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| Started by | Steven Rostedt <rostedt@goodmis.org> |
|---|---|
| First post | 2015-08-29 17:10 +0200 |
| Last post | 2015-08-29 17:10 +0200 |
| Articles | 1 — 1 participant |
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[for-next][PATCH 10/14] ftrace: add tracing_thresh to function profile Steven Rostedt <rostedt@goodmis.org> - 2015-08-29 17:10 +0200
| From | Steven Rostedt <rostedt@goodmis.org> |
|---|---|
| Date | 2015-08-29 17:10 +0200 |
| Subject | [for-next][PATCH 10/14] ftrace: add tracing_thresh to function profile |
| Message-ID | <q2PVv-5oQ-1@gated-at.bofh.it> |
From: Umesh Tiwari <umesh.t@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. 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> --- kernel/trace/ftrace.c | 9 +++++++-- 1 file 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) -- 2.4.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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