linux-kernel - Re: [PATCH] perf record: Let user have timestamps with per-thread recording

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Date:	Mon, 06 Jul 2015 09:31:13 -0600
From:	David Ahern <dsahern@...il.com>
To:	Adrian Hunter <adrian.hunter@...el.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>
CC:	linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>
Subject: Re: [PATCH] perf record: Let user have timestamps with per-thread
 recording

On 7/6/15 5:51 AM, Adrian Hunter wrote:
> diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
> index 6be3c01ff6f8..ec98e5b4e14e 100644
> --- a/tools/perf/util/evsel.c
> +++ b/tools/perf/util/evsel.c
> @@ -707,7 +707,8 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
>   	 */
>   	if (opts->sample_time &&
>   	    (!perf_missing_features.sample_id_all &&
> -	    (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu)))
> +	    (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu ||
> +	     opts->sample_time_set)))
>   		perf_evsel__set_sample_bit(evsel, TIME);
>
>   	if (opts->raw_samples && !evsel->no_aux_samples) {
>

Why is the sample_time_set even needed? If a user or a command asks for 
sample time the bit should be set. This seems crazy that underlying code 
is ignoring the request.
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