linux-kernel - [tip:perf/core] perf events, x86: Add SandyBridge stalled-cycles-frontend/backend events

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Date:	Fri, 6 May 2011 07:40:49 GMT
From:	tip-bot for Lin Ming <ming.m.lin@...el.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, acme@...hat.com, hpa@...or.com,
	mingo@...hat.com, a.p.zijlstra@...llo.nl, efault@....de,
	fweisbec@...il.com, rostedt@...dmis.org, ming.m.lin@...el.com,
	tglx@...utronix.de, mingo@...e.hu
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@...el.com>
AuthorDate: Fri, 6 May 2011 07:14:02 +0000
Committer:  Ingo Molnar <mingo@...e.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@...el.com>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Mike Galbraith <efault@....de>
Cc: Steven Rostedt <rostedt@...dmis.org>
Link: http://lkml.kernel.org/r/1304666042-17577-1-git-send-email-ming.m.lin@intel.com
Signed-off-by: Ingo Molnar <mingo@...e.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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