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perf-top: Show the percentage of successfull PEBS-fixups

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Use the PERF_RECORD_MISC_EXACT information to measure the success rate of
the PEBS fix-up.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: paulus@samba.org
Cc: eranian@google.com
Cc: robert.richter@amd.com
Cc: fweisbec@gmail.com
LKML-Reference: <20100304140100.694233760@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2010-03-04 14:19:36 +01:00 committed by Ingo Molnar
parent ef21f683a0
commit 1676b8a077
1 changed files with 9 additions and 3 deletions
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12
tools/perf/builtin-top.c
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@ -410,6 +410,7 @@ static double sym_weight(const struct sym_entry *sym)
static long samples;
static long userspace_samples;
static long exact_samples;
static const char CONSOLE_CLEAR[] = "";
static void __list_insert_active_sym(struct sym_entry *syme)
@ -450,6 +451,7 @@ static void print_sym_table(void)
int counter, snap = !display_weighted ? sym_counter : 0;
float samples_per_sec = samples/delay_secs;
float ksamples_per_sec = (samples-userspace_samples)/delay_secs;
float esamples_percent = (100.0*exact_samples)/samples;
float sum_ksamples = 0.0;
struct sym_entry *syme, *n;
struct rb_root tmp = RB_ROOT;
@ -457,7 +459,7 @@ static void print_sym_table(void)
int sym_width = 0, dso_width = 0, max_dso_width;
const int win_width = winsize.ws_col - 1;
samples = userspace_samples = 0;
samples = userspace_samples = exact_samples = 0;
/* Sort the active symbols */
pthread_mutex_lock(&active_symbols_lock);
@ -488,9 +490,10 @@ static void print_sym_table(void)
puts(CONSOLE_CLEAR);
printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
printf( " PerfTop:%8.0f irqs/sec kernel:%4.1f%% [",
printf( " PerfTop:%8.0f irqs/sec kernel:%4.1f%% exact: %4.1f%% [",
samples_per_sec,
100.0 - (100.0*((samples_per_sec-ksamples_per_sec)/samples_per_sec)));
100.0 - (100.0*((samples_per_sec-ksamples_per_sec)/samples_per_sec)),
esamples_percent);
if (nr_counters == 1 || !display_weighted) {
printf("%Ld", (u64)attrs[0].sample_period);
@ -954,6 +957,9 @@ static void event__process_sample(const event_t *self,
return;
}
if (self->header.misc & PERF_RECORD_MISC_EXACT)
exact_samples++;
if (event__preprocess_sample(self, session, &al, symbol_filter) < 0 ||
al.filtered)
return;