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

From: Pekka Enberg
Date: Fri Nov 20 2009 - 03:47:38 EST


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
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