perf/x86: Report TSX transaction abort cost as weight

Browse source

Use the existing weight reporting facility to report the transaction
abort cost, that is the number of cycles wasted in aborts.
Haswell reports this in the PEBS record.

This was in fact the original user for weight.

This is a very useful sort key to concentrate on the most
costly aborts and a good metric for TSX tuning.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1378438661-24765-3-git-send-email-andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

...

This commit is contained in:

Andi Kleen 2013-09-05 20:37:39 -07:00 • committed by Ingo Molnar

parent 2dbf0116aa

commit 748e86aa90

1 changed files with 42 additions and 13 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

55

arch/x86/kernel/cpu/perf_event_intel_ds.c

View file