perf report: Separate out idle threads
Introduce the special comm name [idle] for idle theads.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/Documentation/perf_counter/builtin-report.c b/Documentation/perf_counter/builtin-report.c
index 19c1e05..6d68f3a 100644
--- a/Documentation/perf_counter/builtin-report.c
+++ b/Documentation/perf_counter/builtin-report.c
@@ -612,6 +612,17 @@
return ret;
}
+static void register_idle_thread(void)
+{
+ struct thread *thread = threads__findnew(0);
+
+ if (thread == NULL ||
+ thread__set_comm(thread, "[idle]")) {
+ fprintf(stderr, "problem inserting idle task.\n");
+ exit(-1);
+ }
+}
+
static int __cmd_report(void)
{
@@ -626,6 +637,8 @@
char cwd[PATH_MAX], *cwdp = cwd;
int cwdlen;
+ register_idle_thread();
+
input = open(input_name, O_RDONLY);
if (input < 0) {
perror("failed to open file");