linux-kernel - [PATCH] perf/x86/uncore: export basic memory events for IVT IMC PMU

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Message-ID: <20140812060031.GA25239@quad>
Date:	Tue, 12 Aug 2014 08:00:31 +0200
From:	Stephane Eranian <eranian@...gle.com>
To:	linux-kernel@...r.kernel.org
Cc:	peterz@...radead.org, mingo@...e.hu, ak@...ux.intel.com,
	zheng.z.yan@...el.com
Subject: [PATCH] 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>
---
 arch/x86/kernel/cpu/perf_event_intel_uncore.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.c b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
index cfc6f9d..800e087 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
@@ -1391,6 +1391,7 @@ 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(),
 };
 
-- 
1.7.9.5

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