linux-kernel - Re: [PATCH 1/2] perf script: Fix --reltime with --time

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Date:   Mon, 14 Oct 2019 11:07:07 -0300
From:   Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To:     Andi Kleen <andi@...stfloor.org>
Cc:     jolsa@...nel.org, linux-kernel@...r.kernel.org,
        Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 1/2] perf script: Fix --reltime with --time

Em Fri, Oct 11, 2019 at 11:21:39AM -0700, Andi Kleen escreveu:
> From: Andi Kleen <ak@...ux.intel.com>
> 
> My earlier patch to just enable --reltime with --time was a little too optimistic.
> The --time parsing would accept absolute time, which is very confusing to the user.
> 
> Support relative time in --time parsing too. This only works with recent perf
> record that records the first sample time. Otherwise we error out.

Thanks, applied both patches.

- Arnaldo
 
> Fixes: 3714437d3fcc ("perf script: Allow --time with --reltime")
> Signed-off-by: Andi Kleen <ak@...ux.intel.com>
> ---
>  tools/perf/builtin-script.c  |  5 +++--
>  tools/perf/util/time-utils.c | 27 ++++++++++++++++++++++++---
>  tools/perf/util/time-utils.h |  5 +++++
>  3 files changed, 32 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
> index 1c797a948ada..f86c5cce5b2c 100644
> --- a/tools/perf/builtin-script.c
> +++ b/tools/perf/builtin-script.c
> @@ -3864,10 +3864,11 @@ int cmd_script(int argc, const char **argv)
>  		goto out_delete;
>  
>  	if (script.time_str) {
> -		err = perf_time__parse_for_ranges(script.time_str, session,
> +		err = perf_time__parse_for_ranges_reltime(script.time_str, session,
>  						  &script.ptime_range,
>  						  &script.range_size,
> -						  &script.range_num);
> +						  &script.range_num,
> +						  reltime);
>  		if (err < 0)
>  			goto out_delete;
>  
> diff --git a/tools/perf/util/time-utils.c b/tools/perf/util/time-utils.c
> index 9796a2e43f67..302443921681 100644
> --- a/tools/perf/util/time-utils.c
> +++ b/tools/perf/util/time-utils.c
> @@ -458,10 +458,11 @@ bool perf_time__ranges_skip_sample(struct perf_time_interval *ptime_buf,
>  	return true;
>  }
>  
> -int perf_time__parse_for_ranges(const char *time_str,
> +int perf_time__parse_for_ranges_reltime(const char *time_str,
>  				struct perf_session *session,
>  				struct perf_time_interval **ranges,
> -				int *range_size, int *range_num)
> +				int *range_size, int *range_num,
> +				bool reltime)
>  {
>  	bool has_percent = strchr(time_str, '%');
>  	struct perf_time_interval *ptime_range;
> @@ -471,7 +472,7 @@ int perf_time__parse_for_ranges(const char *time_str,
>  	if (!ptime_range)
>  		return -ENOMEM;
>  
> -	if (has_percent) {
> +	if (has_percent || reltime) {
>  		if (session->evlist->first_sample_time == 0 &&
>  		    session->evlist->last_sample_time == 0) {
>  			pr_err("HINT: no first/last sample time found in perf data.\n"
> @@ -479,7 +480,9 @@ int perf_time__parse_for_ranges(const char *time_str,
>  			       "(if '--buildid-all' is enabled, please set '--timestamp-boundary').\n");
>  			goto error;
>  		}
> +	}
>  
> +	if (has_percent) {
>  		num = perf_time__percent_parse_str(
>  				ptime_range, size,
>  				time_str,
> @@ -492,6 +495,15 @@ int perf_time__parse_for_ranges(const char *time_str,
>  	if (num < 0)
>  		goto error_invalid;
>  
> +	if (reltime) {
> +		int i;
> +
> +		for (i = 0; i < num; i++) {
> +			ptime_range[i].start += session->evlist->first_sample_time;
> +			ptime_range[i].end += session->evlist->first_sample_time;
> +		}
> +	}
> +
>  	*range_size = size;
>  	*range_num = num;
>  	*ranges = ptime_range;
> @@ -504,6 +516,15 @@ int perf_time__parse_for_ranges(const char *time_str,
>  	return ret;
>  }
>  
> +int perf_time__parse_for_ranges(const char *time_str,
> +				struct perf_session *session,
> +				struct perf_time_interval **ranges,
> +				int *range_size, int *range_num)
> +{
> +	return perf_time__parse_for_ranges_reltime(time_str, session, ranges,
> +					range_size, range_num, false);
> +}
> +
>  int timestamp__scnprintf_usec(u64 timestamp, char *buf, size_t sz)
>  {
>  	u64  sec = timestamp / NSEC_PER_SEC;
> diff --git a/tools/perf/util/time-utils.h b/tools/perf/util/time-utils.h
> index 4f42988eb2f7..1142b0bddd5e 100644
> --- a/tools/perf/util/time-utils.h
> +++ b/tools/perf/util/time-utils.h
> @@ -26,6 +26,11 @@ bool perf_time__ranges_skip_sample(struct perf_time_interval *ptime_buf,
>  
>  struct perf_session;
>  
> +int perf_time__parse_for_ranges_reltime(const char *str, struct perf_session *session,
> +				struct perf_time_interval **ranges,
> +				int *range_size, int *range_num,
> +				bool reltime);
> +
>  int perf_time__parse_for_ranges(const char *str, struct perf_session *session,
>  				struct perf_time_interval **ranges,
>  				int *range_size, int *range_num);
> -- 
> 2.21.0

-- 

- Arnaldo