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[v2,2/2] oslat: Add trace maker prior starting main thread

Message ID 20210714110718.68292-2-nsaenzju@redhat.com
State New
Headers show
Series [v2,1/2] rt-utils: Add option to avoid stopping tracing in tracemark() | expand

Commit Message

Nicolas Saenz Julienne July 14, 2021, 11:07 a.m. UTC 
After a long tracing session it's sometimes hard to find the moment
oslat started. So leave a message in the trace buffer just before the
main thread starts.

Signed-off-by: Nicolas Saenz Julienne <nsaenzju@redhat.com>
Acked-by: Peter Xu <peterx@redhat.com>
---

Changes since v1:
 - none

 src/oslat/oslat.c | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/src/oslat/oslat.c b/src/oslat/oslat.c
index d35be57..20bf02b 100644
--- a/src/oslat/oslat.c
+++ b/src/oslat/oslat.c
@@ -400,6 +400,10 @@  static void *thread_main(void *arg)
 	while (g.n_threads_running != g.n_threads)
 		relax();
 
+	if (!g.preheat)
+		tracemark(false, "%s: Starting thread on CPU %d.\n",
+			  g.app_name, t->core_i);
+
 	frc(&t->frc_start);
 	doit(t);
 	frc(&t->frc_stop);