Performance Instrumentation Counters: short talk

Performance Instrumentation Counters (PICs) allow CPU internals to be observed, and are especially useful for identifying why exactly CPUs are busy – not just that they are. I’ve blogged about them before, as part of analyzing HyperTransport utilization and CPI (Cycles-per-Instruction). There are a number of performance analysis needs for which can only be answered [...]

Posted on May 15, 2010 at 4:26 pm by Brendan Gregg · Permalink · 4 Comments
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FROSUG perf horrors

A couple of days before Halloween I gave a talk titled “Little Shop of Performance Horrors” at the Front Range OpenSolaris User Group (FROSUG), in Denver, Colorado. The title was suggested to me, which inspired me to talk about things going wrong in the field of system performance. We had a great turnout, despite the [...]

Posted on November 11, 2009 at 6:53 pm by Brendan Gregg · Permalink · One Comment
In: Performance · Tagged with: , , , ,