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    Subject[tip:perf/core] perf events, x86: Add SandyBridge stalled-cycles-frontend/backend events
    Commit-ID:  e04d1b23f9706186187dcb0be1a752e48dcc540b
    Gitweb: http://git.kernel.org/tip/e04d1b23f9706186187dcb0be1a752e48dcc540b
    Author: Lin Ming <ming.m.lin@intel.com>
    AuthorDate: Fri, 6 May 2011 07:14:02 +0000
    Committer: Ingo Molnar <mingo@elte.hu>
    CommitDate: Fri, 6 May 2011 09:37:03 +0200

    perf events, x86: Add SandyBridge stalled-cycles-frontend/backend events

    Extend the Intel SandyBridge PMU driver with definitions
    for generic front-end and back-end stall events.

    ( As commit 3011203 "perf events, x86: Add Westmere stalled-cycles-frontend/backend
    events" says, these are only approximations. )

    Signed-off-by: Lin Ming <ming.m.lin@intel.com>
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
    Cc: Frederic Weisbecker <fweisbec@gmail.com>
    Cc: Mike Galbraith <efault@gmx.de>
    Cc: Steven Rostedt <rostedt@goodmis.org>
    Link: http://lkml.kernel.org/r/1304666042-17577-1-git-send-email-ming.m.lin@intel.com
    Signed-off-by: Ingo Molnar <mingo@elte.hu>
    ---
    arch/x86/kernel/cpu/perf_event_intel.c | 6 ++++++
    1 files changed, 6 insertions(+), 0 deletions(-)

    diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c
    index e61539b..7cf2ec5 100644
    --- a/arch/x86/kernel/cpu/perf_event_intel.c
    +++ b/arch/x86/kernel/cpu/perf_event_intel.c
    @@ -1474,6 +1474,12 @@ static __init int intel_pmu_init(void)

    x86_pmu.event_constraints = intel_snb_event_constraints;
    x86_pmu.pebs_constraints = intel_snb_pebs_events;
    +
    + /* UOPS_ISSUED.ANY,c=1,i=1 to count stall cycles */
    + intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = 0x180010e;
    + /* UOPS_DISPATCHED.THREAD,c=1,i=1 to count stall cycles*/
    + intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = 0x18001b1;
    +
    pr_cont("SandyBridge events, ");
    break;


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