linux-kernel - Re: [PATCH v1 4/9] perf util: Update and print per-thread shadow stats

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Date:   Wed, 22 Nov 2017 09:37:21 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     "Jin, Yao" <yao.jin@...ux.intel.com>
Cc:     acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com,
        Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH v1 4/9] perf util: Update and print per-thread shadow
 stats

On Wed, Nov 22, 2017 at 11:10:37AM +0800, Jin, Yao wrote:
> 
> 
> On 11/21/2017 11:18 PM, Jiri Olsa wrote:
> > On Mon, Nov 20, 2017 at 10:43:39PM +0800, Jin Yao wrote:
> > 
> > SNIP
> > 
> > >   	if (num == 0)
> > > diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
> > > index 151e9ef..50bb16d 100644
> > > --- a/tools/perf/util/stat.c
> > > +++ b/tools/perf/util/stat.c
> > > @@ -278,9 +278,16 @@ process_counter_values(struct perf_stat_config *config, struct perf_evsel *evsel
> > >   			perf_evsel__compute_deltas(evsel, cpu, thread, count);
> > >   		perf_counts_values__scale(count, config->scale, NULL);
> > >   		if (config->aggr_mode == AGGR_NONE)
> > > -			perf_stat__update_shadow_stats(evsel, count->val, cpu);
> > > -		if (config->aggr_mode == AGGR_THREAD)
> > > -			perf_stat__update_shadow_stats(evsel, count->val, 0);
> > > +			perf_stat__update_shadow_stats(evsel, count->val, cpu,
> > > +						       NULL);
> > > +		if (config->aggr_mode == AGGR_THREAD) {
> > > +			if (config->stats)
> > > +				perf_stat__update_shadow_stats(evsel,
> > > +					count->val, 0, &config->stats[thread]);
> > 
> > please add this part together with config->stats allocation/usage
> > and keep this change only about adding the struct runtime_stat *stat
> > into the code path with no functional change
> > 
> > thanks,
> > jirka
> > 
> 
> The interface of perf_stat__update_shadow_stats() is changed (added with a
> new parameter 'struct runtime_stat *stat').
> 
> If I move above part to another patch (e.g. move to
> v1-0006-perf-stat-Allocate-shadow-stats-buffer-for-thread.patch), the
> compilation would be failed if only applying with this patch. It's not good
> for git bisect.

but you could make the patch just to add the 'struct runtime_stat *stat'
as an argument through the code path..  as a base for the stats, no?

jirka