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perf tools: Fix lost and unknown events handling

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Fix it by explaining what can be happening and giving the number of processed
and lost events.

Also holler if unknown events were found, that can be due to processing a
perf.data file collected using a newer tool where newer events got added on
reporting using an older perf tool, that or a bug, so ask for a report to be
made.

Works on both --tui and --stdio.

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2010-11-27 02:41:01 -02:00
parent 008f29d386
commit 068ffaa8bf
4 changed files with 46 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
tools/perf/util/debug.c
View File

@ -46,6 +46,17 @@ int dump_printf(const char *fmt, ...)
return ret;
}
#ifdef NO_NEWT_SUPPORT
void ui__warning(const char *format, ...)
{
va_list args;
va_start(args, format);
vfprintf(stderr, format, args);
va_end(args);
}
#endif
static int dump_printf_color(const char *fmt, const char *color, ...)
{
va_list args;

2
tools/perf/util/debug.h
View File

@ -35,4 +35,6 @@ int ui_helpline__show_help(const char *format, va_list ap);
#include "ui/progress.h"
#endif
void ui__warning(const char *format, ...) __attribute__((format(printf, 1, 2)));
#endif /* __PERF_DEBUG_H */

18
tools/perf/util/session.c
View File

@ -852,6 +852,24 @@ done:
flush_sample_queue(self, ops);
out_err:
ui_progress__delete(progress);
if (ops->lost == event__process_lost &&
self->hists.stats.total_lost != 0) {
ui__warning("Processed %Lu events and LOST %Lu!\n\n"
"Check IO/CPU overload!\n\n",
self->hists.stats.total_period,
self->hists.stats.total_lost);
}
if (self->hists.stats.nr_unknown_events != 0) {
ui__warning("Found %u unknown events!\n\n"
"Is this an older tool processing a perf.data "
"file generated by a more recent tool?\n\n"
"If that is not the case, consider "
"reporting to linux-kernel@vger.kernel.org.\n\n",
self->hists.stats.nr_unknown_events);
}
return err;
}

16
tools/perf/util/ui/util.c
View File

@ -104,10 +104,24 @@ out_destroy_form:
return rc;
}
static const char yes[] = "Yes", no[] = "No";
static const char yes[] = "Yes", no[] = "No",
warning_str[] = "Warning!", ok[] = "Ok";
bool ui__dialog_yesno(const char *msg)
{
/* newtWinChoice should really be accepting const char pointers... */
return newtWinChoice(NULL, (char *)yes, (char *)no, (char *)msg) == 1;
}
void ui__warning(const char *format, ...)
{
va_list args;
va_start(args, format);
if (use_browser > 0)
newtWinMessagev((char *)warning_str, (char *)ok,
(char *)format, args);
else
vfprintf(stderr, format, args);
va_end(args);
}