-
Andi Kleen authored
Add support to perf stat to print the basic transactional execution statistics: Total cycles, Cycles in Transaction, Cycles in aborted transsactions using the in_tx and in_tx_checkpoint qualifiers. Transaction Starts and Elision Starts, to compute the average transaction length. This is a reasonable overview over the success of the transactions. Also support architectures that have a transaction aborted cycles counter like POWER8. Since that is awkward to handle in the kernel abstract handle both cases here. Enable with a new --transaction / -T option. This requires measuring these events in a group, since they depend on each other. This is implemented by using TM sysfs events exported by the kernel Signed-off-by:
Andi Kleen <ak@linux.intel.com> Acked-by:
Arnaldo Carvalho de Melo <acme@infradead.org> Signed-off-by:
Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1377128846-977-5-git-send-email-andi@firstfloor.orgSigned-off-by:
Ingo Molnar <mingo@kernel.org>
4cabc3d1