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perf hists browser: Add 'L' hotkey to change percent limit 

Add 'L' key action to change the percent limit applied to both of hist
entries and callchains.

Suggested-by: Arnaldo Carvalho de Melo <acme@kernel.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1454508683-5735-4-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2016-02-03 23:11:23 +09:00 committed by Arnaldo Carvalho de Melo
parent 1ba2fc6de4
commit b62e8dfcda
1 changed files with 55 additions and 0 deletions
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55
tools/perf/ui/browsers/hists.c
View File

@ -2029,6 +2029,42 @@ static void hist_browser__update_nr_entries(struct hist_browser *hb)
hb->nr_non_filtered_entries = nr_entries;
}
static void hist_browser__update_percent_limit(struct hist_browser *hb,
double percent)
{
struct hist_entry *he;
struct rb_node *nd = rb_first(&hb->hists->entries);
u64 total = hists__total_period(hb->hists);
u64 min_callchain_hits = total * (percent / 100);
hb->min_pcnt = callchain_param.min_percent = percent;
if (!symbol_conf.use_callchain)
return;
while ((nd = hists__filter_entries(nd, hb->min_pcnt)) != NULL) {
he = rb_entry(nd, struct hist_entry, rb_node);
if (callchain_param.mode == CHAIN_GRAPH_REL) {
total = he->stat.period;
if (symbol_conf.cumulate_callchain)
total = he->stat_acc->period;
min_callchain_hits = total * (percent / 100);
}
callchain_param.sort(&he->sorted_chain, he->callchain,
min_callchain_hits, &callchain_param);
/* force to re-evaluate folding state of callchains */
he->init_have_children = false;
hist_entry__set_folding(he, false);
nd = rb_next(nd);
}
}
static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
const char *helpline,
bool left_exits,
@ -2064,6 +2100,7 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
"E Expand all callchains\n" \
"F Toggle percentage of filtered entries\n" \
"H Display column headers\n" \
"L Change percent limit\n" \
"m Display context menu\n" \
"S Zoom into current Processor Socket\n" \
@ -2219,6 +2256,24 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
top->zero = !top->zero;
}
continue;
case 'L':
if (ui_browser__input_window("Percent Limit",
"Please enter the value you want to hide entries under that percent.",
buf, "ENTER: OK, ESC: Cancel",
delay_secs * 2) == K_ENTER) {
char *end;
double new_percent = strtod(buf, &end);
if (new_percent < 0 || new_percent > 100) {
ui_browser__warning(&browser->b, delay_secs * 2,
"Invalid percent: %.2f", new_percent);
continue;
}
hist_browser__update_percent_limit(browser, new_percent);
hist_browser__reset(browser);
}
continue;
case K_F1:
case 'h':
case '?':