Re: [PATCH v3 4/9] perf mem: Only initialize memory event for recording

[Ian Rogers]

On Tue, Oct 27, 2020 at 11:38 PM Leo Yan <leo.yan@xxxxxxxxxx> wrote:
>
> It's needless to initialize memory events for reporting, this patch
> moves memory event initialization for only recording.  Furthermore,
> the change allows to parse perf data on cross platforms, e.g. perf
> tool can report result properly even the machine doesn't support
> the memory events.
>
> Signed-off-by: Leo Yan <leo.yan@xxxxxxxxxx>

Acked-by: Ian Rogers <irogers@xxxxxxxxxx>

Thanks,
Ian

> ---
>  tools/perf/builtin-mem.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c
> index 31144f586e77..f3dc2d2b879c 100644
> --- a/tools/perf/builtin-mem.c
> +++ b/tools/perf/builtin-mem.c
> @@ -78,6 +78,11 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
>         OPT_END()
>         };
>
> +       if (perf_mem_events__init()) {
> +               pr_err("failed: memory events not supported\n");
> +               return -1;
> +       }
> +
>         argc = parse_options(argc, argv, options, record_mem_usage,
>                              PARSE_OPT_KEEP_UNKNOWN);
>
> @@ -436,11 +441,6 @@ int cmd_mem(int argc, const char **argv)
>                 NULL
>         };
>
> -       if (perf_mem_events__init()) {
> -               pr_err("failed: memory events not supported\n");
> -               return -1;
> -       }
> -
>         argc = parse_options_subcommand(argc, argv, mem_options, mem_subcommands,
>                                         mem_usage, PARSE_OPT_KEEP_UNKNOWN);
>
> --
> 2.17.1
>