perf script: Improve error msg when no first/last sample time found

The following message will be returned to user when executing 'perf
script --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/1515596433-24653-3-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 08bc818f371b8858a63cbc47fb72f1377ee64aad..ac781916e51e2af97964314d5e949e0d3605088b 100644 (file)
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -3449,7 +3449,9 @@ int cmd_script(int argc, const char **argv)
        if (perf_time__parse_str(script.ptime_range, script.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");
                        err = -EINVAL;
                        goto out_delete;
                }