linux-kernel - Re: [PATCH 02/19] perf metric: Add expr__add

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Date:   Sun, 26 Jul 2020 14:46:47 +0530
From:   kajoljain <kjain@...ux.ibm.com>
To:     Jiri Olsa <jolsa@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Ian Rogers <irogers@...gle.com>,
        lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Michael Petlan <mpetlan@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        John Garry <john.garry@...wei.com>,
        "Paul A. Clarke" <pc@...ibm.com>,
        Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 02/19] perf metric: Add expr__add_id function



On 7/19/20 11:43 PM, Jiri Olsa wrote:
> Adding expr__add_id function to data for ID
> with zero value, which is used when scanning
> the expression for IDs.
> 

Reviewed-By : Kajol Jain<kjain@...ux.ibm.com>

Thanks,
Kajol Jain

> Acked-by: Ian Rogers <irogers@...gle.com>
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> ---
>  tools/perf/util/expr.c | 31 +++++++++++++++++++++++++------
>  tools/perf/util/expr.h |  1 +
>  tools/perf/util/expr.y |  2 +-
>  3 files changed, 27 insertions(+), 7 deletions(-)
> 
> diff --git a/tools/perf/util/expr.c b/tools/perf/util/expr.c
> index 578a173d4873..9228f60e2a20 100644
> --- a/tools/perf/util/expr.c
> +++ b/tools/perf/util/expr.c
> @@ -32,6 +32,26 @@ static bool key_equal(const void *key1, const void *key2,
>  	return !strcmp((const char *)key1, (const char *)key2);
>  }
>  
> +/* Caller must make sure id is allocated */
> +int expr__add_id(struct expr_parse_ctx *ctx, const char *id)
> +{
> +	struct expr_id_data *data_ptr = NULL, *old_data = NULL;
> +	char *old_key = NULL;
> +	int ret;
> +
> +	data_ptr = malloc(sizeof(*data_ptr));
> +	if (!data_ptr)
> +		return -ENOMEM;
> +
> +	ret = hashmap__set(&ctx->ids, id, data_ptr,
> +			   (const void **)&old_key, (void **)&old_data);
> +	if (ret)
> +		free(data_ptr);
> +	free(old_key);
> +	free(old_data);
> +	return ret;
> +}
> +
>  /* Caller must make sure id is allocated */
>  int expr__add_id_val(struct expr_parse_ctx *ctx, const char *id, double val)
>  {
> @@ -39,12 +59,11 @@ int expr__add_id_val(struct expr_parse_ctx *ctx, const char *id, double val)
>  	char *old_key = NULL;
>  	int ret;
>  
> -	if (val != 0.0) {
> -		data_ptr = malloc(sizeof(*data_ptr));
> -		if (!data_ptr)
> -			return -ENOMEM;
> -		data_ptr->val = val;
> -	}
> +	data_ptr = malloc(sizeof(*data_ptr));
> +	if (!data_ptr)
> +		return -ENOMEM;
> +	data_ptr->val = val;
> +
>  	ret = hashmap__set(&ctx->ids, id, data_ptr,
>  			   (const void **)&old_key, (void **)&old_data);
>  	if (ret)
> diff --git a/tools/perf/util/expr.h b/tools/perf/util/expr.h
> index 21fe5bd85718..ac32cda42006 100644
> --- a/tools/perf/util/expr.h
> +++ b/tools/perf/util/expr.h
> @@ -26,6 +26,7 @@ struct expr_scanner_ctx {
>  
>  void expr__ctx_init(struct expr_parse_ctx *ctx);
>  void expr__ctx_clear(struct expr_parse_ctx *ctx);
> +int expr__add_id(struct expr_parse_ctx *ctx, const char *id);
>  int expr__add_id_val(struct expr_parse_ctx *ctx, const char *id, double val);
>  int expr__get_id(struct expr_parse_ctx *ctx, const char *id, double *val_ptr);
>  int expr__parse(double *final_val, struct expr_parse_ctx *ctx,
> diff --git a/tools/perf/util/expr.y b/tools/perf/util/expr.y
> index b2b3420ea6ec..8befe4a46f87 100644
> --- a/tools/perf/util/expr.y
> +++ b/tools/perf/util/expr.y
> @@ -69,7 +69,7 @@ all_other: all_other other
>  
>  other: ID
>  {
> -	expr__add_id_val(ctx, $1, 0.0);
> +	expr__add_id(ctx, $1);
>  }
>  |
>  MIN | MAX | IF | ELSE | SMT_ON | NUMBER | '|' | '^' | '&' | '-' | '+' | '*' | '/' | '%' | '(' | ')' | ','
>