perf/x86: Add a native_perf_sched_clock_from_tsc()
authorAndi Kleen <ak@linux.intel.com>
Sun, 10 May 2015 19:22:39 +0000 (12:22 -0700)
committerIngo Molnar <mingo@kernel.org>
Tue, 4 Aug 2015 08:16:55 +0000 (10:16 +0200)
commita94cab2376cb35f236be14e2833cef63a8762a31
tree666ded02a83b67d8772bc771d61dd6d1ae863f05
parentb1bf72d6691cc33fc7763fc8ec77df42ca1a8702
perf/x86: Add a native_perf_sched_clock_from_tsc()

PEBSv3 has a raw TSC time stamp in its memory buffer that
later needs to to be converted to perf_clock.

Add a native_sched_clock_from_tsc() that works the same
as native_sched_clock(), but starts with an already given
TSC value.

Paravirt is ignored, it will just get the native clock.
But there isn't a para virtualized PEBS anyway.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: eranian@google.com
Link: http://lkml.kernel.org/r/1431285767-27027-2-git-send-email-andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/include/asm/tsc.h
arch/x86/kernel/tsc.c