linux-kernel - [PATCH -tip RESEND] x86: perf_counter fix L1-data-Cache-Store-Referencees for AMD

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Date:	Sat, 20 Jun 2009 13:19:25 +0530
From:	Jaswinder Singh Rajput <jaswinder@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	x86 maintainers <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH -tip RESEND] x86: perf_counter fix
 L1-data-Cache-Store-Referencees for AMD


Fix AMD's Data Cache Refills from System event.

By this patch :

./tools/perf/perf stat -e l1d -e l1d-misses -e l1d-write -e l1d-prefetch -e l1d-prefetch-miss -e l1i -e l1i-misses -e l1i-prefetch -e l2 -e l2-misses -e l2-write -e dtlb -e dtlb-misses -e itlb -e itlb-misses -e bpu -e bpu-misses ls /dev/ > /dev/null

 Performance counter stats for 'ls /dev/':

        2499484  L1-data-Cache-Load-Referencees  (scaled from 3.97%)
          70347  L1-data-Cache-Load-Misses  (scaled from 7.30%)
           9360  L1-data-Cache-Store-Referencees  (scaled from 8.64%)
          32804  L1-data-Cache-Prefetch-Referencees  (scaled from 17.72%)
           7693  L1-data-Cache-Prefetch-Misses  (scaled from 22.97%)
        2180945  L1-instruction-Cache-Load-Referencees  (scaled from 28.48%)
          14518  L1-instruction-Cache-Load-Misses  (scaled from 35.00%)
           2405  L1-instruction-Cache-Prefetch-Referencees  (scaled from 34.89%)
          71387  L2-Cache-Load-Referencees  (scaled from 34.94%)
          18732  L2-Cache-Load-Misses  (scaled from 34.92%)
          79918  L2-Cache-Store-Referencees  (scaled from 36.02%)
        1295294  Data-TLB-Cache-Load-Referencees  (scaled from 35.99%)
          30896  Data-TLB-Cache-Load-Misses  (scaled from 33.36%)
        1222030  Instruction-TLB-Cache-Load-Referencees  (scaled from 29.46%)
            357  Instruction-TLB-Cache-Load-Misses  (scaled from 20.46%)
         530888  Branch-Cache-Load-Referencees  (scaled from 11.48%)
           8638  Branch-Cache-Load-Misses  (scaled from 5.09%)

    0.011295149  seconds time elapsed.

Earlier it always shows value 0.

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@...il.com>
---
 arch/x86/kernel/cpu/perf_counter.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c
index ce1ae3f..37facc5 100644
--- a/arch/x86/kernel/cpu/perf_counter.c
+++ b/arch/x86/kernel/cpu/perf_counter.c
@@ -401,7 +401,7 @@ static const u64 amd_hw_cache_event_ids
 		[ C(RESULT_MISS)   ] = 0x0041, /* Data Cache Misses          */
 	},
 	[ C(OP_WRITE) ] = {
-		[ C(RESULT_ACCESS) ] = 0x0042, /* Data Cache Refills from L2 */
+		[ C(RESULT_ACCESS) ] = 0x0142, /* Data Cache Refills :system */
 		[ C(RESULT_MISS)   ] = 0,
 	},
 	[ C(OP_PREFETCH) ] = {
-- 
1.6.0.6



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