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authorDavid Ahern <dsahern@gmail.com>2012-07-20 17:25:47 -0600
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-07-25 11:27:55 -0300
commit5cd95c2db479aa7a66f6fa572dfa410c6314c78e (patch)
treeff169d69984b54677b26092df96df74f8144f593
parentf51304d3fe4fee475991ee424a4b7f85eec65a7b (diff)
downloadop-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>
-rw-r--r--tools/perf/util/map.c17
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)
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