's network observability from the 90's. I helped Netflix build a flow accounting solution based on kernel function tracing of TCP session changes, the core of which I open sourced as my tcplife bcc tool on github. The overhead of this approach is

(seems my prior post got cut off when I included a less-than sign)... less than 0.1%.