diff options
Diffstat (limited to 'tools/power/x86/intel-speed-select/isst-config.c')
| -rw-r--r-- | tools/power/x86/intel-speed-select/isst-config.c | 155 |
1 files changed, 154 insertions, 1 deletions
diff --git a/tools/power/x86/intel-speed-select/isst-config.c b/tools/power/x86/intel-speed-select/isst-config.c index a9bd87b4d4ee..c4d00426cb6a 100644 --- a/tools/power/x86/intel-speed-select/isst-config.c +++ b/tools/power/x86/intel-speed-select/isst-config.c @@ -44,6 +44,7 @@ static int cmd_help; static int force_online_offline; static int auto_mode; static int fact_enable_fail; +static int cgroupv2; /* clos related */ static int current_clos = -1; @@ -834,7 +835,137 @@ int find_phy_core_num(int logical_cpu) return -EINVAL; } +int use_cgroupv2(void) +{ + return cgroupv2; +} + +int enable_cpuset_controller(void) +{ + int fd, ret; + + fd = open("/sys/fs/cgroup/cgroup.subtree_control", O_RDWR, 0); + if (fd < 0) { + debug_printf("Can't activate cpuset controller\n"); + debug_printf("Either you are not root user or CGroup v2 is not supported\n"); + return fd; + } + + ret = write(fd, " +cpuset", strlen(" +cpuset")); + close(fd); + + if (ret == -1) { + debug_printf("Can't activate cpuset controller: Write failed\n"); + return ret; + } + + return 0; +} + +int isolate_cpus(struct isst_id *id, int mask_size, cpu_set_t *cpu_mask, int level) +{ + int i, first, curr_index, index, ret, fd; + static char str[512], dir_name[64]; + static char cpuset_cpus[128]; + int str_len = sizeof(str); + DIR *dir; + + snprintf(dir_name, sizeof(dir_name), "/sys/fs/cgroup/%d-%d-%d", id->pkg, id->die, id->punit); + dir = opendir(dir_name); + if (!dir) { + ret = mkdir(dir_name, 0744); + if (ret) { + debug_printf("Can't create dir:%s errno:%d\n", dir_name, errno); + return ret; + } + } + closedir(dir); + + if (!level) { + sprintf(cpuset_cpus, "%s/cpuset.cpus.partition", dir_name); + + fd = open(cpuset_cpus, O_RDWR, 0); + if (fd < 0) { + return fd; + } + + ret = write(fd, "member", strlen("member")); + if (ret == -1) { + printf("Can't update to member\n"); + return ret; + } + + return 0; + } + + if (!CPU_COUNT_S(mask_size, cpu_mask)) { + return -1; + } + curr_index = 0; + first = 1; + str[0] = '\0'; + for (i = 0; i < get_topo_max_cpus(); ++i) { + if (!is_cpu_in_power_domain(i, id)) + continue; + + if (CPU_ISSET_S(i, mask_size, cpu_mask)) + continue; + + if (!first) { + index = snprintf(&str[curr_index], + str_len - curr_index, ","); + curr_index += index; + if (curr_index >= str_len) + break; + } + index = snprintf(&str[curr_index], str_len - curr_index, "%d", + i); + curr_index += index; + if (curr_index >= str_len) + break; + first = 0; + } + + debug_printf("isolated CPUs list: package:%d curr_index:%d [%s]\n", id->pkg, curr_index ,str); + + snprintf(cpuset_cpus, sizeof(cpuset_cpus), "%s/cpuset.cpus", dir_name); + + fd = open(cpuset_cpus, O_RDWR, 0); + if (fd < 0) { + return fd; + } + + ret = write(fd, str, strlen(str)); + close(fd); + + if (ret == -1) { + debug_printf("Can't activate cpuset controller: Write failed\n"); + return ret; + } + + snprintf(cpuset_cpus, sizeof(cpuset_cpus), "%s/cpuset.cpus.partition", dir_name); + + fd = open(cpuset_cpus, O_RDWR, 0); + if (fd < 0) { + return fd; + } + + ret = write(fd, "isolated", strlen("isolated")); + if (ret == -1) { + debug_printf("Can't update to isolated\n"); + ret = write(fd, "root", strlen("root")); + if (ret == -1) + debug_printf("Can't update to root\n"); + } + + close(fd); + + if (ret < 0) + return ret; + + return 0; +} static int isst_fill_platform_info(void) { @@ -1273,6 +1404,23 @@ display_result: isst_display_error_info_message(1, "Can't get coremask, online/offline option is ignored", 0, 0); goto free_mask; } + + if (use_cgroupv2()) { + int ret; + + fprintf(stderr, "Using cgroup v2 in lieu of online/offline\n"); + ret = enable_cpuset_controller(); + if (ret) + goto use_offline; + + ret = isolate_cpus(id, ctdp_level.core_cpumask_size, ctdp_level.core_cpumask, tdp_level); + if (ret) + goto use_offline; + + goto free_mask; + } + +use_offline: if (ctdp_level.cpu_count) { int i, max_cpus = get_topo_max_cpus(); for (i = 0; i < max_cpus; ++i) { @@ -2787,6 +2935,7 @@ static void usage(void) printf("\t[-b|--oob : Start a daemon to process HFI events for perf profile change from Out of Band agent.\n"); printf("\t[-n|--no-daemon : Don't run as daemon. By default --oob will turn on daemon mode\n"); printf("\t[-w|--delay : Delay for reading config level state change in OOB poll mode.\n"); + printf("\t[-g|--cgroupv2 : Try to use cgroup v2 CPU isolation instead of CPU online/offline.\n"); printf("\nResult format\n"); printf("\tResult display uses a common format for each command:\n"); printf("\tResults are formatted in text/JSON with\n"); @@ -2839,6 +2988,7 @@ static void cmdline(int argc, char **argv) { "oob", no_argument, 0, 'b' }, { "no-daemon", no_argument, 0, 'n' }, { "poll-interval", required_argument, 0, 'w' }, + { "cgroupv2", required_argument, 0, 'g' }, { 0, 0, 0, 0 } }; @@ -2869,7 +3019,7 @@ static void cmdline(int argc, char **argv) goto out; progname = argv[0]; - while ((opt = getopt_long_only(argc, argv, "+c:df:hio:vabw:n", long_options, + while ((opt = getopt_long_only(argc, argv, "+c:df:hio:vabw:ng", long_options, &option_index)) != -1) { switch (opt) { case 'a': @@ -2928,6 +3078,9 @@ static void cmdline(int argc, char **argv) } poll_interval = ret; break; + case 'g': + cgroupv2 = 1; + break; default: usage(); } |