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Groups > linux.kernel > #1169859
| From | Umesh Tiwari <umesh.t@samsung.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH] ftrace: add tracing_thresh to function profile |
| Date | 2015-06-22 13:40 +0200 |
| Message-ID | <pE8f0-2pg-1@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
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. 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) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in Please read the FAQ at http://www.tux.org/lkml/
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[PATCH] ftrace: add tracing_thresh to function profile Umesh Tiwari <umesh.t@samsung.com> - 2015-06-22 13:40 +0200
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