diff options
| author | David Ahern | 2012-07-30 22:31:35 -0600 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo | 2012-08-03 10:43:47 -0300 |
| commit | 6b118e92cc78ccef7b54a296158d4738fd377bcc (patch) | |
| tree | b1c42124f171114af6db8b12994c0f926f31f607 /tools | |
| parent | 70b40c4a43ddfcf7a06dad4be32ff1dd2b62be09 (diff) | |
perf kvm top: Limit guest kernel info message to once
'perf kvm top' shows a continual flurry of:
Can't find guest [5201]'s kernel information
if it can't find the guest info and with a lot of VMs running a user has no
chance of reading them all. Limit message to once per guest.
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/1343709095-7089-5-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/builtin-top.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 34096275a7b5..68cd61ef6ac5 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -38,6 +38,7 @@ #include "util/cpumap.h" #include "util/xyarray.h" #include "util/sort.h" +#include "util/intlist.h" #include "util/debug.h" @@ -706,8 +707,16 @@ static void perf_event__process_sample(struct perf_tool *tool, int err; if (!machine && perf_guest) { - pr_err("Can't find guest [%d]'s kernel information\n", - event->ip.pid); + static struct intlist *seen; + + if (!seen) + seen = intlist__new(); + + if (!intlist__has_entry(seen, event->ip.pid)) { + pr_err("Can't find guest [%d]'s kernel information\n", + event->ip.pid); + intlist__add(seen, event->ip.pid); + } return; } |