1 // SPDX-License-Identifier: GPL-2.0
24  * err_msg - print an error message to the stderr
39  * debug_msg - print a debug message to stderr if debug is set
57  * get_llong_from_str - get a long long int from a string
67 		return -1;  in get_llong_from_str()
73  * get_duration - fill output with a human readable duration since start_time
79 	time_t duration;  in get_duration()  local
81 	duration = difftime(now, start_time);  in get_duration()
82 	tm_info = gmtime(&duration);  in get_duration()
85 			tm_info->tm_yday,  in get_duration()
86 			tm_info->tm_hour,  in get_duration()
87 			tm_info->tm_min,  in get_duration()
88 			tm_info->tm_sec);  in get_duration()
92  * parse_cpu_set - parse a cpu_list filling cpu_set_t argument
94  * Receives a cpu list, like 1-3,5 (cpus 1, 2, 3, 5), and then set
118 		if (*p == '-') {  in parse_cpu_set()
149  * parse_duration - parse duration with s/m/h/d suffix converting it to seconds
183  * parse_ns_duration - parse duration with ns/us/ms/s converting it to nanoseconds
193 		if (!strncmp(end, "ns", 2)) {  in parse_ns_duration()
205 		return -1;  in parse_ns_duration()
257  * procfs_is_workload_pid - check if a procfs entry contains a comm_prefix* comm
273 	if (proc_entry->d_type != DT_DIR)  in procfs_is_workload_pid()
276 	if (*proc_entry->d_name == '.')  in procfs_is_workload_pid()
280 	for (t_name = proc_entry->d_name; t_name; t_name++) {  in procfs_is_workload_pid()
288 	snprintf(buffer, MAX_PATH, "/proc/%s/comm", proc_entry->d_name);  in procfs_is_workload_pid()
306 	debug_msg("Found workload pid:%s comm:%s", proc_entry->d_name, buffer);  in procfs_is_workload_pid()
312  * set_comm_sched_attr - set sched params to threads starting with char *comm_prefix
344 		retval = __set_sched_attr(atoi(proc_entry->d_name), attr);  in set_comm_sched_attr()
346 			err_msg("Error setting sched attributes for pid:%s\n", proc_entry->d_name);  in set_comm_sched_attr()
350 		debug_msg("Set sched attributes for pid:%s\n", proc_entry->d_name);  in set_comm_sched_attr()
367 		return -1;  in get_long_ns_after_colon()
383 		return -1;  in get_long_after_colon()
414 	sched_param->size = sizeof(*sched_param);  in parse_prio()
421 			return -1;  in parse_prio()
425 			return -1;  in parse_prio()
429 			return -1;  in parse_prio()
432 			return -1;  in parse_prio()
434 		sched_param->sched_policy   = SCHED_DEADLINE;  in parse_prio()
435 		sched_param->sched_runtime  = runtime;  in parse_prio()
436 		sched_param->sched_deadline = period;  in parse_prio()
437 		sched_param->sched_period   = period;  in parse_prio()
444 			return -1;  in parse_prio()
447 			return -1;  in parse_prio()
449 			return -1;  in parse_prio()
451 		sched_param->sched_policy   = SCHED_FIFO;  in parse_prio()
452 		sched_param->sched_priority = prio;  in parse_prio()
459 			return -1;  in parse_prio()
462 			return -1;  in parse_prio()
464 			return -1;  in parse_prio()
466 		sched_param->sched_policy   = SCHED_RR;  in parse_prio()
467 		sched_param->sched_priority = prio;  in parse_prio()
474 			return -1;  in parse_prio()
477 			return -1;  in parse_prio()
479 			return -1;  in parse_prio()
481 		sched_param->sched_policy   = SCHED_OTHER;  in parse_prio()
482 		sched_param->sched_nice = prio;  in parse_prio()
485 		return -1;  in parse_prio()
491  * set_cpu_dma_latency - set the /dev/cpu_dma_latecy
507 		return -1;  in set_cpu_dma_latency()
514 		return -1;  in set_cpu_dma_latency()
526  * find_mount - find a the mount point of a given fs
554 	strncpy(mp, mount_point, sizeof_mp - 1);  in find_mount()
561  * get_self_cgroup - get the current thread cgroup path
565  * 0::/user.slice/user-0.slice/session-3.scope'\n'
624  * set_comm_cgroup - Set cgroup to pid_t pid
635 	char cgroup_path[MAX_PATH - strlen("/cgroup.procs")];  in set_pid_cgroup()
649 				sizeof(cgroup_path) - strlen(cgroup_path));  in set_pid_cgroup()
656 				sizeof(cgroup_path) - strlen(cgroup_path), "%s/", cgroup);  in set_pid_cgroup()
671 		err_msg("Error setting cgroup attributes for pid:%s - %s\n",  in set_pid_cgroup()
682  * set_comm_cgroup - Set cgroup to threads starting with char *comm_prefix
693 	char cgroup_path[MAX_PATH - strlen("/cgroup.procs")];  in set_comm_cgroup()
714 				sizeof(cgroup_path) - strlen(cgroup_path));  in set_comm_cgroup()
721 				sizeof(cgroup_path) - strlen(cgroup_path), "%s/", cgroup);  in set_comm_cgroup()
744 		retval = write(cg_fd, proc_entry->d_name, strlen(proc_entry->d_name));  in set_comm_cgroup()
746 			err_msg("Error setting cgroup attributes for pid:%s - %s\n",  in set_comm_cgroup()
747 				proc_entry->d_name, strerror(errno));  in set_comm_cgroup()
751 		debug_msg("Set cgroup attributes for pid:%s\n", proc_entry->d_name);  in set_comm_cgroup()
766  * auto_house_keeping - Automatically move rtla out of measurement threads
779 	if (retval == -1) {  in auto_house_keeping()
784 	/* then check if the existing setup is already good. */  in auto_house_keeping()
788 		debug_msg("Skipping auto house-keeping\n");  in auto_house_keeping()
800 		debug_msg("Could not find any CPU for auto house-keeping\n");  in auto_house_keeping()
805 	if (retval == -1) {  in auto_house_keeping()
806 		debug_msg("Could not set affinity for auto house-keeping\n");  in auto_house_keeping()
810 	debug_msg("rtla automatically moved to an auto house-keeping cpu set\n");  in auto_house_keeping()