linux-kernel - [tip:perf/core] perf/x86/uncore: Export basic memory events for IVT IMC PMU

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Message-ID: <tip-85a16ef66cc8a053de80aadf13722a2c1254d346@git.kernel.org>
Date:	Wed, 13 Aug 2014 01:25:14 -0700
From:	tip-bot for Stephane Eranian <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, eranian@...gle.com, hpa@...or.com,
	mingo@...nel.org, peterz@...radead.org, acme@...nel.org,
	tglx@...utronix.de
Subject: [tip:perf/core] perf/x86/uncore:
  Export basic memory events for IVT IMC PMU

Commit-ID:  85a16ef66cc8a053de80aadf13722a2c1254d346
Gitweb:     http://git.kernel.org/tip/85a16ef66cc8a053de80aadf13722a2c1254d346
Author:     Stephane Eranian <eranian@...gle.com>
AuthorDate: Tue, 12 Aug 2014 08:00:31 +0200
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Wed, 13 Aug 2014 07:51:17 +0200

perf/x86/uncore: Export basic memory events for IVT IMC PMU

This patch exposes two basic events for Ivytown IMC uncore PMU:

- cas_count_read: number of full-cache line reads to memory controller
- cas_count_write: number of full-cache line writes to memory controller

Those events use the same encoding as for SNB-EP, so reuse the same
event table. See specification in:

http://www.intel.com/content/dam/www/public/us/en/documents/manuals/xeon-e5-2600-v2-uncore-manual.pdf

By aggregating all the read and write events from all the memory controllers
of each processor socket, one can determine the total memory bandwidth utilization.

Signed-off-by: Stephane Eranian <eranian@...gle.com>
Signed-off-by: Peter Zijlstra <peterz@...radead.org>
Link: http://lkml.kernel.org/r/20140812060031.GA25239@quad
Cc: zheng.z.yan@...el.com
Cc: ak@...ux.intel.com
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/cpu/perf_event_intel_uncore_snbep.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore_snbep.c b/arch/x86/kernel/cpu/perf_event_intel_uncore_snbep.c
index 30468f4..00bd048 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore_snbep.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore_snbep.c
@@ -1422,6 +1422,7 @@ static struct intel_uncore_type ivt_uncore_imc = {
 	.fixed_ctr_bits	= 48,
 	.fixed_ctr	= SNBEP_MC_CHy_PCI_PMON_FIXED_CTR,
 	.fixed_ctl	= SNBEP_MC_CHy_PCI_PMON_FIXED_CTL,
+	.event_descs	= snbep_uncore_imc_events,
 	IVT_UNCORE_PCI_COMMON_INIT(),
 };
 
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