linux-kernel - [PATCH 2/5] sched/tracing: Show more info for funcgraph wakeup tracers

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Date:   Tue,  1 Jan 2019 23:46:11 +0800
From:   Changbin Du <changbin.du@...il.com>
To:     rostedt@...dmis.org
Cc:     mingo@...hat.com, corbet@....net, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, Changbin Du <changbin.du@...il.com>
Subject: [PATCH 2/5] sched/tracing: Show more info for funcgraph wakeup tracers

Add these info fields to funcgraph wakeup tracers:
  o Show CPU info since the waker could be on a different CPU.
  o Show function duration and overhead.
  o Show IRQ markers.

Signed-off-by: Changbin Du <changbin.du@...il.com>
---
 kernel/trace/trace_sched_wakeup.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index b6c5fa10347e..da5b6e012840 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -180,8 +180,11 @@ static void wakeup_trace_close(struct trace_iterator *iter)
 }
 
 #define GRAPH_TRACER_FLAGS (TRACE_GRAPH_PRINT_PROC | \
+			    TRACE_GRAPH_PRINT_CPU |  \
 			    TRACE_GRAPH_PRINT_REL_TIME | \
-			    TRACE_GRAPH_PRINT_DURATION)
+			    TRACE_GRAPH_PRINT_DURATION | \
+			    TRACE_GRAPH_PRINT_OVERHEAD | \
+			    TRACE_GRAPH_PRINT_IRQS)
 
 static enum print_line_t wakeup_print_line(struct trace_iterator *iter)
 {
-- 
2.17.1