K 10
svn:author
V 9
jimharris
K 8
svn:date
V 27
2012-08-22T20:22:55.076265Z
K 7
svn:log
V 449
Remove unncessary atomic operation when reading process flags in
PMC_PROC_IS_USING_PMCS macro.

Invocations of this macro are not synchronized with setting/clearing
of P_HWPMC flag, so the atomic operation here isn't needed.  Removing
the atomic operation provides noticeable improvement (5-6%) on
some scheduler-intensive workloads with HWPMC_HOOKS enabled on an
8C Sandy Bridge Xeon system.

Sponsored by: Intel
Reviewed by: jhb
MFC after: 1 week

END