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ftrace: add tracing_thresh to function profile

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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>
This commit is contained in:
Umesh Tiwari 2015-06-22 16:58:08 +05:30 committed by Steven Rostedt
parent 72ac426a5b
commit 8e436ca042
1 changed files with 7 additions and 2 deletions
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9
kernel/trace/ftrace.c
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@ -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)