perf hist: Clarify events_stats fields usage
The events_stats.total field is too generic, rename it to .total_period,
and also add a comment explaining that it is the sum of all the .period
fields in samples, that is needed because we use auto-freq to avoid
sampling artifacts.
Ditto for events_stats.lost, that is the sum of all lost_event.lost
fields, i.e. the number of events the kernel dropped.
Looking at the users, builtin-sched.c can make use of these fields and
stop doing it again.
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/newt.c b/tools/perf/util/newt.c
index ba6acd0..010bacf 100644
--- a/tools/perf/util/newt.c
+++ b/tools/perf/util/newt.c
@@ -689,7 +689,7 @@
}
snprintf(str, sizeof(str), "Samples: %Ld ",
- hists->stats.total);
+ hists->stats.total_period);
newtDrawRootText(0, 0, str);
newtGetScreenSize(NULL, &rows);
@@ -718,12 +718,12 @@
if (h->filtered)
continue;
- len = hist_entry__append_browser(h, self->tree, hists->stats.total);
+ len = hist_entry__append_browser(h, self->tree, hists->stats.total_period);
if (len > max_len)
max_len = len;
if (symbol_conf.use_callchain)
hist_entry__append_callchain_browser(h, self->tree,
- hists->stats.total, idx++);
+ hists->stats.total_period, idx++);
++curr_hist;
if (curr_hist % 5)
ui_progress__update(progress, curr_hist);