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authorUmesh Tiwari <umesh.t@samsung.com>2015-06-22 13:28:08 +0200
committerSteven Rostedt <rostedt@goodmis.org>2015-07-21 04:30:51 +0200
commit8e436ca042d904533a1e14fdc85f0facdfca752f (patch)
tree96448dc17ffb1e919481c69fe7cb2ae01ddab67d /kernel
parenttracing: Clean up stack tracing and fix fentry updates (diff)
downloadlinux-8e436ca042d904533a1e14fdc85f0facdfca752f.tar.xz
linux-8e436ca042d904533a1e14fdc85f0facdfca752f.zip
ftrace: add tracing_thresh to function profile
This patch extends tracing_thresh functionality to function profile tracer. If tracing_thresh is set, print those entries only, whose average is > tracing thresh. Link: http://lkml.kernel.org/r/1434972488-8571-1-git-send-email-umesh.t@samsung.com Signed-off-by: Umesh Tiwari <umesh.t@samsung.com> [ Removed unnecessary 'moved' comment ] Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/trace/ftrace.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 02bece4a99ea..f46dbb5cdf76 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -613,13 +613,18 @@ static int function_stat_show(struct seq_file *m, void *v)
goto out;
}
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ avg = rec->time;
+ do_div(avg, rec->counter);
+ if (tracing_thresh && (avg < tracing_thresh))
+ goto out;
+#endif
+
kallsyms_lookup(rec->ip, NULL, NULL, NULL, str);
seq_printf(m, " %-30.30s %10lu", str, rec->counter);
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
seq_puts(m, " ");
- avg = rec->time;
- do_div(avg, rec->counter);
/* Sample standard deviation (s^2) */
if (rec->counter <= 1)