On Mon, May 11, 2020 at 12:36 PM Jiri Olsa <[email protected]> wrote:
>
> On Thu, May 07, 2020 at 03:06:04PM -0700, Ian Rogers wrote:
> > When the event is passed as list, the default events should be listed as
> > per 'perf mem record -e list'. Previous behavior is:
> >
> > $ perf c2c record -e list
> > failed: event 'list' not found, use '-e list' to get list of available
> > events
> >
> > Usage: perf c2c record [<options>] [<command>]
> > or: perf c2c record [<options>] -- <command> [<options>]
> >
> > -e, --event <event> event selector. Use 'perf mem record -e list' to
> > list available events
> >
> > New behavior:
> >
> > $ perf c2c record -e list
> > ldlat-loads : available
> > ldlat-stores : available
> >
> > v3: is a rebase.
> > v2: addresses review comments by Jiri Olsa.
> > https://lore.kernel.org/lkml/20191127081844.GH32367@krava/
> > Signed-off-by: Ian Rogers <[email protected]>
> > ---
> > tools/perf/Documentation/perf-c2c.txt | 2 +-
> > tools/perf/builtin-c2c.c | 9 ++++++++-
> > tools/perf/builtin-mem.c | 24 +++++++-----------------
> > tools/perf/util/mem-events.c | 15 +++++++++++++++
> > tools/perf/util/mem-events.h | 2 ++
> > 5 files changed, 33 insertions(+), 19 deletions(-)
> >
> > diff --git a/tools/perf/Documentation/perf-c2c.txt
> > b/tools/perf/Documentation/perf-c2c.txt
> > index 2133eb320cb0..98efdab5fbd4 100644
> > --- a/tools/perf/Documentation/perf-c2c.txt
> > +++ b/tools/perf/Documentation/perf-c2c.txt
> > @@ -40,7 +40,7 @@ RECORD OPTIONS
> > --------------
> > -e::
> > --event=::
> > - Select the PMU event. Use 'perf mem record -e list'
> > + Select the PMU event. Use 'perf c2c record -e list'
> > to list available events.
> >
> > -v::
> > diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
> > index 1baf4cae086f..d617d5682c68 100644
> > --- a/tools/perf/builtin-c2c.c
> > +++ b/tools/perf/builtin-c2c.c
> > @@ -2887,8 +2887,15 @@ static int parse_record_events(const struct option
> > *opt,
> > {
> > bool *event_set = (bool *) opt->value;
> >
> > + if (!strcmp(str, "list")) {
> > + perf_mem_events__list();
> > + exit(0);
> > + }
> > + if (perf_mem_events__parse(str))
> > + exit(-1);
>
> won't this exit(-1) callsbreak the parsing stuff?
> like displaying the option values on error or such?
The previous code was:
- if (strcmp(str, "list")) {
This is handled explicitly in the code above this.
- if (!perf_mem_events__parse(str)) {
- mem->operation = 0;
- return 0;
- }
- exit(-1);
This is the code where the exit -1 happens, I inverted the comparison
so that exit was more the exceptional code path. The behavior should
be identical.
Thanks,
Ian
> other than that it looks ok to me
>
> jirka
>
