perf event, x86: Use better stalled cycles metric

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Use the UOPS_EXECUTED.*,c=1,i=1 event on Intel CPUs - it is a rather
good indicator of CPU execution stalls, more sensitive and more inclusive
than the 0xa2 resource stalls event (which does not count nearly as many
stall types).

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/n/tip-7y40wib8n1eqio7hjpn2dsrm@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Ingo Molnar 2011-04-28 11:16:44 +02:00

parent 9ceb1c3d1f

commit 8a850cadca

1 changed files with 2 additions and 2 deletions

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arch/x86/kernel/cpu/perf_event_intel.c

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