perf top: Handle 'z' key for toggle zeroing samples in TUI

The perf top TUI lacks 'z' key support to toggle sample zeroing.
Add it.

Reported-by: Stephane Eranian <eranian@google.com>
Tested-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1407831366-28892-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 1818d12..4892480 100644 (file)
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -10,6 +10,7 @@
 #include "../../util/pstack.h"
 #include "../../util/sort.h"
 #include "../../util/util.h"
+#include "../../util/top.h"
 #include "../../arch/common.h"
 
 #include "../browser.h"
@@ -1532,6 +1533,7 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
        "P             Print histograms to perf.hist.N\n"
        "t             Zoom into current Thread\n"
        "V             Verbose (DSO names in callchains, etc)\n"
+       "z             Toggle zeroing of samples\n"
        "/             Filter symbol by name";
 
        if (browser == NULL)
@@ -1632,6 +1634,13 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
                case 'F':
                        symbol_conf.filter_relative ^= 1;
                        continue;
+               case 'z':
+                       if (!is_report_browser(hbt)) {
+                               struct perf_top *top = hbt->arg;
+
+                               top->zero = !top->zero;
+                       }
+                       continue;
                case K_F1:
                case 'h':
                case '?':