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| author | Joerg Roedel <joerg.roedel@amd.com> | 2012-02-10 21:05:04 +0400 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-02-14 04:55:58 +0400 |
| commit | 0c095715b388d19d7a0b7e8eaceeceb018f5b3d1 (patch) | |
| tree | 5938972af1770fdd2c26866bebaf44e4e082948c /tools/perf/util/session.c | |
| parent | b52956c961be3a04182ae7b776623531601e0fb7 (diff) | |
| download | linux-0c095715b388d19d7a0b7e8eaceeceb018f5b3d1.tar.xz | |
perf top: Don't process samples with no valid machine object
The perf sample processing code relies on a valid machine object. Make
sure that this path is only entered when such a object exists.
A counter for samples where no machine object exits is also introduced
to give the user a message about these samples.
Reported-by: David Ahern <dsahern@gmail.com>
Reported-by: Jason Wang <jasowang@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1328893505-4115-2-git-send-email-joerg.roedel@amd.com
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/session.c')
| -rw-r--r-- | tools/perf/util/session.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index 552c1c50eea1..9f833cf9c6a9 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -796,6 +796,10 @@ static int perf_session_deliver_event(struct perf_session *session, ++session->hists.stats.nr_unknown_id; return -1; } + if (machine == NULL) { + ++session->hists.stats.nr_unprocessable_samples; + return -1; + } return tool->sample(tool, event, sample, evsel, machine); case PERF_RECORD_MMAP: return tool->mmap(tool, event, sample, machine); @@ -964,6 +968,12 @@ static void perf_session__warn_about_errors(const struct perf_session *session, session->hists.stats.nr_invalid_chains, session->hists.stats.nr_events[PERF_RECORD_SAMPLE]); } + + if (session->hists.stats.nr_unprocessable_samples != 0) { + ui__warning("%u unprocessable samples recorded.\n" + "Do you have a KVM guest running and not using 'perf kvm'?\n", + session->hists.stats.nr_unprocessable_samples); + } } #define session_done() (*(volatile int *)(&session_done)) |