Messages in this thread | | | Date | Fri, 15 Nov 2013 15:03:27 -0500 | From | Dongsheng Yang <> | Subject | Re: [PATCH] perf kvm record: Change the default value of perf_guest to 0. |
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Hi David:
On 11/14/2013 03:38 PM, David Ahern wrote: > 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
Thanx for your reply ! It makes sense.
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