Re: [PATCH 3/3] perf stat: Remove duplicate event counting

Thomas-Mich Richter
2018-06-15T08:56:27Z

On 06/15/2018 10:21 AM, Jiri Olsa wrote:
> On Thu, Jun 14, 2018 at 01:48:45PM +0200, Thomas Richter wrote:
>
> SNIP
>
>> +static void perf_pmu_assign_str(char *name, const char *field, char **old_str,
>> + char **new_str)
>> +{
>> + if (!*old_str)
>> + goto set_new;
>> +
>> + if (*new_str) { /* Have new string, check with old */
>> + if (strcasecmp(*old_str, *new_str))
>> + pr_debug("alias %s differs in field '%s'\n",
>> + name, field);
>> + zfree(old_str);
>> + } else /* Nothing new --> keep old string */
>> + return;
>> +set_new:
>> + *old_str = *new_str;
>> + *new_str = NULL;
>> +}
>> +
>> +static void perf_pmu_update_alias(struct perf_pmu_alias *old,
>> + struct perf_pmu_alias *newalias)
>> +{
>> + perf_pmu_assign_str(old->name, "desc", &old->desc, &newalias->desc);
>> + perf_pmu_assign_str(old->name, "long_desc", &old->long_desc,
>> + &newalias->long_desc);
>> + perf_pmu_assign_str(old->name, "topic", &old->topic, &newalias->topic);
>> + perf_pmu_assign_str(old->name, "metric_expr", &old->metric_expr,
>> + &newalias->metric_expr);
>> + perf_pmu_assign_str(old->name, "metric_name", &old->metric_name,
>> + &newalias->metric_name);
>> + perf_pmu_assign_str(old->name, "value", &old->str, &newalias->str);
>> + old->scale = newalias->scale;
>> + old->per_pkg = newalias->per_pkg;
>> + old->snapshot = newalias->snapshot;
>> + memcpy(old->unit, newalias->unit, sizeof(old->unit));
>> +}
>> +
>> +/* Delete an alias entry. */
>> +static void perf_pmu_free_alias(struct perf_pmu_alias *newalias)
>> +{
>> + zfree(&newalias->name);
>> + zfree(&newalias->desc);
>> + zfree(&newalias->long_desc);
>> + zfree(&newalias->topic);
>> + zfree(&newalias->str);
>> + zfree(&newalias->metric_expr);
>> + zfree(&newalias->metric_name);
>> + parse_events_terms__purge(&newalias->terms);
>> + free(newalias);
>> +}
>> +
>> +/* Merge an alias, search in alias list. If this name is already
>> + * present merge both of them to combine all information.
>> + */
>> +static bool perf_pmu_merge_alias(struct perf_pmu_alias *newalias,
>> + struct list_head *alist)
>> +{
>> + struct perf_pmu_alias *a;
>> +
>> + list_for_each_entry(a, alist, list) {
>> + if (!strcasecmp(newalias->name, a->name)) {
>> + perf_pmu_update_alias(a, newalias);
>> + perf_pmu_free_alias(newalias);
>> + return true;
>> + }
>> + }
>> + return false;
>> +}
>
> ok, I like your change better.. we can rebuilt it to use
> rb tree later when we have this fixed
>
> thanks,
> jirka
>

Thanks for the review. I will resend the patch set later today when I have added
Arnaldo's comments.
After that we add your rb tree stuff.

--
Thomas Richter, Dept 3303, IBM s390 Linux Development, Boeblingen, Germany
--
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