diff options
| author | David Ahern <dsahern@gmail.com> | 2012-07-20 17:25:47 -0600 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-07-25 11:27:55 -0300 |
| commit | 5cd95c2db479aa7a66f6fa572dfa410c6314c78e (patch) | |
| tree | ff169d69984b54677b26092df96df74f8144f593 /tools | |
| parent | f51304d3fe4fee475991ee424a4b7f85eec65a7b (diff) | |
| download | op-kernel-dev-5cd95c2db479aa7a66f6fa572dfa410c6314c78e.zip op-kernel-dev-5cd95c2db479aa7a66f6fa572dfa410c6314c78e.tar.gz | |
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>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/map.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c index a1f4e36..8668569 100644 --- a/tools/perf/util/map.c +++ b/tools/perf/util/map.c @@ -7,6 +7,7 @@ #include <stdio.h> #include <unistd.h> #include "map.h" +#include "thread.h" const char *map_type__name[MAP__NR_TYPES] = { [MAP__FUNCTION] = "Functions", @@ -585,7 +586,21 @@ int machine__init(struct machine *self, const char *root_dir, pid_t pid) self->kmaps.machine = self; self->pid = pid; self->root_dir = strdup(root_dir); - return self->root_dir == NULL ? -ENOMEM : 0; + if (self->root_dir == NULL) + return -ENOMEM; + + if (pid != HOST_KERNEL_ID) { + struct thread *thread = machine__findnew_thread(self, pid); + char comm[64]; + + if (thread == NULL) + return -ENOMEM; + + snprintf(comm, sizeof(comm), "[guest/%d]", pid); + thread__set_comm(thread, comm); + } + + return 0; } static void dsos__delete(struct list_head *self) |
