Messages in this thread Patch in this message | | | Date | Wed, 24 Oct 2012 02:59:38 -0700 | From | tip-bot for Vince Weaver <> | Subject | [tip:perf/urgent] perf/x86: Fix P6 FP_ASSIST event constraint |
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Commit-ID: 7991c9ca40d3127dd2ffa3a9c1e33f7d4005495a Gitweb: http://git.kernel.org/tip/7991c9ca40d3127dd2ffa3a9c1e33f7d4005495a Author: Vince Weaver <vincent.weaver@maine.edu> AuthorDate: Fri, 19 Oct 2012 17:30:01 -0400 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Wed, 24 Oct 2012 10:31:57 +0200
perf/x86: Fix P6 FP_ASSIST event constraint
According to Intel SDM Volume 3B, FP_ASSIST is limited to Counter 1 only, not Counter 0.
Tested on a Pentium II.
Signed-off-by: Vince Weaver <vincent.weaver@maine.edu> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/alpine.DEB.2.02.1210191728570.14552@vincent-weaver-1.um.maine.edu Signed-off-by: Ingo Molnar <mingo@kernel.org> --- arch/x86/kernel/cpu/perf_event_p6.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_event_p6.c b/arch/x86/kernel/cpu/perf_event_p6.c index e4dd0f7..0ff5f7f 100644 --- a/arch/x86/kernel/cpu/perf_event_p6.c +++ b/arch/x86/kernel/cpu/perf_event_p6.c @@ -34,7 +34,7 @@ static struct event_constraint p6_event_constraints[] = { INTEL_EVENT_CONSTRAINT(0xc1, 0x1), /* FLOPS */ INTEL_EVENT_CONSTRAINT(0x10, 0x1), /* FP_COMP_OPS_EXE */ - INTEL_EVENT_CONSTRAINT(0x11, 0x1), /* FP_ASSIST */ + INTEL_EVENT_CONSTRAINT(0x11, 0x2), /* FP_ASSIST */ INTEL_EVENT_CONSTRAINT(0x12, 0x2), /* MUL */ INTEL_EVENT_CONSTRAINT(0x13, 0x2), /* DIV */ INTEL_EVENT_CONSTRAINT(0x14, 0x1), /* CYCLES_DIV_BUSY */
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