From 34886c8bc590f078d4c0b88f50d061326639198d Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Wed, 25 Mar 2009 21:00:47 -0400 Subject: [PATCH] tracing: add average time in function to function profiler Show the average time in the function (Time / Hit) Function Hit Time Avg -------- --- ---- --- mwait_idle 51 140326.6 us 2751.503 us smp_apic_timer_interrupt 47 3517.735 us 74.845 us schedule 10 2738.754 us 273.875 us __schedule 10 2732.857 us 273.285 us hrtimer_interrupt 47 1896.104 us 40.342 us irq_exit 56 1711.833 us 30.568 us __run_hrtimer 47 1315.589 us 27.991 us tick_sched_timer 47 1138.690 us 24.227 us do_softirq 56 1116.829 us 19.943 us __do_softirq 56 1066.932 us 19.052 us do_IRQ 9 926.153 us 102.905 us Signed-off-by: Steven Rostedt --- kernel/trace/ftrace.c | 21 ++++++++++++++------- 1 file changed, 14 insertions(+), 7 deletions(-) diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 4d90c916b2bb..c7f4a4be05dc 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -347,8 +347,10 @@ static int function_stat_cmp(void *p1, void *p2) static int function_stat_headers(struct seq_file *m) { #ifdef CONFIG_FUNCTION_GRAPH_TRACER - seq_printf(m, " Function Hit Time\n" - " -------- --- ----\n"); + seq_printf(m, " Function " + "Hit Time Avg\n" + " -------- " + "--- ---- ---\n"); #else seq_printf(m, " Function Hit\n" " -------- ---\n"); @@ -361,12 +363,9 @@ static int function_stat_show(struct seq_file *m, void *v) struct ftrace_profile *rec = v; char str[KSYM_SYMBOL_LEN]; #ifdef CONFIG_FUNCTION_GRAPH_TRACER - static struct trace_seq s; static DEFINE_MUTEX(mutex); - - mutex_lock(&mutex); - trace_seq_init(&s); - trace_print_graph_duration(rec->time, &s); + static struct trace_seq s; + unsigned long long avg; #endif kallsyms_lookup(rec->ip, NULL, NULL, NULL, str); @@ -374,6 +373,14 @@ static int function_stat_show(struct seq_file *m, void *v) #ifdef CONFIG_FUNCTION_GRAPH_TRACER seq_printf(m, " "); + avg = rec->time; + do_div(avg, rec->counter); + + mutex_lock(&mutex); + trace_seq_init(&s); + trace_print_graph_duration(rec->time, &s); + trace_seq_puts(&s, " "); + trace_print_graph_duration(avg, &s); trace_print_seq(m, &s); mutex_unlock(&mutex); #endif