Commit-ID: 5e176213a6b2bc5146820c79542d37290434a3c4
Gitweb: http://git.kernel.org/tip/5e176213a6b2bc5146820c79542d37290434a3c4
Author: Andi Kleen <[email protected]>
AuthorDate: Mon, 14 Sep 2015 14:47:02 -0700
Committer: Ingo Molnar <[email protected]>
CommitDate: Fri, 18 Sep 2015 09:20:21 +0200
perf/x86/intel: Make the CYCLE_ACTIVITY.* constraint on Broadwell more specific
The counter constraint for CYCLE_ACTIVITY.* on Broadwell covered
all CYCLE_ACTIVITY.* sub events, and forced them on counter 2.
But actually only one sub event (umask 8) needs to be on counter 2,
all others do not have any constraint.
Only force that subevent. This fixes groups with multiple
CYCLE_ACTIVITY.* events, for example:
% perf stat -x, -e '{cpu/event=0xa3,umask=0x6,cmask=6/,\
cpu/event=0xa2,umask=0x8/,\
cpu/event=0xa3,umask=0x4,cmask=4/,cpu/event=0xb1,umask=0x1,cmask=1/}'
true
122150,,cpu/event=0xa3,umask=0x6,cmask=6/,846486,100.00
16483,,cpu/event=0xa2,umask=0x8/,846486,100.00
252280,,cpu/event=0xa3,umask=0x4,cmask=4/,846486,100.00
233604,,cpu/event=0xb1,umask=0x1,cmask=1/,846486,100.00
%
Without this patch the third result would be <unsupported>
Signed-off-by: Andi Kleen <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link:
http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
---
arch/x86/kernel/cpu/perf_event_intel.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kernel/cpu/perf_event_intel.c
b/arch/x86/kernel/cpu/perf_event_intel.c
index 3fefebf..1d84b41 100644
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -250,7 +250,7 @@ struct event_constraint intel_bdw_event_constraints[] = {
FIXED_EVENT_CONSTRAINT(0x003c, 1), /* CPU_CLK_UNHALTED.CORE */
FIXED_EVENT_CONSTRAINT(0x0300, 2), /* CPU_CLK_UNHALTED.REF */
INTEL_UEVENT_CONSTRAINT(0x148, 0x4), /* L1D_PEND_MISS.PENDING */
- INTEL_EVENT_CONSTRAINT(0xa3, 0x4), /* CYCLE_ACTIVITY.* */
+ INTEL_UEVENT_CONSTRAINT(0x8a3, 0x4), /*
CYCLE_ACTIVITY.CYCLES_L1D_MISS */
EVENT_CONSTRAINT_END
};
--
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