Messages in this thread | | | Date | Thu, 14 Nov 2013 13:38:56 -0700 | From | David Ahern <> | Subject | Re: [PATCH] perf kvm record: Change the default value of perf_guest to 0. |
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On 11/14/13, 2:51 PM, Dongsheng Yang wrote: > Currently, we can not record the event counters of host to perf.data.host. > Example: > perf kvm --host record -a sleep 1 > [ perf record: Woken up 1 times to write data ] > [ perf record: Captured and wrote 0.625 MB perf.data.guest (~27290 samples) ]
perf kvm by definition wants --guest enabled. Host profiling is done with just 'perf record'; no need for the kvm layer at all. If you really want to go through perf-kvm to record host events disable guest actions:
$ perf kvm --host --no-guest record -a sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.029 MB perf.data.host (~1255 samples) ]
David
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