perf stat: More advanced variance computation

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Use the more advanced single pass variance algorithm outlined
on the wikipedia page. This is numerically more stable for
larger sample sets.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Peter Zijlstra 2009-09-04 17:26:26 +02:00 • committed by Ingo Molnar

parent 63d40deb2e

commit 8a02631a47

1 changed files with 12 additions and 12 deletions

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tools/perf/builtin-stat.c

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