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4b2c4f1f1b
Add TSX event aliases, and export them from the kernel to perf. These are used by perf stat -T and to allow more user friendly access to events. The events are designed to be fairly generic and may also apply to other architectures implementing HTM. They all cover common situations that happens during tuning of transactional code. For Haswell we have to separate the HLE and RTM events, as they are separate in the PMU. This adds the following events: tx-start Count start transaction (used by perf stat -T) tx-commit Count commit of transaction tx-abort Count all aborts tx-conflict Count aborts due to conflict with another CPU. tx-capacity Count capacity aborts (transaction too large) Then matching el-* events for HLE cycles-t Transactional cycles (used by perf stat -T) * also exists on POWER8 cycles-ct Transactional cycles commited (used by perf stat -T) * according to Michael Ellerman POWER8 has a cycles-transactional-committed, * perf stat -T handles both cases Note for useful abort profiling often precise has to be set, as Haswell can only report the point inside the transaction with precise=2. For some classes of aborts, like conflicts, this is not needed, as it makes more sense to look at the complete critical section. This gives a clean set of generalized events to examine transaction success and aborts. Haswell has additional events for TSX, but those are more specialized for very specific situations. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1378438661-24765-4-git-send-email-andi@firstfloor.org Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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| boot | ||
| configs | ||
| crypto | ||
| ia32 | ||
| include | ||
| kernel | ||
| kvm | ||
| lguest | ||
| lib | ||
| math-emu | ||
| mm | ||
| net | ||
| oprofile | ||
| pci | ||
| platform | ||
| power | ||
| realmode | ||
| syscalls | ||
| tools | ||
| um | ||
| vdso | ||
| video | ||
| xen | ||
| .gitignore | ||
| Kbuild | ||
| Kconfig | ||
| Kconfig.cpu | ||
| Kconfig.debug | ||
| Makefile | ||
| Makefile.um | ||
| Makefile_32.cpu | ||