perf hists browser: Warn about lost events
Just like the old perf top --tui and the --stdio version.
But because we have the initial menu to choose which event to show in a
session with multiple events we can see how many chunks were lost in
each of the event types, clarifying which events are being affected the
most.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-47yyqbubmjzch2chezmb21m6@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/ui/browser.c b/tools/perf/util/ui/browser.c
index d2051be..5568291 100644
--- a/tools/perf/util/ui/browser.c
+++ b/tools/perf/util/ui/browser.c
@@ -176,16 +176,29 @@
ui_browser__refresh(browser);
}
-int ui_browser__warning(struct ui_browser *browser, const char *format, ...)
+int ui_browser__warning(struct ui_browser *browser, int timeout,
+ const char *format, ...)
{
va_list args;
- int key;
+ char *text;
+ int key = 0, err;
va_start(args, format);
- while ((key = __ui__warning("Warning!", format, args)) == K_RESIZE)
- ui_browser__handle_resize(browser);
+ err = vasprintf(&text, format, args);
va_end(args);
+ if (err < 0) {
+ va_start(args, format);
+ ui_helpline__vpush(format, args);
+ va_end(args);
+ } else {
+ while ((key == ui__question_window("Warning!", text,
+ "Press any key...",
+ timeout)) == K_RESIZE)
+ ui_browser__handle_resize(browser);
+ free(text);
+ }
+
return key;
}