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Date: Sat, 2 Feb 2008 16:12:36 +0530
From: "Joseph Koshy" <joseph.koshy@gmail.com>
To: "Alexander Motin" <mav@freebsd.org>
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References: <47A25412.3010301@FreeBSD.org> <47A25A0D.2080508@elischer.org>
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Cc: freebsd-hackers@freebsd.org, freebsd-performance@freebsd.org
Subject: Re: Memory allocation performance
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> Thanks, I have already found this. There was only problem, that by
> default it counts cycles only when both logical cores are active while
> one of my cores was halted.

Did you try the 'active' event modifier: "p4-global-power-events,active=any"?

> Sampling on this, profiler shown results close to usual profiling, but
> looking more random:

Adding '-fno-omit-frame-pointer' to CFLAGS may help hwpmc to capture
callchains better.

Regards,
Koshy