Re: [RFC][PATCH 1/2] perf: Add 'perf kmem' tool

Pekka Enberg
2009-11-20T08:47:35Z

Ingo Molnar kirjoitti:
> Regarding patch 2 - can we set some definitive benchmark threshold for
> that? I.e. a list of must-have features in 'perf kmem' before we can do
> it? 100% information and analysis equivalency with kmemtrace-user tool?

I'd be interested to hear Eduard's comment on that.

That said, I'll try to find some time to test "perf kmem" and provide
feedback on that. I can ACK the patch when I'm happy with the output. :-)

I'm mostly interested in two scenarios: (1) getting a nice report on
worst fragmented call-sites (perf kmem needs symbol lookup) and (2)
doing "perf kmem record" on machine A (think embedded here) and then
"perf kmem report" on machine B. I haven't tried kmemtrace-user for a
while but it did support both of them quite nicely at some point.

Pekka