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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-08-22 22:55:25 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-08-26 22:25:45 +0200 |
| commit | adaa18bf5d9128c4a34f5350b1d46555a949ebc4 (patch) | |
| tree | e696206f823898094ed4cfde15140217d915899e /tools/perf/builtin-trace.c | |
| parent | perf trace: Add --verbose option (diff) | |
| download | linux-adaa18bf5d9128c4a34f5350b1d46555a949ebc4.tar.xz linux-adaa18bf5d9128c4a34f5350b1d46555a949ebc4.zip | |
perf trace: Hide sys_exit messages about syscall id = -1
That was reproduced via ftrace as described in this cset comment log,
need to investigate further.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-n1i3m0vo6mgq3ddjj95sls2s@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-trace.c')
| -rw-r--r-- | tools/perf/builtin-trace.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index c907e7e41a74..c3caabbe18fa 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -298,7 +298,22 @@ static struct syscall *trace__syscall_info(struct trace *trace, int id = perf_evsel__intval(evsel, sample, "id"); if (id < 0) { - fprintf(trace->output, "Invalid syscall %d id, skipping...\n", id); + + /* + * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried + * before that, leaving at a higher verbosity level till that is + * explained. Reproduced with plain ftrace with: + * + * echo 1 > /t/events/raw_syscalls/sys_exit/enable + * grep "NR -1 " /t/trace_pipe + * + * After generating some load on the machine. + */ + if (verbose > 1) { + static u64 n; + fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n", + id, perf_evsel__name(evsel), ++n); + } return NULL; } |