This is a note to let you know that I've just added the patch titled
perf/x86/intel: Use proper dTLB-load-misses event on IvyBridge
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
perf-x86-intel-use-proper-dtlb-load-misses-event-on-ivybridge.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 1996388e9f4e3444db8273bc08d25164d2967c21 Mon Sep 17 00:00:00 2001
From: Vince Weaver <[email protected]>
Date: Mon, 14 Jul 2014 15:33:25 -0400
Subject: perf/x86/intel: Use proper dTLB-load-misses event on IvyBridge
From: Vince Weaver <[email protected]>
commit 1996388e9f4e3444db8273bc08d25164d2967c21 upstream.
This was discussed back in February:
https://lkml.org/lkml/2014/2/18/956
But I never saw a patch come out of it.
On IvyBridge we share the SandyBridge cache event tables, but the
dTLB-load-miss event is not compatible. Patch it up after
the fact to the proper DTLB_LOAD_MISSES.DEMAND_LD_MISS_CAUSES_A_WALK
Signed-off-by: Vince Weaver <[email protected]>
Signed-off-by: Peter Zijlstra <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Linus Torvalds <[email protected]>
Link:
http://lkml.kernel.org/r/alpine.deb.2.11.1407141528200.17...@vincent-weaver-1.umelst.maine.edu
Signed-off-by: Ingo Molnar <[email protected]>
Cc: Hou Pengyang <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/x86/kernel/cpu/perf_event_intel.c | 3 +++
1 file changed, 3 insertions(+)
--- a/arch/x86/kernel/cpu/perf_event_intel.c
+++ b/arch/x86/kernel/cpu/perf_event_intel.c
@@ -2475,6 +2475,9 @@ __init int intel_pmu_init(void)
case 62: /* IvyBridge EP */
memcpy(hw_cache_event_ids, snb_hw_cache_event_ids,
sizeof(hw_cache_event_ids));
+ /* dTLB-load-misses on IVB is different than SNB */
+ hw_cache_event_ids[C(DTLB)][C(OP_READ)][C(RESULT_MISS)] =
0x8108; /* DTLB_LOAD_MISSES.DEMAND_LD_MISS_CAUSES_A_WALK */
+
memcpy(hw_cache_extra_regs, snb_hw_cache_extra_regs,
sizeof(hw_cache_extra_regs));
Patches currently in stable-queue which might be from [email protected]
are
queue-3.14/perf-x86-intel-use-proper-dtlb-load-misses-event-on-ivybridge.patch
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