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perf_counter tools: kerneltop: display per function percentage along with event count 

------------------------------------------------------------------------------
 KernelTop:   90551 irqs/sec  kernel:15.0% [NMI, 100000 CPU cycles],  (all, 4 CPUs)
------------------------------------------------------------------------------

             events    pcnt         RIP          kernel function
  ______     ______   _____   ________________   _______________

           16871.00 - 19.1% - ffffffff80328e20 : clear_page_c
            8810.00 -  9.9% - ffffffff8048ce80 : page_fault
            4746.00 -  5.4% - ffffffff8048cae2 : _spin_lock
            4428.00 -  5.0% - ffffffff80328e70 : copy_page_c
            3340.00 -  3.8% - ffffffff80329090 : copy_user_generic_string!
            2679.00 -  3.0% - ffffffff8028a16b : get_page_from_freelist
            2254.00 -  2.5% - ffffffff80296f19 : unmap_vmas
            2082.00 -  2.4% - ffffffff80297e19 : handle_mm_fault
            1754.00 -  2.0% - ffffffff80288dc8 : __rmqueue_smallest
            1553.00 -  1.8% - ffffffff8048ca58 : _spin_lock_irqsave
            1400.00 -  1.6% - ffffffff8028cdc8 : release_pages
            1337.00 -  1.5% - ffffffff80285400 : find_get_page
            1335.00 -  1.5% - ffffffff80225a23 : do_page_fault
            1299.00 -  1.5% - ffffffff802ba8e7 : __d_lookup
            1174.00 -  1.3% - ffffffff802b38f3 : __link_path_walk
            1155.00 -  1.3% - ffffffff802843e1 : perf_swcounter_ctx_event!
            1137.00 -  1.3% - ffffffff8028d118 : ____pagevec_lru_add
             963.00 -  1.1% - ffffffff802a670b : kmem_cache_alloc
             885.00 -  1.0% - ffffffff8024bc61 : __wake_up_bit

Display per function percentage along with event count.

Signed-off-by: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Mike Galbraith 2009-04-02 10:40:28 +02:00 committed by Ingo Molnar
parent bce379bf35
commit 6278af660f
1 changed files with 23 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
Documentation/perf_counter/kerneltop.c
View File

@ -636,16 +636,20 @@ static void print_sym_table(void)
int counter;
float events_per_sec = events/delay_secs;
float kevents_per_sec = (events-userspace_events)/delay_secs;
float sum_kevents = 0.0;
events = userspace_events = 0;
memcpy(tmp, sym_table, sizeof(sym_table[0])*sym_table_count);
qsort(tmp, sym_table_count, sizeof(tmp[0]), compare);
for (i = 0; i < sym_table_count && tmp[i].count[0]; i++)
sum_kevents += tmp[i].count[0];
write(1, CONSOLE_CLEAR, strlen(CONSOLE_CLEAR));
printf(
"------------------------------------------------------------------------------\n");
printf( " KernelTop:%8.0f irqs/sec kernel:%3.1f%% [%s, ",
printf( " KernelTop:%8.0f irqs/sec kernel:%4.1f%% [%s, ",
events_per_sec,
100.0 - (100.0*((events_per_sec-kevents_per_sec)/events_per_sec)),
nmi ? "NMI" : "IRQ");
@ -679,34 +683,31 @@ static void print_sym_table(void)
printf("------------------------------------------------------------------------------\n\n");
if (nr_counters == 1)
printf(" events");
printf(" events pcnt");
else
printf(" weight events");
printf(" weight events pcnt");
printf(" RIP kernel function\n"
" ______ ______ ________________ _______________\n\n"
" ______ ______ _____ ________________ _______________\n\n"
);
printed = 0;
for (i = 0; i < sym_table_count; i++) {
for (i = 0, printed = 0; i < sym_table_count; i++) {
float pcnt;
int count;
if (nr_counters == 1) {
if (printed <= 18 &&
tmp[i].count[0] >= count_filter) {
printf("%19.2f - %016llx : %s\n",
sym_weight(tmp + i), tmp[i].addr, tmp[i].sym);
printed++;
}
} else {
if (printed <= 18 &&
tmp[i].count[0] >= count_filter) {
printf("%8.1f %10ld - %016llx : %s\n",
sym_weight(tmp + i),
tmp[i].count[0],
tmp[i].addr, tmp[i].sym);
printed++;
}
if (printed <= 18 && tmp[i].count[0] >= count_filter) {
pcnt = 100.0 - (100.0*((sum_kevents-tmp[i].count[0])/sum_kevents));
if (nr_counters == 1)
printf("%19.2f - %4.1f%% - %016llx : %s\n",
sym_weight(tmp + i),
pcnt, tmp[i].addr, tmp[i].sym);
else
printf("%8.1f %10ld - %4.1f%% - %016llx : %s\n",
sym_weight(tmp + i),
tmp[i].count[0],
pcnt, tmp[i].addr, tmp[i].sym);
printed++;
}
/*
* Add decay to the counts: