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| author | Ingo Molnar <mingo@elte.hu> | 2009-06-07 17:58:23 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-06-07 17:58:23 +0200 |
| commit | a14832ff977e78d1982cdf78cdabb1f2320d9ac8 (patch) | |
| tree | 84cb8282d4237f17d8c9ff50919947d1323f811c /tools | |
| parent | 30c806a094493beb7691bc7957dfa02dee96230a (diff) | |
| download | op-kernel-dev-a14832ff977e78d1982cdf78cdabb1f2320d9ac8.zip op-kernel-dev-a14832ff977e78d1982cdf78cdabb1f2320d9ac8.tar.gz | |
perf report: Print more expressive message in case of file open error
Before:
$ perf report
failed to open file: No such file or directory
After:
$ perf report
failed to open file: perf.data (try 'perf record' first)
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/builtin-report.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index 242e09f..f053a74 100644 --- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -1120,7 +1120,10 @@ static int __cmd_report(void) input = open(input_name, O_RDONLY); if (input < 0) { - perror("failed to open file"); + fprintf(stderr, " failed to open file: %s", input_name); + if (!strcmp(input_name, "perf.data")) + fprintf(stderr, " (try 'perf record' first)"); + fprintf(stderr, "\n"); exit(-1); } |
