Messages in this thread | | | Date | Mon, 13 Jul 2015 14:39:44 -0400 | From | Steven Rostedt <> | Subject | Re: [PATCH] ftrace: add tracing_thresh to function profile |
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On Mon, 22 Jun 2015 16:58:08 +0530 Umesh Tiwari <umesh.t@samsung.com> wrote:
> From: Himanshu Maithani <himanshu.m@samsung.com> > > This patch extends tracing_thresh functionality to function profile tracer. > If tracing_thresh is set, print those entries only, > whose average is > tracing thresh. >
This should also have a Signed-off-by from Himanshu Miathani. If possible.
-- Steve
> Signed-off-by: Umesh Tiwari <umesh.t@samsung.com> > --- > kernel/trace/ftrace.c | 10 ++++++++-- > 1 file changed, 8 insertions(+), 2 deletions(-) > > diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c > index 4f22802..7a48a67 100644 > --- a/kernel/trace/ftrace.c > +++ b/kernel/trace/ftrace.c > @@ -600,13 +600,19 @@ static int function_stat_show(struct seq_file *m, void *v) > goto out; > } > > + /* moved above to avoid printing values < thresh */ > +#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)
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