// SPDX-License-Identifier: GPL-2.0
#include <linux/list.h>
+#include <linux/list_sort.h>
+#include <linux/string.h>
#include <linux/zalloc.h>
#include <subcmd/pager.h>
#include <sys/types.h>
+#include <ctype.h>
#include <dirent.h>
#include <pthread.h>
#include <string.h>
static bool read_sysfs_core_pmus;
static bool read_sysfs_all_pmus;
+static int pmu_name_len_no_suffix(const char *str, unsigned long *num)
+{
+ int orig_len, len;
+
+ orig_len = len = strlen(str);
+
+ /* Non-uncore PMUs have their full length, for example, i915. */
+ if (!strstarts(str, "uncore_"))
+ return len;
+
+ /*
+ * Count trailing digits and '_', if '_{num}' suffix isn't present use
+ * the full length.
+ */
+ while (len > 0 && isdigit(str[len - 1]))
+ len--;
+
+ if (len > 0 && len != orig_len && str[len - 1] == '_') {
+ if (num)
+ *num = strtoul(&str[len], NULL, 10);
+ return len - 1;
+ }
+ return orig_len;
+}
+
void perf_pmus__destroy(void)
{
struct perf_pmu *pmu, *tmp;
return perf_pmu__lookup(core_pmu ? &core_pmus : &other_pmus, dirfd, name);
}
+static int pmus_cmp(void *priv __maybe_unused,
+ const struct list_head *lhs, const struct list_head *rhs)
+{
+ unsigned long lhs_num = 0, rhs_num = 0;
+ struct perf_pmu *lhs_pmu = container_of(lhs, struct perf_pmu, list);
+ struct perf_pmu *rhs_pmu = container_of(rhs, struct perf_pmu, list);
+ const char *lhs_pmu_name = lhs_pmu->name ?: "";
+ const char *rhs_pmu_name = rhs_pmu->name ?: "";
+ int lhs_pmu_name_len = pmu_name_len_no_suffix(lhs_pmu_name, &lhs_num);
+ int rhs_pmu_name_len = pmu_name_len_no_suffix(rhs_pmu_name, &rhs_num);
+ int ret = strncmp(lhs_pmu_name, rhs_pmu_name,
+ lhs_pmu_name_len < rhs_pmu_name_len ? lhs_pmu_name_len : rhs_pmu_name_len);
+
+ if (lhs_pmu_name_len != rhs_pmu_name_len || ret != 0 || lhs_pmu_name_len == 0)
+ return ret;
+
+ return lhs_num < rhs_num ? -1 : (lhs_num > rhs_num ? 1 : 0);
+}
+
/* Add all pmus in sysfs to pmu list: */
static void pmu_read_sysfs(bool core_only)
{
if (!perf_pmu__create_placeholder_core_pmu(&core_pmus))
pr_err("Failure to set up any core PMUs\n");
}
+ list_sort(NULL, &core_pmus, pmus_cmp);
+ list_sort(NULL, &other_pmus, pmus_cmp);
if (!list_empty(&core_pmus)) {
read_sysfs_core_pmus = true;
if (!core_only)