提交 69cf0218 编写于 作者: A Arnaldo Carvalho de Melo 提交者: Ingo Molnar

perf hists: Print number of samples, not the period sum

So that we match the header where we state the number of events with the
"Samples" column when using 'perf report -n/--show-nr-samples':

 [root@emilia ~]# perf record -a sleep 1
 [ perf record: Woken up 1 times to write data ]
 [ perf record: Captured and wrote 0.111 MB perf.data (~4860 samples) ]
 [root@emilia ~]# perf report --stdio --show-nr-samples
 # Events: 11  cycles
 #
 # Overhead  Samples        Command       Shared Object                        Symbol
 # ........ ..........  ...........  ..................  ............................
 #
     16.65%          1        sleep  [kernel.kallsyms]   [k] unmap_vmas
     16.10%          1         perf  libpthread-2.12.so  [.] __pthread_cleanup_push_defer
     15.79%          2         perf  [kernel.kallsyms]   [k] format_decode
     12.88%          1  kworker/1:2  [kernel.kallsyms]   [k] cache_reap
     10.69%          1      swapper  [kernel.kallsyms]   [k] _raw_spin_lock
      7.55%          1        sleep  [kernel.kallsyms]   [k] prepare_exec_creds
      6.00%          1         perf  [jbd2]              [k] start_this_handle
      5.29%          1         perf  [kernel.kallsyms]   [k] seq_read
      4.75%          1         perf  [kernel.kallsyms]   [k] get_pid_task
      4.30%          1         perf  [kernel.kallsyms]   [k] _raw_spin_unlock_irqrestore

 #
 # (For a higher level overview, try: perf report --sort comm,dso)
 #
 [root@emilia ~]#
Reported-by: NStephane Eranian <eranian@google.com>
Reported-by: NCliff Wickman <cpw@sgi.com>
Acked-by: NStephane Eranian <eranian@google.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: <stable@kernel.org>
LKML-Reference: <new-submission>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
[ cherry-picked it from perf/core, as it has been reported by others as well. ]
Signed-off-by: NIngo Molnar <mingo@elte.hu>
上级 4a508dd2
......@@ -585,6 +585,7 @@ int hist_entry__snprintf(struct hist_entry *self, char *s, size_t size,
{
struct sort_entry *se;
u64 period, total, period_sys, period_us, period_guest_sys, period_guest_us;
u64 nr_events;
const char *sep = symbol_conf.field_sep;
int ret;
......@@ -593,6 +594,7 @@ int hist_entry__snprintf(struct hist_entry *self, char *s, size_t size,
if (pair_hists) {
period = self->pair ? self->pair->period : 0;
nr_events = self->pair ? self->pair->nr_events : 0;
total = pair_hists->stats.total_period;
period_sys = self->pair ? self->pair->period_sys : 0;
period_us = self->pair ? self->pair->period_us : 0;
......@@ -600,6 +602,7 @@ int hist_entry__snprintf(struct hist_entry *self, char *s, size_t size,
period_guest_us = self->pair ? self->pair->period_guest_us : 0;
} else {
period = self->period;
nr_events = self->nr_events;
total = session_total;
period_sys = self->period_sys;
period_us = self->period_us;
......@@ -640,9 +643,9 @@ int hist_entry__snprintf(struct hist_entry *self, char *s, size_t size,
if (symbol_conf.show_nr_samples) {
if (sep)
ret += snprintf(s + ret, size - ret, "%c%" PRIu64, *sep, period);
ret += snprintf(s + ret, size - ret, "%c%" PRIu64, *sep, nr_events);
else
ret += snprintf(s + ret, size - ret, "%11" PRIu64, period);
ret += snprintf(s + ret, size - ret, "%11" PRIu64, nr_events);
}
if (pair_hists) {
......
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