perf annotate: Fix sizeof_sym_hist overflow issue

[firefly-linux-kernel-4.4.55.git] / tools / perf / builtin-stat.c

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index a96fb5c3bedb8f242f56e59c0468019120bac133..5ef88f760b122c802b33444c8bbb8ff968d40ff7 100644 (file)
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -1179,7 +1179,7 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
        OPT_STRING(0, "post", &post_cmd, "command",
                        "command to run after to the measured command"),
        OPT_UINTEGER('I', "interval-print", &stat_config.interval,
-                   "print counts at regular interval in ms (>= 100)"),
+                   "print counts at regular interval in ms (>= 10)"),
        OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
                     "aggregate counts per processor socket", AGGR_SOCKET),
        OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
@@ -1332,9 +1332,14 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
                thread_map__read_comms(evsel_list->threads);
 
        if (interval && interval < 100) {
-               pr_err("print interval must be >= 100ms\n");
-               parse_options_usage(stat_usage, options, "I", 1);
-               goto out;
+               if (interval < 10) {
+                       pr_err("print interval must be >= 10ms\n");
+                       parse_options_usage(stat_usage, options, "I", 1);
+                       goto out;
+               } else
+                       pr_warning("print interval < 100ms. "
+                                  "The overhead percentage could be high in some cases. "
+                                  "Please proceed with caution.\n");
        }
 
        if (perf_evlist__alloc_stats(evsel_list, interval))