Re: [PATCH v5 08/11] perf/tools: Refactoring metricgroup__add_metric function

kajoljain
2020-03-18T12:17:59Z

On 3/17/20 8:40 PM, Jiri Olsa wrote:
> On Tue, Mar 17, 2020 at 11:53:30AM +0530, Kajol Jain wrote:
>> This patch refactor metricgroup__add_metric function where
>> some part of it move to function metricgroup__add_metric_param.
>> No logic change.
>>
>> Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
>> ---
>> tools/perf/util/metricgroup.c | 63 +++++++++++++++++++++--------------
>> 1 file changed, 38 insertions(+), 25 deletions(-)
>>
>> diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
>> index c3a8c701609a..b4919bcfbd8b 100644
>> --- a/tools/perf/util/metricgroup.c
>> +++ b/tools/perf/util/metricgroup.c
>> @@ -474,6 +474,41 @@ static bool metricgroup__has_constraint(struct pmu_event *pe)
>> return false;
>> }
>>
>> +static int metricgroup__add_metric_param(struct strbuf *events,
>> + struct list_head *group_list, struct pmu_event *pe)
>> +{
>> +
>> + const char **ids;
>> + int idnum;
>> + struct egroup *eg;
>> + int ret = -EINVAL;
>> +
>> + if (expr__find_other(pe->metric_expr, NULL, &ids, &idnum, 1) < 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;
>
> ??? you need to return in here, eg is NULL

Yes right, miss this part. Will correct it.

>
>> +
>> + eg->ids = ids;
>> + eg->idnum = idnum;
>> + eg->metric_name = pe->metric_name;
>> + eg->metric_expr = pe->metric_expr;
>> + eg->metric_unit = pe->unit;
>> + list_add_tail(&eg->nd, group_list);
>> + ret = 0;
>> +
>> + return ret;
>> +}
>> +
>> static int metricgroup__add_metric(const char *metric, struct strbuf *events,
>> struct list_head *group_list)
>> {
>> @@ -493,35 +528,13 @@ static int metricgroup__add_metric(const char *metric, struct strbuf *events,
>> continue;
>> if (match_metric(pe->metric_group, metric) ||
>> match_metric(pe->metric_name, metric)) {
>> - const char **ids;
>> - int idnum;
>> - struct egroup *eg;
>>
>> pr_debug("metric expr %s for %s\n", pe->metric_expr, pe->metric_name);
>>
>> - if (expr__find_other(pe->metric_expr,
>> - NULL, &ids, &idnum) < 0)
>> + ret = metricgroup__add_metric_param(events,
>> + group_list, pe);
>> + if (ret == -EINVAL)
>> continue;
>
> previous code did 'continue' on ret < 0, why just -EINVAL now?

Actually incase we have memory issue then we are not
continuing that's why I added check for -EINVAL explicitly. Because for other cases
I am returning -EINVAL itself. But Yes I miss one part, where
even after matched metric we are continuing incase ret = 0. Will update that part.
Please let me know if it sounds fine.

Thanks,
Kajol
>
> jirka
>