Messages in this thread | | | Date | Tue, 23 Jun 2009 16:21:22 +0200 | From | Brice Goglin <> | Subject | Re: [perf] howto switch from pfmon |
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Ingo Molnar wrote: > You can also do a profile with such events: > > perf record -f -e r1000ffe0 ./hackbench 10 > > and look at it via 'perf report'. >
I am not sure what the perf.data profile file contains but 'perf report' only shows percentages. Is there a way to get a 'perf stat'-like output from 'perf report'? Or maybe just have a -f option in 'perf stat' to send the output into a file (with the PID in the name).
By the way, there's a typo in the description in tools/perf/Documentation/perf-report.txt, you want s/via perf report/via perf record/
> [ Note, there's no need to specify any --follow-* flags as that is > implicit in 'perf'. (and you'll probably also notice that perf > stat is a lot faster at following fast-forking or > context-switching workloads than is pfmon, because it's not ptrace > based.) ] >
What about threads? I didn't find any way to get per-thread counters.
Ideally, I'd like to be able to see no perf-related output on stdout/stderr at runtime, and later have a look at per-thread counters like 'perf stat' does at runtime.
thanks, Brice
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