* Stephane Eranian <[email protected]> wrote:
> When perf stat -p pid is used, the events must be enabled
> immediately as there is no exec and thus no enable_on_exec.
>
> Signed-off-by: Stephane Eranian <[email protected]>
>
> --
> builtin-stat.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> index 95db31c..3a91fad 100644
> --- a/tools/perf/builtin-stat.c
> +++ b/tools/perf/builtin-stat.c
> @@ -159,8 +159,10 @@ static void create_perf_stat_counter(int counter, int
> pid)
> }
> } else {
> attr->inherit = inherit;
> - attr->disabled = 1;
> - attr->enable_on_exec = 1;
> + if (target_pid == -1) {
> + attr->disabled = 1;
> + attr->enable_on_exec = 1;
> + }
Mind checking latest -tip, which has these commits:
d6d901c: perf events: Change perf parameter --pid to process-wide collection
instead of thread-wid
46be604: perf record: Enable counters only when kernel is execing subcommand
6be2850: perf stat: Enable counters when collecting process-wide or system-wide
data
as they fix/improve various --pid related behavioral aspects of perf. Does it
work fine for you now?
Ingo
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