linux-kernel - Re: [PATCH v1 1/2] perf, tools: Move perf_evsel__reset_weak

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Date:   Tue, 2 Oct 2018 17:41:31 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Andi Kleen <andi@...stfloor.org>
Cc:     acme@...nel.org, jolsa@...nel.org, linux-kernel@...r.kernel.org,
        Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH v1 1/2] perf, tools: Move perf_evsel__reset_weak_group
 into evlist

On Mon, Oct 01, 2018 at 12:59:26PM -0700, Andi Kleen wrote:
> From: Andi Kleen <ak@...ux.intel.com>
> 
> - Move the function from builtin-stat to evlist for reuse
> - Rename to evlist to match purpose better
> - Pass the evlist as first argument.
> - No functional changes
> 
> Signed-off-by: Andi Kleen <ak@...ux.intel.com>

Acked-by: Jiri Olsa <jolsa@...nel.org>

thanks,
jirka

> ---
>  tools/perf/builtin-stat.c | 29 ++---------------------------
>  tools/perf/util/evlist.c  | 27 +++++++++++++++++++++++++++
>  tools/perf/util/evlist.h  |  3 +++
>  3 files changed, 32 insertions(+), 27 deletions(-)
> 
> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> index 08a1e64078ca..e60f6991dbb8 100644
> --- a/tools/perf/builtin-stat.c
> +++ b/tools/perf/builtin-stat.c
> @@ -567,32 +567,6 @@ static bool perf_evsel__should_store_id(struct perf_evsel *counter)
>  	return STAT_RECORD || counter->attr.read_format & PERF_FORMAT_ID;
>  }
>  
> -static struct perf_evsel *perf_evsel__reset_weak_group(struct perf_evsel *evsel)
> -{
> -	struct perf_evsel *c2, *leader;
> -	bool is_open = true;
> -
> -	leader = evsel->leader;
> -	pr_debug("Weak group for %s/%d failed\n",
> -			leader->name, leader->nr_members);
> -
> -	/*
> -	 * for_each_group_member doesn't work here because it doesn't
> -	 * include the first entry.
> -	 */
> -	evlist__for_each_entry(evsel_list, c2) {
> -		if (c2 == evsel)
> -			is_open = false;
> -		if (c2->leader == leader) {
> -			if (is_open)
> -				perf_evsel__close(c2);
> -			c2->leader = c2;
> -			c2->nr_members = 0;
> -		}
> -	}
> -	return leader;
> -}
> -
>  static int __run_perf_stat(int argc, const char **argv, int run_idx)
>  {
>  	int interval = stat_config.interval;
> @@ -639,7 +613,8 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx)
>  			if ((errno == EINVAL || errno == EBADF) &&
>  			    counter->leader != counter &&
>  			    counter->weak_group) {
> -				counter = perf_evsel__reset_weak_group(counter);
> +				counter = perf_evlist__reset_weak_group(evsel_list,
> +									counter);
>  				goto try_again;
>  			}
>  
> diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
> index e7a4b31a84fb..de90f9097e97 100644
> --- a/tools/perf/util/evlist.c
> +++ b/tools/perf/util/evlist.c
> @@ -1810,3 +1810,30 @@ void perf_evlist__force_leader(struct perf_evlist *evlist)
>  		leader->forced_leader = true;
>  	}
>  }
> +
> +struct perf_evsel *perf_evlist__reset_weak_group(struct perf_evlist *evsel_list,
> +						 struct perf_evsel *evsel)
> +{
> +	struct perf_evsel *c2, *leader;
> +	bool is_open = true;
> +
> +	leader = evsel->leader;
> +	pr_debug("Weak group for %s/%d failed\n",
> +			leader->name, leader->nr_members);
> +
> +	/*
> +	 * for_each_group_member doesn't work here because it doesn't
> +	 * include the first entry.
> +	 */
> +	evlist__for_each_entry(evsel_list, c2) {
> +		if (c2 == evsel)
> +			is_open = false;
> +		if (c2->leader == leader) {
> +			if (is_open)
> +				perf_evsel__close(c2);
> +			c2->leader = c2;
> +			c2->nr_members = 0;
> +		}
> +	}
> +	return leader;
> +}
> diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
> index dc66436add98..9919eed6d15b 100644
> --- a/tools/perf/util/evlist.h
> +++ b/tools/perf/util/evlist.h
> @@ -312,4 +312,7 @@ bool perf_evlist__exclude_kernel(struct perf_evlist *evlist);
>  
>  void perf_evlist__force_leader(struct perf_evlist *evlist);
>  
> +struct perf_evsel *perf_evlist__reset_weak_group(struct perf_evlist *evlist,
> +						 struct perf_evsel *evsel);
> +
>  #endif /* __PERF_EVLIST_H */
> -- 
> 2.17.1
>