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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2009-08-17 23:07:49 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-08-18 00:00:18 +0200 |
| commit | 4bf2364a951d3c043e132e4451d90c7bc74dee83 (patch) | |
| tree | 601f1b7147a0f498d704b464a4d43add530ae8b4 /tools/perf | |
| parent | 6ede59c412579303a25c11f93d4d262e100fc7e6 (diff) | |
| download | lwn-4bf2364a951d3c043e132e4451d90c7bc74dee83.tar.gz lwn-4bf2364a951d3c043e132e4451d90c7bc74dee83.zip | |
perf tools: Warn while running perf trace without sample
When a user runs perf trace using an input with logged
counters without PERF_SAMPLE_RAW attribute, warn by giving a
nice tip.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1250543271-8383-2-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/builtin-trace.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index b160a9f61bf3..88eef71bce6d 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -184,6 +184,10 @@ static int __cmd_trace(void) header = perf_header__read(input); sample_type = perf_header__sample_type(header); + if (!(sample_type & PERF_SAMPLE_RAW)) + die("No trace sample to read. Did you call perf record " + "without -R?"); + if (load_kernel() < 0) { perror("failed to load kernel symbols"); return EXIT_FAILURE; |