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		Catching Your CPUs Napping (brendangregg.com)
		28 points by emaste on Nov 2, 2014 \| hide \| past \| favorite \| 1 comment

emaste on Nov 2, 2014 [–]

The hwpmc support Brendan's using here is in stock FreeBSD, but the default callchain capture depth is only 8 frames in FreeBSD 10.0, so you'd want to set in loader.conf:

kern.hwpmc.callchaindepth=32

The default is 32 in FreeBSD-Current and the upcoming 10.1 release.

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