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perf kvm: Update the 'record' man page entry for new --guest/--host behavior
As we have changed the default behavior of 'perf kvm' to --guest enabled, the parts of the man page that covers the 'record' subcommand are outdated. This patch updates it to show the correct output with --host/--guest/neither/both of them. Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/3a3a9c1e05acb5a274d1d8369db5a4c6467d6276.1386197481.git.yangds.fnst@cn.fujitsu.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -24,10 +24,17 @@ There are a couple of variants of perf kvm:
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of an arbitrary workload.
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'perf kvm record <command>' to record the performance counter profile
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of an arbitrary workload and save it into a perf data file. If both
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--host and --guest are input, the perf data file name is perf.data.kvm.
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If there is no --host but --guest, the file name is perf.data.guest.
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If there is no --guest but --host, the file name is perf.data.host.
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of an arbitrary workload and save it into a perf data file. We set the
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default behavior of perf kvm as --guest, so if neither --host nor --guest
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is input, the perf data file name is perf.data.guest. If --host is input,
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the perf data file name is perf.data.kvm. If you want to record data into
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perf.data.host, please input --host --no-guest. The behaviors are shown as
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following:
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Default('') -> perf.data.guest
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--host -> perf.data.kvm
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--guest -> perf.data.guest
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--host --guest -> perf.data.kvm
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--host --no-guest -> perf.data.host
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'perf kvm report' to display the performance counter profile information
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recorded via perf kvm record.
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