perf kvm: Set name for VM process in guest machine
authorDavid Ahern <dsahern@gmail.com>
Fri, 20 Jul 2012 23:25:47 +0000 (17:25 -0600)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Wed, 25 Jul 2012 14:27:55 +0000 (11:27 -0300)
commit5cd95c2db479aa7a66f6fa572dfa410c6314c78e
treeff169d69984b54677b26092df96df74f8144f593
parentf51304d3fe4fee475991ee424a4b7f85eec65a7b
perf kvm: Set name for VM process in guest machine

COMM events are not generated in the context of a guest machine, so the
thread name is never set for the VMM process. For example, the qemu-kvm
name applies to the process in the host machine, not the guest machine.
So, samples for guest machines are currently displayed as:

    99.67%     :5671  [unknown]         [g] 0xffffffff81366b41

where 5671 is the pid of the VMM. With this patch the samples in the guest
machine are shown as:

    18.43%  [guest/5671]  [unknown]           [g] 0xffffffff810d68b7

Tested-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1342826756-64663-3-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/util/map.c