perf trace: Add option to show process COMM

[platform/adaptation/renesas_rcar/renesas_kernel.git] / tools / perf / builtin-trace.c

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 8a09ba3..be65843 100644 (file)
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -726,6 +726,7 @@ struct trace {
        struct intlist          *pid_list;
        bool                    sched;
        bool                    multiple_threads;
+       bool                    show_comm;
        double                  duration_filter;
        double                  runtime_ms;
 };
@@ -755,8 +756,11 @@ static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thre
        size_t printed = trace__fprintf_tstamp(trace, tstamp, fp);
        printed += fprintf_duration(duration, fp);
 
-       if (trace->multiple_threads)
+       if (trace->multiple_threads) {
+               if (trace->show_comm)
+                       printed += fprintf(fp, "%.14s/", thread->comm);
                printed += fprintf(fp, "%d ", thread->tid);
+       }
 
        return printed;
 }
@@ -1503,10 +1507,13 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
                        .mmap_pages    = 1024,
                },
                .output = stdout,
+               .show_comm = true,
        };
        const char *output_name = NULL;
        const char *ev_qualifier_str = NULL;
        const struct option trace_options[] = {
+       OPT_BOOLEAN(0, "comm", &trace.show_comm,
+                   "show the thread COMM next to its id"),
        OPT_STRING('e', "expr", &ev_qualifier_str, "expr",
                    "list of events to trace"),
        OPT_STRING('o', "output", &output_name, "file", "output file name"),