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| author | Jin Yao <yao.jin@linux.intel.com> | 2018-01-10 16:00:26 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-01-17 14:23:34 +0100 |
| commit | eb0b419eff8cf51af8e16cc8c5d2a92d19824266 (patch) | |
| tree | cd11cef74729146a9b3533b9a5021fd8ea3a77af /tools/perf/builtin-report.c | |
| parent | perf callchains: Ask for PERF_RECORD_MMAP for data mmaps for DWARF unwinding (diff) | |
| download | linux-eb0b419eff8cf51af8e16cc8c5d2a92d19824266.tar.xz linux-eb0b419eff8cf51af8e16cc8c5d2a92d19824266.zip | |
perf report: Improve error msg when no first/last sample time found
The following message will be returned to user when executing
'perf report --time' if perf data file doesn't contain the
first/last sample time.
"HINT: no first/last sample time found in perf data.
Please use latest perf binary to execute 'perf record'
(if '--buildid-all' is enabled, needs to set '--timestamp-boundary')."
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Reviewed-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1515596433-24653-2-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-report.c')
| -rw-r--r-- | tools/perf/builtin-report.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index 6593779224d5..7d4f0a5de326 100644 --- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -1300,7 +1300,9 @@ repeat: if (perf_time__parse_str(report.ptime_range, report.time_str) != 0) { if (session->evlist->first_sample_time == 0 && session->evlist->last_sample_time == 0) { - pr_err("No first/last sample time in perf data\n"); + pr_err("HINT: no first/last sample time found in perf data.\n" + "Please use latest perf binary to execute 'perf record'\n" + "(if '--buildid-all' is enabled, please set '--timestamp-boundary').\n"); return -EINVAL; } |