linux-kernel - Re: [PATCH 3/5] perf tools: Copy metric events properly when expand cgroups

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Date:   Fri, 25 Sep 2020 15:26:36 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Stephane Eranian <eranian@...gle.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Ian Rogers <irogers@...gle.com>,
        John Garry <john.garry@...wei.com>,
        Kajol Jain <kjain@...ux.ibm.com>,
        kernel test robot <rong.a.chen@...el.com>
Subject: Re: [PATCH 3/5] perf tools: Copy metric events properly when expand
 cgroups

On Thu, Sep 24, 2020 at 09:44:53PM +0900, Namhyung Kim wrote:

SNIP

>  
> +	if (metric_events) {
> +		orig_metric_events = *metric_events;
> +		rblist__init(metric_events);
> +	} else {
> +		rblist__init(&orig_metric_events);
> +	}
> +
>  	for (;;) {
>  		p = strchr(str, ',');
>  		e = p ? p : eos;
> @@ -255,6 +267,14 @@ int evlist__expand_cgroup(struct evlist *evlist, const char *str)
>  		cgroup__put(cgrp);
>  		nr_cgroups++;
>  
> +		if (metric_events) {
> +			perf_stat__collect_metric_expr(tmp_list);
> +			if (metricgroup__copy_metric_events(tmp_list, cgrp,
> +							    metric_events,
> +							    &orig_metric_events) < 0)
> +				break;
> +		}

looks good, do you plan to actualy add support for record?
my ack from last version stays

thanks,
jirka