perf: Add cycles to branch_info
authorAndi Kleen <ak@linux.intel.com>
Sun, 10 May 2015 19:22:42 +0000 (12:22 -0700)
committerIngo Molnar <mingo@kernel.org>
Tue, 4 Aug 2015 08:16:57 +0000 (10:16 +0200)
commit71ef3c6b9d4665ee7afbbe4c208a98917dcfc32f
tree821dbc9d7c99191ce6d3027da537838966a209f9
parentb83ff1c8617aac03a1cf807aafa848fe0f0908f2
perf: Add cycles to branch_info

Intel Skylake supports reporting the time in cycles a branch in the LBR
took, to give a rough indication of the basic block performance.

Export the cycle information in the branch_info structure.
This can be done by just reusing some currently zero padding.

This is just the generic header change. The architecture
still needs to fill it in.

There's no attempt to convert to real time, as we really
want cycles here.

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/1431285767-27027-5-git-send-email-andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
include/uapi/linux/perf_event.h