^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Basic resctrl file system operations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2018 Intel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Authors:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Fenghua Yu <fenghua.yu@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include "resctrl.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) int tests_run;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) static int find_resctrl_mount(char *buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) FILE *mounts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) char line[256], *fs, *mntpoint;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) mounts = fopen("/proc/mounts", "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) if (!mounts) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) perror("/proc/mounts");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) while (!feof(mounts)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) if (!fgets(line, 256, mounts))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) fs = strtok(line, " \t");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) if (!fs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) mntpoint = strtok(NULL, " \t");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) if (!mntpoint)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) fs = strtok(NULL, " \t");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) if (!fs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) if (strcmp(fs, "resctrl"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) fclose(mounts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) if (buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) strncpy(buffer, mntpoint, 256);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) fclose(mounts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * remount_resctrlfs - Remount resctrl FS at /sys/fs/resctrl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * @mum_resctrlfs: Should the resctrl FS be remounted?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * If not mounted, mount it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * If mounted and mum_resctrlfs then remount resctrl FS.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * If mounted and !mum_resctrlfs then noop
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * Return: 0 on success, non-zero on failure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) int remount_resctrlfs(bool mum_resctrlfs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) char mountpoint[256];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) ret = find_resctrl_mount(mountpoint);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) strcpy(mountpoint, RESCTRL_PATH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (!ret && mum_resctrlfs && umount(mountpoint)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) printf("not ok unmounting \"%s\"\n", mountpoint);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) perror("# umount");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) tests_run++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (!ret && !mum_resctrlfs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) ret = mount("resctrl", RESCTRL_PATH, "resctrl", 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) printf("%sok mounting resctrl to \"%s\"\n", ret ? "not " : "",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) RESCTRL_PATH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) perror("# mount");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) tests_run++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) int umount_resctrlfs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if (umount(RESCTRL_PATH)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) perror("# Unable to umount resctrl");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * get_resource_id - Get socket number/l3 id for a specified CPU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) * @cpu_no: CPU number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * @resource_id: Socket number or l3_id
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * Return: >= 0 on success, < 0 on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) int get_resource_id(int cpu_no, int *resource_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) char phys_pkg_path[1024];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) FILE *fp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (is_amd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) sprintf(phys_pkg_path, "%s%d/cache/index3/id",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) PHYS_ID_PATH, cpu_no);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) sprintf(phys_pkg_path, "%s%d/topology/physical_package_id",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) PHYS_ID_PATH, cpu_no);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) fp = fopen(phys_pkg_path, "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (!fp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) perror("Failed to open physical_package_id");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) if (fscanf(fp, "%d", resource_id) <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) perror("Could not get socket number or l3 id");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) fclose(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) fclose(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) * get_cache_size - Get cache size for a specified CPU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) * @cpu_no: CPU number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) * @cache_type: Cache level L2/L3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) * @cache_size: pointer to cache_size
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) * Return: = 0 on success, < 0 on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) int get_cache_size(int cpu_no, char *cache_type, unsigned long *cache_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) char cache_path[1024], cache_str[64];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) int length, i, cache_num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) FILE *fp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) if (!strcmp(cache_type, "L3")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) cache_num = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) } else if (!strcmp(cache_type, "L2")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) cache_num = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) perror("Invalid cache level");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) sprintf(cache_path, "/sys/bus/cpu/devices/cpu%d/cache/index%d/size",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) cpu_no, cache_num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) fp = fopen(cache_path, "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) if (!fp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) perror("Failed to open cache size");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (fscanf(fp, "%s", cache_str) <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) perror("Could not get cache_size");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) fclose(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) fclose(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) length = (int)strlen(cache_str);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) *cache_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) for (i = 0; i < length; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) if ((cache_str[i] >= '0') && (cache_str[i] <= '9'))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) *cache_size = *cache_size * 10 + (cache_str[i] - '0');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) else if (cache_str[i] == 'K')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) *cache_size = *cache_size * 1024;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) else if (cache_str[i] == 'M')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) *cache_size = *cache_size * 1024 * 1024;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) #define CORE_SIBLINGS_PATH "/sys/bus/cpu/devices/cpu"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) * get_cbm_mask - Get cbm mask for given cache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) * @cache_type: Cache level L2/L3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) * @cbm_mask: cbm_mask returned as a string
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) * Return: = 0 on success, < 0 on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) int get_cbm_mask(char *cache_type, char *cbm_mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) char cbm_mask_path[1024];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) FILE *fp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) if (!cbm_mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) sprintf(cbm_mask_path, "%s/%s/cbm_mask", CBM_MASK_PATH, cache_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) fp = fopen(cbm_mask_path, "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) if (!fp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) perror("Failed to open cache level");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) if (fscanf(fp, "%s", cbm_mask) <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) perror("Could not get max cbm_mask");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) fclose(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) fclose(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) * get_core_sibling - Get sibling core id from the same socket for given CPU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) * @cpu_no: CPU number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) * Return: > 0 on success, < 0 on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) int get_core_sibling(int cpu_no)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) char core_siblings_path[1024], cpu_list_str[64];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) int sibling_cpu_no = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) FILE *fp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) sprintf(core_siblings_path, "%s%d/topology/core_siblings_list",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) CORE_SIBLINGS_PATH, cpu_no);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) fp = fopen(core_siblings_path, "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) if (!fp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) perror("Failed to open core siblings path");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) if (fscanf(fp, "%s", cpu_list_str) <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) perror("Could not get core_siblings list");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) fclose(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) fclose(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) char *token = strtok(cpu_list_str, "-,");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) while (token) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) sibling_cpu_no = atoi(token);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) /* Skipping core 0 as we don't want to run test on core 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) if (sibling_cpu_no != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) token = strtok(NULL, "-,");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) return sibling_cpu_no;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) * taskset_benchmark - Taskset PID (i.e. benchmark) to a specified cpu
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) * @bm_pid: PID that should be binded
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) * @cpu_no: CPU number at which the PID would be binded
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) * Return: 0 on success, non-zero on failure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) int taskset_benchmark(pid_t bm_pid, int cpu_no)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) cpu_set_t my_set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) CPU_ZERO(&my_set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) CPU_SET(cpu_no, &my_set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) if (sched_setaffinity(bm_pid, sizeof(cpu_set_t), &my_set)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) perror("Unable to taskset benchmark");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) * run_benchmark - Run a specified benchmark or fill_buf (default benchmark)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) * in specified signal. Direct benchmark stdio to /dev/null.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) * @signum: signal number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) * @info: signal info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) * @ucontext: user context in signal handling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) * Return: void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) void run_benchmark(int signum, siginfo_t *info, void *ucontext)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) int operation, ret, malloc_and_init_memory, memflush;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) unsigned long span, buffer_span;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) char **benchmark_cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) char resctrl_val[64];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) FILE *fp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) benchmark_cmd = info->si_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) * Direct stdio of child to /dev/null, so that only parent writes to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) * stdio (console)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) fp = freopen("/dev/null", "w", stdout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) if (!fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) PARENT_EXIT("Unable to direct benchmark status to /dev/null");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) if (strcmp(benchmark_cmd[0], "fill_buf") == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) /* Execute default fill_buf benchmark */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) span = strtoul(benchmark_cmd[1], NULL, 10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) malloc_and_init_memory = atoi(benchmark_cmd[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) memflush = atoi(benchmark_cmd[3]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) operation = atoi(benchmark_cmd[4]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) sprintf(resctrl_val, "%s", benchmark_cmd[5]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) if (strncmp(resctrl_val, CQM_STR, sizeof(CQM_STR)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) buffer_span = span * MB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) buffer_span = span;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) if (run_fill_buf(buffer_span, malloc_and_init_memory, memflush,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) operation, resctrl_val))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) fprintf(stderr, "Error in running fill buffer\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) /* Execute specified benchmark */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) ret = execvp(benchmark_cmd[0], benchmark_cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) perror("wrong\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) fclose(stdout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) PARENT_EXIT("Unable to run specified benchmark");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) * create_grp - Create a group only if one doesn't exist
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) * @grp_name: Name of the group
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) * @grp: Full path and name of the group
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) * @parent_grp: Full path and name of the parent group
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) * Return: 0 on success, non-zero on failure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) static int create_grp(const char *grp_name, char *grp, const char *parent_grp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) int found_grp = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) struct dirent *ep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) DIR *dp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) * At this point, we are guaranteed to have resctrl FS mounted and if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) * length of grp_name == 0, it means, user wants to use root con_mon
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) * grp, so do nothing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) if (strlen(grp_name) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) /* Check if requested grp exists or not */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) dp = opendir(parent_grp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) if (dp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) while ((ep = readdir(dp)) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) if (strcmp(ep->d_name, grp_name) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) found_grp = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) closedir(dp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) perror("Unable to open resctrl for group");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) /* Requested grp doesn't exist, hence create it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) if (found_grp == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) if (mkdir(grp, 0) == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) perror("Unable to create group");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) static int write_pid_to_tasks(char *tasks, pid_t pid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) FILE *fp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) fp = fopen(tasks, "w");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) if (!fp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) perror("Failed to open tasks file");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) if (fprintf(fp, "%d\n", pid) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) perror("Failed to wr pid to tasks file");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) fclose(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) fclose(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) * write_bm_pid_to_resctrl - Write a PID (i.e. benchmark) to resctrl FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) * @bm_pid: PID that should be written
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) * @ctrlgrp: Name of the control monitor group (con_mon grp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) * @mongrp: Name of the monitor group (mon grp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) * @resctrl_val: Resctrl feature (Eg: mbm, mba.. etc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) * If a con_mon grp is requested, create it and write pid to it, otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) * write pid to root con_mon grp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) * If a mon grp is requested, create it and write pid to it, otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) * pid is not written, this means that pid is in con_mon grp and hence
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) * should consult con_mon grp's mon_data directory for results.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) * Return: 0 on success, non-zero on failure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) int write_bm_pid_to_resctrl(pid_t bm_pid, char *ctrlgrp, char *mongrp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) char *resctrl_val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) char controlgroup[128], monitorgroup[512], monitorgroup_p[256];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) char tasks[1024];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) if (strlen(ctrlgrp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) sprintf(controlgroup, "%s/%s", RESCTRL_PATH, ctrlgrp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) sprintf(controlgroup, "%s", RESCTRL_PATH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) /* Create control and monitoring group and write pid into it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) ret = create_grp(ctrlgrp, controlgroup, RESCTRL_PATH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) sprintf(tasks, "%s/tasks", controlgroup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) ret = write_pid_to_tasks(tasks, bm_pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) /* Create mon grp and write pid into it for "mbm" and "cqm" test */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) if (!strncmp(resctrl_val, CQM_STR, sizeof(CQM_STR)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) !strncmp(resctrl_val, MBM_STR, sizeof(MBM_STR))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) if (strlen(mongrp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) sprintf(monitorgroup_p, "%s/mon_groups", controlgroup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) sprintf(monitorgroup, "%s/%s", monitorgroup_p, mongrp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) ret = create_grp(mongrp, monitorgroup, monitorgroup_p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) sprintf(tasks, "%s/mon_groups/%s/tasks",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) controlgroup, mongrp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) ret = write_pid_to_tasks(tasks, bm_pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) printf("%sok writing benchmark parameters to resctrl FS\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) ret ? "not " : "");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) perror("# writing to resctrlfs");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) tests_run++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) * write_schemata - Update schemata of a con_mon grp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) * @ctrlgrp: Name of the con_mon grp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) * @schemata: Schemata that should be updated to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) * @cpu_no: CPU number that the benchmark PID is binded to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) * @resctrl_val: Resctrl feature (Eg: mbm, mba.. etc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) * Update schemata of a con_mon grp *only* if requested resctrl feature is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) * allocation type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) * Return: 0 on success, non-zero on failure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) int write_schemata(char *ctrlgrp, char *schemata, int cpu_no, char *resctrl_val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) char controlgroup[1024], schema[1024], reason[64];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) int resource_id, ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) FILE *fp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) if (strncmp(resctrl_val, MBA_STR, sizeof(MBA_STR)) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) strncmp(resctrl_val, CAT_STR, sizeof(CAT_STR)) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) strncmp(resctrl_val, CQM_STR, sizeof(CQM_STR)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) if (!schemata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) printf("# Skipping empty schemata update\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) if (get_resource_id(cpu_no, &resource_id) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) sprintf(reason, "Failed to get resource id");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) ret = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) if (strlen(ctrlgrp) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) sprintf(controlgroup, "%s/%s/schemata", RESCTRL_PATH, ctrlgrp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) sprintf(controlgroup, "%s/schemata", RESCTRL_PATH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) if (!strncmp(resctrl_val, CAT_STR, sizeof(CAT_STR)) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) !strncmp(resctrl_val, CQM_STR, sizeof(CQM_STR)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) sprintf(schema, "%s%d%c%s", "L3:", resource_id, '=', schemata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) if (!strncmp(resctrl_val, MBA_STR, sizeof(MBA_STR)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) sprintf(schema, "%s%d%c%s", "MB:", resource_id, '=', schemata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) fp = fopen(controlgroup, "w");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) if (!fp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) sprintf(reason, "Failed to open control group");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) ret = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) if (fprintf(fp, "%s\n", schema) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) sprintf(reason, "Failed to write schemata in control group");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) fclose(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) ret = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) fclose(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) printf("%sok Write schema \"%s\" to resctrl FS%s%s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) ret ? "not " : "", schema, ret ? " # " : "",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) ret ? reason : "");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) tests_run++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) bool check_resctrlfs_support(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) FILE *inf = fopen("/proc/filesystems", "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) DIR *dp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) char *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) bool ret = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) if (!inf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) res = fgrep(inf, "nodev\tresctrl\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) if (res) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) ret = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) free(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) fclose(inf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) printf("%sok kernel supports resctrl filesystem\n", ret ? "" : "not ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) tests_run++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) dp = opendir(RESCTRL_PATH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) printf("%sok resctrl mountpoint \"%s\" exists\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) dp ? "" : "not ", RESCTRL_PATH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) if (dp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) closedir(dp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) tests_run++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) printf("# resctrl filesystem %s mounted\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) find_resctrl_mount(NULL) ? "not" : "is");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) char *fgrep(FILE *inf, const char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) char line[256];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) int slen = strlen(str);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) while (!feof(inf)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) if (!fgets(line, 256, inf))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) if (strncmp(line, str, slen))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) return strdup(line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) * validate_resctrl_feature_request - Check if requested feature is valid.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) * @resctrl_val: Requested feature
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) * Return: 0 on success, non-zero on failure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) bool validate_resctrl_feature_request(char *resctrl_val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) FILE *inf = fopen("/proc/cpuinfo", "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) bool found = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) char *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) if (!inf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) res = fgrep(inf, "flags");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) if (res) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) char *s = strchr(res, ':');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) found = s && !strstr(s, resctrl_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) free(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) fclose(inf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) return found;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) int filter_dmesg(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) char line[1024];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) FILE *fp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) int pipefds[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) pid_t pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) ret = pipe(pipefds);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) perror("pipe");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) pid = fork();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) if (pid == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) close(pipefds[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) dup2(pipefds[1], STDOUT_FILENO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) execlp("dmesg", "dmesg", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) perror("executing dmesg");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) exit(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) close(pipefds[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) fp = fdopen(pipefds[0], "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) if (!fp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) perror("fdopen(pipe)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) kill(pid, SIGTERM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) while (fgets(line, 1024, fp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) if (strstr(line, "intel_rdt:"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) printf("# dmesg: %s", line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) if (strstr(line, "resctrl:"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) printf("# dmesg: %s", line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) fclose(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) waitpid(pid, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) int validate_bw_report_request(char *bw_report)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) if (strcmp(bw_report, "reads") == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) if (strcmp(bw_report, "writes") == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) if (strcmp(bw_report, "nt-writes") == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) strcpy(bw_report, "writes");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) if (strcmp(bw_report, "total") == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) fprintf(stderr, "Requested iMC B/W report type unavailable\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) int perf_event_open(struct perf_event_attr *hw_event, pid_t pid, int cpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) int group_fd, unsigned long flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) ret = syscall(__NR_perf_event_open, hw_event, pid, cpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) group_fd, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) unsigned int count_bits(unsigned long n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) unsigned int count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) while (n) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) count += n & 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) n >>= 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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