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748e86aa90
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> |
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