1 // SPDX-License-Identifier: GPL-2.0
27  * err_msg - print an error message to the stderr
42  * debug_msg - print a debug message to stderr if debug is set
60  * get_llong_from_str - get a long long int from a string
70 		return -1;  in get_llong_from_str()
76  * get_duration - fill output with a human readable duration since start_time
82 	time_t duration;  in get_duration()  local
84 	duration = difftime(now, start_time);  in get_duration()
85 	tm_info = gmtime(&duration);  in get_duration()
88 			tm_info->tm_yday,  in get_duration()
89 			tm_info->tm_hour,  in get_duration()
90 			tm_info->tm_min,  in get_duration()
91 			tm_info->tm_sec);  in get_duration()
95  * parse_cpu_set - parse a cpu_list filling cpu_set_t argument
97  * Receives a cpu list, like 1-3,5 (cpus 1, 2, 3, 5), and then set
121 		if (*p == '-') {  in parse_cpu_set()
152  * parse_duration - parse duration with s/m/h/d suffix converting it to seconds
186  * parse_ns_duration - parse duration with ns/us/ms/s converting it to nanoseconds
196 		if (!strncmp(end, "ns", 2)) {  in parse_ns_duration()
208 		return -1;  in parse_ns_duration()
256  * procfs_is_workload_pid - check if a procfs entry contains a comm_prefix* comm
272 	if (proc_entry->d_type != DT_DIR)  in procfs_is_workload_pid()
275 	if (*proc_entry->d_name == '.')  in procfs_is_workload_pid()
279 	for (t_name = proc_entry->d_name; t_name; t_name++) {  in procfs_is_workload_pid()
287 	snprintf(buffer, MAX_PATH, "/proc/%s/comm", proc_entry->d_name);  in procfs_is_workload_pid()
305 	debug_msg("Found workload pid:%s comm:%s", proc_entry->d_name, buffer);  in procfs_is_workload_pid()
311  * set_comm_sched_attr - set sched params to threads starting with char *comm_prefix
343 		retval = __set_sched_attr(atoi(proc_entry->d_name), attr);  in set_comm_sched_attr()
345 			err_msg("Error setting sched attributes for pid:%s\n", proc_entry->d_name);  in set_comm_sched_attr()
349 		debug_msg("Set sched attributes for pid:%s\n", proc_entry->d_name);  in set_comm_sched_attr()
366 		return -1;  in get_long_ns_after_colon()
382 		return -1;  in get_long_after_colon()
413 	sched_param->size = sizeof(*sched_param);  in parse_prio()
420 			return -1;  in parse_prio()
424 			return -1;  in parse_prio()
428 			return -1;  in parse_prio()
431 			return -1;  in parse_prio()
433 		sched_param->sched_policy   = SCHED_DEADLINE;  in parse_prio()
434 		sched_param->sched_runtime  = runtime;  in parse_prio()
435 		sched_param->sched_deadline = period;  in parse_prio()
436 		sched_param->sched_period   = period;  in parse_prio()
443 			return -1;  in parse_prio()
446 			return -1;  in parse_prio()
448 			return -1;  in parse_prio()
450 		sched_param->sched_policy   = SCHED_FIFO;  in parse_prio()
451 		sched_param->sched_priority = prio;  in parse_prio()
458 			return -1;  in parse_prio()
461 			return -1;  in parse_prio()
463 			return -1;  in parse_prio()
465 		sched_param->sched_policy   = SCHED_RR;  in parse_prio()
466 		sched_param->sched_priority = prio;  in parse_prio()
473 			return -1;  in parse_prio()
476 			return -1;  in parse_prio()
478 			return -1;  in parse_prio()
480 		sched_param->sched_policy   = SCHED_OTHER;  in parse_prio()
481 		sched_param->sched_nice = prio;  in parse_prio()
484 		return -1;  in parse_prio()
490  * set_cpu_dma_latency - set the /dev/cpu_dma_latecy
506 		return -1;  in set_cpu_dma_latency()
513 		return -1;  in set_cpu_dma_latency()
526  * save_cpu_idle_state_disable - save disable for all idle states of a cpu
549 			return -1;  in save_cpu_idle_disable_state()
554 		return -1;  in save_cpu_idle_disable_state()
568  * restore_cpu_idle_disable_state - restore disable for all idle states of a cpu
588 		return -1;  in restore_cpu_idle_disable_state()
592 			return -1;  in restore_cpu_idle_disable_state()
601 	saved_cpu_idle_disable_state_alloc_ctr--;  in restore_cpu_idle_disable_state()
611  * free_cpu_idle_disable_states - free saved idle state disable for all cpus
640  * set_deepest_cpu_idle_state - limit idle state of cpu
672  * find_mount - find a the mount point of a given fs
700 	strncpy(mp, mount_point, sizeof_mp - 1);  in find_mount()
707  * get_self_cgroup - get the current thread cgroup path
711  * 0::/user.slice/user-0.slice/session-3.scope'\n'
770  * set_comm_cgroup - Set cgroup to pid_t pid
781 	char cgroup_path[MAX_PATH - strlen("/cgroup.procs")];  in set_pid_cgroup()
795 				sizeof(cgroup_path) - strlen(cgroup_path));  in set_pid_cgroup()
802 				sizeof(cgroup_path) - strlen(cgroup_path), "%s/", cgroup);  in set_pid_cgroup()
817 		err_msg("Error setting cgroup attributes for pid:%s - %s\n",  in set_pid_cgroup()
828  * set_comm_cgroup - Set cgroup to threads starting with char *comm_prefix
839 	char cgroup_path[MAX_PATH - strlen("/cgroup.procs")];  in set_comm_cgroup()
860 				sizeof(cgroup_path) - strlen(cgroup_path));  in set_comm_cgroup()
867 				sizeof(cgroup_path) - strlen(cgroup_path), "%s/", cgroup);  in set_comm_cgroup()
890 		retval = write(cg_fd, proc_entry->d_name, strlen(proc_entry->d_name));  in set_comm_cgroup()
892 			err_msg("Error setting cgroup attributes for pid:%s - %s\n",  in set_comm_cgroup()
893 				proc_entry->d_name, strerror(errno));  in set_comm_cgroup()
897 		debug_msg("Set cgroup attributes for pid:%s\n", proc_entry->d_name);  in set_comm_cgroup()
912  * auto_house_keeping - Automatically move rtla out of measurement threads
925 	if (retval == -1) {  in auto_house_keeping()
930 	/* then check if the existing setup is already good. */  in auto_house_keeping()
934 		debug_msg("Skipping auto house-keeping\n");  in auto_house_keeping()
946 		debug_msg("Could not find any CPU for auto house-keeping\n");  in auto_house_keeping()
951 	if (retval == -1) {  in auto_house_keeping()
952 		debug_msg("Could not set affinity for auto house-keeping\n");  in auto_house_keeping()
956 	debug_msg("rtla automatically moved to an auto house-keeping cpu set\n");  in auto_house_keeping()