linux-kernel - Re: [PATCH 03/35] perf ordered_events: Add ordered_events__last_flush

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Date:   Tue, 19 Jul 2022 09:56:45 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     Adrian Hunter <adrian.hunter@...el.com>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Andi Kleen <ak@...ux.intel.com>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Subject: Re: [PATCH 03/35] perf ordered_events: Add ordered_events__last_flush_time()

On Mon, Jul 11, 2022 at 2:32 AM Adrian Hunter <adrian.hunter@...el.com> wrote:
>
> Allow callers to get the ordered_events last flush timestamp.
>
> This is needed in perf inject to obey finished-round ordering when
> injecting additional events (e.g. from a guest perf.data file) with
> timestamps. Any additional events that have timestamps before the last
> flush time must be injected before the corresponding FINISHED_ROUND event.
>
> Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>

Acked-by: Ian Rogers <irogers@...gle.com>

Thanks,
Ian

> ---
>  tools/perf/util/ordered-events.h | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/tools/perf/util/ordered-events.h b/tools/perf/util/ordered-events.h
> index 0b05c3c0aeaa..8febbd7c98ca 100644
> --- a/tools/perf/util/ordered-events.h
> +++ b/tools/perf/util/ordered-events.h
> @@ -75,4 +75,10 @@ void ordered_events__set_copy_on_queue(struct ordered_events *oe, bool copy)
>  {
>         oe->copy_on_queue = copy;
>  }
> +
> +static inline u64 ordered_events__last_flush_time(struct ordered_events *oe)
> +{
> +       return oe->last_flush;
> +}
> +
>  #endif /* __ORDERED_EVENTS_H */
> --
> 2.25.1
>