Re: [PATCH] perf kvm record: Change the default value of perf_guestto 0.

[David Ahern]

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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