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perf_counter tools: Allow perf top top users to switch between weighted and individual counter display

Browse source 
Add [w]eighted hotkey.  Pressing [w] toggles between displaying
weighted total of all counters, and the counter selected via
[E]vent select key.

------------------------------------------------------------------------------
   PerfTop:   90395 irqs/sec  kernel:16.1% [cache-misses/cache-references/instructions],  (all, 4 CPUs)
------------------------------------------------------------------------------

  weight     samples    pcnt         RIP          kernel function
  ______     _______   _____   ________________   _______________

1275408.6      10881 -  5.3% - ffffffff81146f70 : copy_page_c
 553683.4      43569 - 21.3% - ffffffff81146f20 : clear_page_c
  74075.0       6768 -  3.3% - ffffffff81147190 : copy_user_generic_string
  40602.9       7538 -  3.7% - ffffffff81284ba2 : _spin_lock
  26882.1        965 -  0.5% - ffffffff8109d280 : file_ra_state_init

[w]

------------------------------------------------------------------------------
   PerfTop:   91221 irqs/sec  kernel:14.5% [10000Hz cache-misses],  (all, 4 CPUs)
------------------------------------------------------------------------------

  weight     samples    pcnt         RIP          kernel function
  ______     _______   _____   ________________   _______________

            47320.00 - 22.3% - ffffffff81146f20 : clear_page_c
            14261.00 -  6.7% - ffffffff810992f5 : __rmqueue
            11046.00 -  5.2% - ffffffff81146f70 : copy_page_c
             7842.00 -  3.7% - ffffffff81284ba2 : _spin_lock
             7234.00 -  3.4% - ffffffff810aa1d6 : unmap_vmas

Signed-off-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Mike Galbraith 2009-07-24 10:09:50 +02:00 committed by Ingo Molnar
parent 923c42c199
commit 46ab976443
1 changed files with 17 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

24
tools/perf/builtin-top.c
View file

@ -90,6 +90,7 @@ static char *sym_filter = NULL;
struct sym_entry *sym_filter_entry = NULL; struct sym_entry *sym_filter_entry = NULL;
static int sym_pcnt_filter = 5; static int sym_pcnt_filter = 5;
static int sym_counter = 0; static int sym_counter = 0;
static int display_weighted = -1;
/* /*
* Symbols * Symbols
@ -354,6 +355,9 @@ static double sym_weight(const struct sym_entry *sym)
double weight = sym->snap_count; double weight = sym->snap_count;
int counter; int counter;
if (!display_weighted)
return weight;
for (counter = 1; counter < nr_counters-1; counter++) for (counter = 1; counter < nr_counters-1; counter++)
weight *= sym->count[counter]; weight *= sym->count[counter];
@ -401,7 +405,7 @@ static void rb_insert_active_sym(struct rb_root *tree, struct sym_entry *se)
static void print_sym_table(void) static void print_sym_table(void)
{ {
int printed = 0, j; int printed = 0, j;
int counter; int counter, snap = !display_weighted ? sym_counter : 0;
float samples_per_sec = samples/delay_secs; float samples_per_sec = samples/delay_secs;
float ksamples_per_sec = (samples-userspace_samples)/delay_secs; float ksamples_per_sec = (samples-userspace_samples)/delay_secs;
float sum_ksamples = 0.0; float sum_ksamples = 0.0;
@ -417,7 +421,7 @@ static void print_sym_table(void)
pthread_mutex_unlock(&active_symbols_lock); pthread_mutex_unlock(&active_symbols_lock);
list_for_each_entry_safe_from(syme, n, &active_symbols, node) { list_for_each_entry_safe_from(syme, n, &active_symbols, node) {
syme->snap_count = syme->count[0]; syme->snap_count = syme->count[snap];
if (syme->snap_count != 0) { if (syme->snap_count != 0) {
syme->weight = sym_weight(syme); syme->weight = sym_weight(syme);
rb_insert_active_sym(&tmp, syme); rb_insert_active_sym(&tmp, syme);
@ -437,7 +441,7 @@ static void print_sym_table(void)
samples_per_sec, 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)));
if (nr_counters == 1) { if (nr_counters == 1 || !display_weighted) {
printf("%Ld", (u64)attrs[0].sample_period); printf("%Ld", (u64)attrs[0].sample_period);
if (freq) if (freq)
printf("Hz "); printf("Hz ");
@ -445,7 +449,9 @@ static void print_sym_table(void)
printf(" "); printf(" ");
} }
for (counter = 0; counter < nr_counters; counter++) { if (!display_weighted)
printf("%s", event_name(sym_counter));
else for (counter = 0; counter < nr_counters; counter++) {
if (counter) if (counter)
printf("/"); printf("/");
@ -495,7 +501,7 @@ static void print_sym_table(void)
pcnt = 100.0 - (100.0 * ((sum_ksamples - syme->snap_count) / pcnt = 100.0 - (100.0 * ((sum_ksamples - syme->snap_count) /
sum_ksamples)); sum_ksamples));
if (nr_counters == 1) if (nr_counters == 1 || !display_weighted)
printf("%20.2f - ", syme->weight); printf("%20.2f - ", syme->weight);
else else
printf("%9.1f %10ld - ", syme->weight, syme->snap_count); printf("%9.1f %10ld - ", syme->weight, syme->snap_count);
@ -594,13 +600,14 @@ static void print_known_keys(void)
fprintf(stdout, "\nknown keys:\n"); fprintf(stdout, "\nknown keys:\n");
fprintf(stdout, "\t[d] select display delay.\n"); fprintf(stdout, "\t[d] select display delay.\n");
fprintf(stdout, "\t[e] select display entries (lines).\n"); fprintf(stdout, "\t[e] select display entries (lines).\n");
fprintf(stdout, "\t[E] select annotation event counter.\n"); fprintf(stdout, "\t[E] active event counter. \t(%s)\n", event_name(sym_counter));
fprintf(stdout, "\t[f] select normal display count filter.\n"); fprintf(stdout, "\t[f] select normal display count filter.\n");
fprintf(stdout, "\t[F] select annotation display count filter (percentage).\n"); fprintf(stdout, "\t[F] select annotation display count filter (percentage).\n");
fprintf(stdout, "\t[qQ] quit.\n"); fprintf(stdout, "\t[qQ] quit.\n");
fprintf(stdout, "\t[s] select annotation symbol and start annotation.\n"); fprintf(stdout, "\t[s] select annotation symbol and start annotation.\n");
fprintf(stdout, "\t[S] stop annotation, revert to normal display.\n"); fprintf(stdout, "\t[S] stop annotation, revert to normal display.\n");
fprintf(stdout, "\t[z] toggle event count zeroing.\n"); fprintf(stdout, "\t[w] toggle display weighted/count[E]r. \t(%d)\n", display_weighted ? 1 : 0);
fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", zero ? 1 : 0);
} }
static void handle_keypress(int c) static void handle_keypress(int c)
@ -656,6 +663,9 @@ repeat:
pthread_mutex_unlock(&syme->source_lock); pthread_mutex_unlock(&syme->source_lock);
} }
break; break;
case 'w':
display_weighted = ~display_weighted;
break;
case 'z': case 'z':
zero = ~zero; zero = ~zero;
break; break;