linux-kernel - Re: [PATCH v5 09/11] perf/tools: Enhance JSON/metric infrastructure to handle "?"

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Date:   Tue, 17 Mar 2020 16:10:47 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Kajol Jain <kjain@...ux.ibm.com>
Cc:     acme@...nel.org, linuxppc-dev@...ts.ozlabs.org, mpe@...erman.id.au,
        sukadev@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org, anju@...ux.vnet.ibm.com,
        maddy@...ux.vnet.ibm.com, ravi.bangoria@...ux.ibm.com,
        peterz@...radead.org, yao.jin@...ux.intel.com, ak@...ux.intel.com,
        jolsa@...nel.org, kan.liang@...ux.intel.com, jmario@...hat.com,
        alexander.shishkin@...ux.intel.com, mingo@...nel.org,
        paulus@...abs.org, namhyung@...nel.org, mpetlan@...hat.com,
        gregkh@...uxfoundation.org, benh@...nel.crashing.org,
        mamatha4@...ux.vnet.ibm.com, mark.rutland@....com,
        tglx@...utronix.de
Subject: Re: [PATCH v5 09/11] perf/tools: Enhance JSON/metric infrastructure
 to handle "?"

On Tue, Mar 17, 2020 at 11:53:31AM +0530, Kajol Jain wrote:

SBIP

> +static int metricgroup__add_metric_runtime_param(struct strbuf *events,
> +			struct list_head *group_list, struct pmu_event *pe)
> +{
> +	int i, count;
> +	int ret = -EINVAL;
> +
> +	count = arch_get_runtimeparam();
> +
> +	/* This loop is added to create multiple
> +	 * events depend on count value and add
> +	 * those events to group_list.
> +	 */
> +
> +	for (i = 0; i < count; i++) {
> +		const char **ids;
> +		int idnum;
> +		struct egroup *eg;
> +		char value[PATH_MAX];
> +
> +		if (expr__find_other(pe->metric_expr, NULL, &ids, &idnum, i) < 0)
> +			return ret;
> +
> +		if (events->len > 0)
> +			strbuf_addf(events, ",");
> +
> +		if (metricgroup__has_constraint(pe))
> +			metricgroup__add_metric_non_group(events, ids, idnum);
> +		else
> +			metricgroup__add_metric_weak_group(events, ids, idnum);
> +
> +		eg = malloc(sizeof(*eg));
> +		if (!eg) {
> +			ret = -ENOMEM;
> +			return ret;
> +		}
> +
> +		sprintf(value, "%s%c%d", pe->metric_name, '_', i);
> +		eg->ids = ids;
> +		eg->idnum = idnum;
> +		eg->metric_name = strdup(value);
> +		if (!eg->metric_name) {
> +			ret = -ENOMEM;
> +			return ret;
> +		}
> +
> +		eg->metric_expr = pe->metric_expr;
> +		eg->metric_unit = pe->unit;
> +		list_add_tail(&eg->nd, group_list);
> +		ret = 0;
> +
> +		if (ret != 0)
> +			break;

again, this is part of metricgroup__add_metric_param no? why not use it?

jirka