linux-kernel - [PATCH] perf: removed a non-existent event "L1-icache-prefetches" for AMD processors

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Message-Id: <1309211910-2803-1-git-send-email-zhengyuh@google.com>
Date:	Mon, 27 Jun 2011 14:58:30 -0700
From:	Zhengyu He <zhengyuh@...gle.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	tglx@...utronix.de, hpa@...or.com, x86@...nel.org,
	Stephane Eranian <eranian@...gle.com>,
	Venkatesh Pallipadi <venki@...gle.com>,
	linux-kernel@...r.kernel.org, Zhengyu He <zhengyuh@...gle.com>
Subject: [PATCH] perf: removed a non-existent event "L1-icache-prefetches" for AMD processors

According to AMD's "BIOS and Kernel Developer's Guide for AMD NPT Family
0Fh Processors"
(http://support.amd.com/us/Processor_TechDocs/32559.pdf), 0x4B is for
prefetch instructions dispatched, and 0x14B is for the load prefetch
instructions including Pretech and PrefetchT0/T1/T2. No event for the
instructions preteched into L1I cache is found.

Signed-off-by: Zhengyu He <zhengyuh@...gle.com>

resending

---
 arch/x86/kernel/cpu/perf_event_amd.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/cpu/perf_event_amd.c b/arch/x86/kernel/cpu/perf_event_amd.c
index fe29c1d..3b7f21d 100644
--- a/arch/x86/kernel/cpu/perf_event_amd.c
+++ b/arch/x86/kernel/cpu/perf_event_amd.c
@@ -29,7 +29,7 @@ static __initconst const u64 amd_hw_cache_event_ids
 		[ C(RESULT_MISS)   ] = -1,
 	},
 	[ C(OP_PREFETCH) ] = {
-		[ C(RESULT_ACCESS) ] = 0x014B, /* Prefetch Instructions :Load */
+		[ C(RESULT_ACCESS) ] = 0,
 		[ C(RESULT_MISS)   ] = 0,
 	},
  },
-- 
1.7.3.1

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