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| author | Umesh Tiwari <umesh.t@samsung.com> | 2015-06-22 13:28:08 +0200 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2015-07-21 04:30:51 +0200 |
| commit | 8e436ca042d904533a1e14fdc85f0facdfca752f (patch) | |
| tree | 96448dc17ffb1e919481c69fe7cb2ae01ddab67d | |
| parent | tracing: Clean up stack tracing and fix fentry updates (diff) | |
| download | linux-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>
| -rw-r--r-- | kernel/trace/ftrace.c | 9 |
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) |