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Message-ID: <20180302233022.GB8970@krava>
Date: Sat, 3 Mar 2018 00:30:22 +0100
From: Jiri Olsa <jolsa@...hat.com>
To: kan.liang@...ux.intel.com
Cc: acme@...nel.org, mingo@...hat.com, linux-kernel@...r.kernel.org,
namhyung@...nel.org, wangnan0@...wei.com, ak@...ux.intel.com
Subject: Re: [PATCH 02/14] perf trace: Apply new perf_mmap__read_event()
interface
On Thu, Mar 01, 2018 at 06:08:59PM -0500, kan.liang@...ux.intel.com wrote:
> From: Kan Liang <kan.liang@...ux.intel.com>
>
> The perf trace still use the legacy interface.
>
> Apply the new perf_mmap__read_event() interface for perf trace.
>
> No functional change.
>
> Signed-off-by: Kan Liang <kan.liang@...ux.intel.com>
> ---
> tools/perf/builtin-trace.c | 11 +++++++++--
> 1 file changed, 9 insertions(+), 2 deletions(-)
>
> diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
> index e7f1b18..a46644f 100644
> --- a/tools/perf/builtin-trace.c
> +++ b/tools/perf/builtin-trace.c
> @@ -2472,8 +2472,14 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
>
> for (i = 0; i < evlist->nr_mmaps; i++) {
> union perf_event *event;
> + struct perf_mmap *md;
> + u64 end, start;
>
> - while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
> + md = &evlist->mmap[i];
> + if (perf_mmap__read_init(md, 0, &start, &end) < 0)
> + continue;
> +
> + while ((event = perf_mmap__read_event(md, 0, &start, end)) != NULL) {
> struct perf_sample sample;
>
> ++trace->nr_events;
> @@ -2486,7 +2492,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
>
> trace__handle_event(trace, event, &sample);
> next_event:
> - perf_evlist__mmap_consume(evlist, i);
> + perf_mmap__consume(md, 0);
could you call this with 'false' instead of 0, it's 'bool overwrite'
applies also to the rest of the patchset
thanks,
jirka
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