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generated by cgit 1.2.3-korg (git 2.43.0) at 2025-12-06 01:00:10 +0000
__release/core43-159 Intel wireless group's fork of linux.gitIntel wireless group
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authorStephane Eranian <eranian@google.com>2013-09-11 08:22:22 -0700
committerchrome-internal-fetch <chrome-internal-fetch@google.com>2014-05-15 23:51:34 +0000
commitb59ed31a8c36f6f6c8d88529de843724a79fdad0 (patch)
tree8e14c78d54a91c2624409f4ebff03103e47941ba /arch
parent7c582fd645400300652c7844d6ef1fa5b3cdbb0d (diff)
downloadchromeos-b59ed31a8c36f6f6c8d88529de843724a79fdad0.tar.gz
UPSTREAM: perf/x86: Add constraint for IVB CYCLE_ACTIVITY:CYCLES_LDM_PENDING
The IvyBridge event CYCLE_ACTIVITY:CYCLES_LDM_PENDING can only be measured on counters 0-3 when HT is off. When HT is on, you only have counters 0-3. If you program it on the eight counters for 1s on a 3GHz IVB laptop running a noploop, you see: 2 747 527 CYCLE_ACTIVITY:CYCLES_LDM_PENDING 2 747 527 CYCLE_ACTIVITY:CYCLES_LDM_PENDING 2 747 527 CYCLE_ACTIVITY:CYCLES_LDM_PENDING 2 747 527 CYCLE_ACTIVITY:CYCLES_LDM_PENDING 3 280 563 608 CYCLE_ACTIVITY:CYCLES_LDM_PENDING 3 280 563 608 CYCLE_ACTIVITY:CYCLES_LDM_PENDING 3 280 563 608 CYCLE_ACTIVITY:CYCLES_LDM_PENDING 3 280 563 608 CYCLE_ACTIVITY:CYCLES_LDM_PENDING Clearly the last 4 values are bogus. BUG=chromium:371570 TEST=`emerge-link chromeos-kernel-next` Signed-off-by: Stephane Eranian <eranian@google.com> Cc: peterz@infradead.org Cc: ak@linux.intel.com Cc: zheng.z.yan@intel.com Cc: dhsharp@google.com Link: http://lkml.kernel.org/r/20130911152222.GA28761@google.com Signed-off-by: Ingo Molnar <mingo@kernel.org> (cherry picked from commit 6113af14c82726d5a2993a7ba238df24c990a5ee) Signed-off-by: Sonny Rao <sonnyrao@chromium.org> Change-Id: I3f620ac7b8f755d1b07e48bf8bda9e47f5f804c4 Reviewed-on: https://chromium-review.googlesource.com/199983 Reviewed-by: Simon Que <sque@chromium.org> Tested-by: Sonny Rao <sonnyrao@chromium.org>