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Date: Thu, 13 Jan 2011 22:08:30 -0500
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From: Ryan Stone <rysto32@gmail.com>
To: Steve Kargl <sgk@troutmask.apl.washington.edu>
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Cc: freebsd-current@freebsd.org
Subject: Re: Profiling code execution on amd64?
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I would suggest using hwpmc for profiling:

# kldload hwpmc
# pmcstat -S unhalted-cycles -O /tmp/samples.out ../penetration
# pmcstat -R /tmp/samples.out -G /tmp/penetration.txt


You can also get pmcstat to generate gprof-compatible output with -g,
but I never use the mode so I'm really not sure what it gives you.  I
think that you have to run gprof on the output or something, but don't
hold me to that.