Re: [PATCH 0/5] perf: add support for capturing skid IP
From: Stephane Eranian
Date: Fri Jun 16 2017 - 15:15:21 EST
On Fri, Jun 16, 2017 at 10:50 AM, Andi Kleen <ak@xxxxxxxxxxxxxxx> wrote:
>> > Yeah, I think it is easier and more portable, especially on hardware with a
>> > PEBS-like mechanism but no branch buffer (like LBR). FYI, I did do a test
>> > implementation yesterday to evaluate the difficulty.
>> A more generalized usage of the feature is to evaluate the amount of skid
>> for any precise event.
> It should be always the same (one instruction), except for the control flow
> change case.
That's on Intel X86. What about the other arch?