Date: Sat, 24 Jan 2009 10:22:49 +0000 (UTC) From: Robert Watson <rwatson@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/kern kern_timeout.c Message-ID: <200901241022.n0OAMtS8045178@repoman.freebsd.org>
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rwatson 2009-01-24 10:22:49 UTC
FreeBSD src repository
Modified files:
sys/kern kern_timeout.c
Log:
SVN rev 187664 on 2009-01-24 10:22:49Z by rwatson
Add explicit static DTrace tracing to the callout mechanism, capturing
pointers to the callout handler just before and just after the callout
it invoked. I attempted to do this in a manner congruent to tracing in
Solaris's callout mechanism, but couldn't quite use the same names due
to convention and syntax differences.
Example DTrace script to generate a distribution graph of callout
execution times:
callout_execute:::callout_start
{
self->cstart = timestamp;
}
callout_execute:::callout_end
{
@length = quantize(timestamp - self->cstart);
}
Reviewed by: jb
MFC after: 3 days
Revision Changes Path
1.118 +15 -0 src/sys/kern/kern_timeout.c
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