Re: [PATCH] perf intel-pt: Synthesize cycle events

[Steinar H. Gunderson]

On Tue, Mar 15, 2022 at 10:11:54PM +0200, Adrian Hunter wrote:
> Sorry, my first suggestion has issues, but the second is better.

I tried your second one, but can't see much difference. The original and
your patched version still differ by a lot, and I still see various
non-branch instructions getting very tiny fractions. (PSB packets
_might_ be it, as there are ~1000 of them in the 165M-cycle trace.)

I guess the good news is that the perf report coming out of your version
looks more likely to me; I have some functions that are around 1% that
shouldn't intuitively be that much (and, if I write some Perl to sum up
the cycles from the IPC lines in perf script, are more around 0.1%).
So perhaps we should stop chasing the difference? I don't know.

/* Steinar */