linux-kernel - Re: [PATCH v2] perf stat: Add missing newline in pr

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Date:   Mon, 12 Jun 2023 09:31:10 +0100
From:   James Clark <james.clark@....com>
To:     Yang Jihong <yangjihong1@...wei.com>
Cc:     peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
        mark.rutland@....com, alexander.shishkin@...ux.intel.com,
        jolsa@...nel.org, namhyung@...nel.org, irogers@...gle.com,
        adrian.hunter@...el.com, linux-perf-users@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] perf stat: Add missing newline in pr_err messages



On 10/06/2023 10:44, Yang Jihong wrote:
> The newline is missing for error messages in add_default_attributes()
> 
> Before:
> 
>   # perf stat --topdown
>   Topdown requested but the topdown metric groups aren't present.
>   (See perf list the metric groups have names like TopdownL1)#
> 
> After:
> 
>   # perf stat --topdown
>   Topdown requested but the topdown metric groups aren't present.
>   (See perf list the metric groups have names like TopdownL1)
>   #
> 
> In addition, perf_stat_init_aggr_mode() and perf_stat_init_aggr_mode_file()
> have the same problem, fixed by the way.
> 
> Signed-off-by: Yang Jihong <yangjihong1@...wei.com>

Reviewed-by: James Clark <james.clark@....com>

> ---
> 
> Changes since v1:
>  - Correct commit title to `pr_err`
> 
>  tools/perf/builtin-stat.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> index b9ad32f21e57..78644ae538c4 100644
> --- a/tools/perf/builtin-stat.c
> +++ b/tools/perf/builtin-stat.c
> @@ -1398,7 +1398,7 @@ static int perf_stat_init_aggr_mode(void)
>  		stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.user_requested_cpus,
>  							 get_id, /*data=*/NULL, needs_sort);
>  		if (!stat_config.aggr_map) {
> -			pr_err("cannot build %s map", aggr_mode__string[stat_config.aggr_mode]);
> +			pr_err("cannot build %s map\n", aggr_mode__string[stat_config.aggr_mode]);
>  			return -1;
>  		}
>  		stat_config.aggr_get_id = aggr_mode__get_id(stat_config.aggr_mode);
> @@ -1650,7 +1650,7 @@ static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
>  	stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.user_requested_cpus,
>  						 get_id, env, needs_sort);
>  	if (!stat_config.aggr_map) {
> -		pr_err("cannot build %s map", aggr_mode__string[stat_config.aggr_mode]);
> +		pr_err("cannot build %s map\n", aggr_mode__string[stat_config.aggr_mode]);
>  		return -1;
>  	}
>  	stat_config.aggr_get_id = aggr_mode__get_id_file(stat_config.aggr_mode);
> @@ -1789,7 +1789,7 @@ static int add_default_attributes(void)
>  		 * on an architecture test for such a metric name.
>  		 */
>  		if (!metricgroup__has_metric("transaction")) {
> -			pr_err("Missing transaction metrics");
> +			pr_err("Missing transaction metrics\n");
>  			return -1;
>  		}
>  		return metricgroup__parse_groups(evsel_list, "transaction",
> @@ -1805,7 +1805,7 @@ static int add_default_attributes(void)
>  		int smi;
>  
>  		if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
> -			pr_err("freeze_on_smi is not supported.");
> +			pr_err("freeze_on_smi is not supported.\n");
>  			return -1;
>  		}
>  
> @@ -1818,7 +1818,7 @@ static int add_default_attributes(void)
>  		}
>  
>  		if (!metricgroup__has_metric("smi")) {
> -			pr_err("Missing smi metrics");
> +			pr_err("Missing smi metrics\n");
>  			return -1;
>  		}
>  
> @@ -1843,7 +1843,7 @@ static int add_default_attributes(void)
>  
>  		if (!max_level) {
>  			pr_err("Topdown requested but the topdown metric groups aren't present.\n"
> -				"(See perf list the metric groups have names like TopdownL1)");
> +				"(See perf list the metric groups have names like TopdownL1)\n");
>  			return -1;
>  		}
>  		if (stat_config.topdown_level > max_level) {