tree e9dc528dff1db2d7165f315f9c05877265561444
parent 63d40deb2e7c64ed55943d49f078e09fc4b64b54
author Peter Zijlstra <a.p.zijlstra@chello.nl> 1252077986 +0200
committer Ingo Molnar <mingo@elte.hu> 1252078695 +0200

perf stat: More advanced variance computation

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>