1 files changed, 58 insertions, 1 deletions

diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index b27f21638207..fb5e49b3bc44 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -1392,6 +1392,7 @@ struct perf_script {
         bool                    show_switch_events;
         bool                    show_namespace_events;
         bool                    allocated;
+        bool                    per_event_dump;
         struct cpu_map          *cpus;
         struct thread_map       *threads;
         int                     name_width;
@@ -1438,7 +1439,7 @@ static void process_event(struct perf_script *script,
         struct thread *thread = al->thread;
         struct perf_event_attr *attr = &evsel->attr;
         unsigned int type = output_type(attr->type);
-        FILE *fp = stdout;
+        FILE *fp = evsel->priv;
 
         if (output[type].fields == 0)
                 return;
@@ -1887,6 +1888,52 @@ static void sig_handler(int sig __maybe_unused)
         session_done = 1;
 }
 
+static void perf_script__fclose_per_event_dump(struct perf_script *script)
+{
+        struct perf_evlist *evlist = script->session->evlist;
+        struct perf_evsel *evsel;
+
+        evlist__for_each_entry(evlist, evsel) {
+                if (!evsel->priv)
+                        break;
+                fclose(evsel->priv);
+                evsel->priv = NULL;
+        }
+}
+
+static int perf_script__fopen_per_event_dump(struct perf_script *script)
+{
+        struct perf_evsel *evsel;
+
+        evlist__for_each_entry(script->session->evlist, evsel) {
+                char filename[PATH_MAX];
+                snprintf(filename, sizeof(filename), "%s.%s.dump",
+                         script->session->file->path, perf_evsel__name(evsel));
+                evsel->priv = fopen(filename, "w");
+                if (evsel->priv == NULL)
+                        goto out_err_fclose;
+        }
+
+        return 0;
+
+out_err_fclose:
+        perf_script__fclose_per_event_dump(script);
+        return -1;
+}
+
+static int perf_script__setup_per_event_dump(struct perf_script *script)
+{
+        struct perf_evsel *evsel;
+
+        if (script->per_event_dump)
+                return perf_script__fopen_per_event_dump(script);
+
+        evlist__for_each_entry(script->session->evlist, evsel)
+                evsel->priv = stdout;
+
+        return 0;
+}
+
 static int __cmd_script(struct perf_script *script)
 {
         int ret;
@@ -1908,8 +1955,16 @@ static int __cmd_script(struct perf_script *script)
         if (script->show_namespace_events)
                 script->tool.namespaces = process_namespaces_event;
 
+        if (perf_script__setup_per_event_dump(script)) {
+                pr_err("Couldn't create the per event dump files\n");
+                return -1;
+        }
+
         ret = perf_session__process_events(script->session);
 
+        if (script->per_event_dump)
+                perf_script__fclose_per_event_dump(script);
+
         if (debug_mode)
                 pr_err("Misordered timestamps: %" PRIu64 "\n", nr_unordered);
 
@@ -2827,6 +2882,8 @@ int cmd_script(int argc, const char **argv)
                     "Show context switch events (if recorded)"),
         OPT_BOOLEAN('\0', "show-namespace-events", &script.show_namespace_events,
                     "Show namespace events (if recorded)"),
+        OPT_BOOLEAN('\0', "per-event-dump", &script.per_event_dump,
+                    "Dump trace output to files named by the monitored events"),
         OPT_BOOLEAN('f', "force", &symbol_conf.force, "don't complain, do it"),
         OPT_INTEGER(0, "max-blocks", &max_blocks,
                     "Maximum number of code blocks to dump with brstackinsn"),