Messages in this thread | | | Date | Sun, 22 Aug 2004 13:50:34 +1000 | From | Anton Blanchard <> | Subject | Re: [PATCH] improve OProfile on many-way systems |
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> Anyway. My question was mainly a prod in the antonward direction ;)
And Im prepared this time :) An excerpt from my test results a few months ago:
> I ran a fork/exit intensive benchmark (sdet) on a big machine. > > No patch: > Enabling oprofile resulted in over a 10 times slow down in performance. > > oprofile1.patch: > About 2% slowdown when oprofile enabled > > oprofile2.patch: > About 5% slowdown when oprofile enabled
The final version was actually oprofile3.patch but it had a similar (10 times) gain in sdet performance.
So the patch is good stuff. Ive been running it locally for the last few months without a problem.
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