On Tue, Sep 02, 2014 at 11:29:29AM -0400, kan.li...@intel.com wrote:
> From: Kan Liang <kan.li...@intel.com>
SNIP
> + * Read the pmu events list from sysfs
> + * Save it into kernel_pmu_events_list
> + */
> +static void scan_kernel_pmu_events_list(void)
> +{
> +
> + struct perf_pmu *pmu = NULL;
> + struct perf_pmu_alias *alias;
> + int len = 0;
> +
> + while ((pmu = perf_pmu__scan(pmu)) != NULL)
> + list_for_each_entry(alias, &pmu->aliases, list) {
Why do we need to call scan here? Looks like:
pmu = pmu_lookup("cpu")
should be enough.. and could be used below as well
> + if (!strcmp(pmu->name, "cpu")) {
> + if (strchr(alias->name, '-'))
> + len++;
> + len++;
> + }
> + }
> + if (len == 0)
> + return;
> + kernel_pmu_events_list =
> + malloc(sizeof(struct kernel_pmu_event_symbol) * len);
> + kernel_pmu_events_list_num = len;
> +
> + pmu = NULL;
> + len = 0;
> + while ((pmu = perf_pmu__scan(pmu)) != NULL)
> + list_for_each_entry(alias, &pmu->aliases, list) {
> + if (!strcmp(pmu->name, "cpu")) {
> + struct kernel_pmu_event_symbol *p =
> + kernel_pmu_events_list + len;
> + char *tmp = strchr(alias->name, '-');
> +
> + if (tmp != NULL) {
> + strlcpy(p->symbol, alias->name,
> + tmp - alias->name + 1);
> + p->type = KERNEL_PMU_EVENT_PREFIX;
> + tmp++;
> + p++;
> + strcpy(p->symbol, tmp);
> + p->type = KERNEL_PMU_EVENT_SUFFIX;
> + len += 2;
> + } else {
> + strcpy(p->symbol, alias->name);
> + p->type = KERNEL_PMU_EVENT;
> + len++;
> + }
> + }
> + }
> + qsort(kernel_pmu_events_list, len,
> + sizeof(struct kernel_pmu_event_symbol), comp_pmu);
> +
> +}
SNIP
thanks,
jirka
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