Hi,
On Fri, 8 Jun 2012 16:23:27 +0400, Dmitry Antipov wrote:
> Use trace_find_event to find event name before looking through
> /sys files. This helps 'perf report' to show real event names
> instead of 'unknown:unknown' when processing perf.data recorded
> on another machine.
>
Right, it should be a default action for a tracepoint event IMHO. (But
this patch doesn't check it's a tracepoint) There are a lot of places
call event_name() to be converted like this, so I suggest changing
event_name itself (or recent perf_evsel__name() ?) instead of just a
call-site. It might require checking whether the pevent is initialized
and if not, falls back to the sysfs walking.
Thanks,
Namhyung
> Signed-off-by: Dmitry Antipov <dmitry.anti...@linaro.org>
> ---
> tools/perf/builtin-report.c | 4 +++-
> 1 files changed, 3 insertions(+), 1 deletions(-)
>
> diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
> index 8c767c6..a6fd309 100644
> --- a/tools/perf/builtin-report.c
> +++ b/tools/perf/builtin-report.c
> @@ -24,6 +24,7 @@
> #include "util/evlist.h"
> #include "util/evsel.h"
> #include "util/header.h"
> +#include "util/trace-event.h"
> #include "util/session.h"
> #include "util/tool.h"
>
> @@ -314,7 +315,8 @@ static int perf_evlist__tty_browse_hists(struct
> perf_evlist *evlist,
>
> list_for_each_entry(pos, &evlist->entries, node) {
> struct hists *hists = &pos->hists;
> - const char *evname = event_name(pos);
> + struct event_format *event = trace_find_event(pos->attr.config);
> + const char *evname = event ? event->name : event_name(pos);
>
> hists__fprintf_nr_sample_events(hists, evname, stdout);
> hists__fprintf(hists, NULL, false, true, 0, 0, stdout);
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