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Patch "perf/x86: Fix Broadwell-EP DRAM RAPL events" has been added to the 4.9-stable tree

PATCH [email protected] 1 participant 1 message May 16, 2017

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This is a note to let you know that I've just added the patch titled

perf/x86: Fix Broadwell-EP DRAM RAPL events

to the 4.9-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-fix-broadwell-ep-dram-rapl-events.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From 33b88e708e7dfa58dc896da2a98f5719d2eb315c Mon Sep 17 00:00:00 2001

From: Vince Weaver <[email protected]>
Date: Tue, 2 May 2017 14:08:50 -0400
Subject: perf/x86: Fix Broadwell-EP DRAM RAPL events

From: Vince Weaver <[email protected]>

commit 33b88e708e7dfa58dc896da2a98f5719d2eb315c upstream.

It appears as though the Broadwell-EP DRAM units share the special units quirk with Haswell-EP/KNL.

Without this patch, you get really high results (a single DRAM using 20W of power).

The powercap driver in drivers/powercap/intel_rapl.c already has this change.

Signed-off-by Vince Weaver <[email protected]>
Cc Alexander Shishkin <[email protected]>
Cc Arnaldo Carvalho de Melo <[email protected]>
Cc Jiri Olsa <[email protected]>
Cc Kan Liang <[email protected]>
Cc Linus Torvalds <[email protected]>
Cc Peter Zijlstra <[email protected]>
Cc Stephane Eranian <[email protected]>
Cc Stephane Eranian <[email protected]>
Cc Thomas Gleixner <[email protected]>
Cc [email protected]
Signed-off-by Ingo Molnar <[email protected]>
Signed-off-by Greg Kroah-Hartman <[email protected]>
---
 arch/x86/events/intel/rapl.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
arch/x86/events/intel/rapl.c +1 -1
@@ -759,7 +759,7 @@ static const struct x86_cpu_id rapl_cpu_
 
 	X86_RAPL_MODEL_MATCH(INTEL_FAM6_BROADWELL_CORE,   hsw_rapl_init),
 	X86_RAPL_MODEL_MATCH(INTEL_FAM6_BROADWELL_GT3E,   hsw_rapl_init),
-	X86_RAPL_MODEL_MATCH(INTEL_FAM6_BROADWELL_X,	  hsw_rapl_init),
+	X86_RAPL_MODEL_MATCH(INTEL_FAM6_BROADWELL_X,	  hsx_rapl_init),
 	X86_RAPL_MODEL_MATCH(INTEL_FAM6_BROADWELL_XEON_D, hsw_rapl_init),
 
 	X86_RAPL_MODEL_MATCH(INTEL_FAM6_XEON_PHI_KNL, knl_rapl_init),

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/perf-x86-fix-broadwell-ep-dram-rapl-events.patch