1 // SPDX-License-Identifier: GPL-2.0
25  * Per-cpu data statistics and data.
66 	 * If now - timestamp is <= latency, it might have influenced
137  * timerlat_aa_get_data - Get the per-cpu data from the timerlat context
142 	return &taa_ctx->taa_data[cpu];  in timerlat_aa_get_data()
146  * timerlat_aa_irq_latency - Handles timerlat IRQ event
156 	taa_data->curr_state = TIMERLAT_WAITING_THREAD;  in timerlat_aa_irq_latency()
157 	taa_data->tlat_irq_timstamp = record->ts;  in timerlat_aa_irq_latency()
162 	taa_data->thread_nmi_sum = 0;  in timerlat_aa_irq_latency()
163 	taa_data->thread_irq_sum = 0;  in timerlat_aa_irq_latency()
164 	taa_data->thread_softirq_sum = 0;  in timerlat_aa_irq_latency()
165 	taa_data->thread_thread_sum = 0;  in timerlat_aa_irq_latency()
166 	taa_data->thread_blocking_duration = 0;  in timerlat_aa_irq_latency()
167 	taa_data->timer_irq_start_time = 0;  in timerlat_aa_irq_latency()
168 	taa_data->timer_irq_duration = 0;  in timerlat_aa_irq_latency()
169 	taa_data->timer_exit_from_idle = 0;  in timerlat_aa_irq_latency()
174 	trace_seq_reset(taa_data->nmi_seq);  in timerlat_aa_irq_latency()
175 	trace_seq_reset(taa_data->irqs_seq);  in timerlat_aa_irq_latency()
176 	trace_seq_reset(taa_data->softirqs_seq);  in timerlat_aa_irq_latency()
177 	trace_seq_reset(taa_data->threads_seq);  in timerlat_aa_irq_latency()
180 	tep_get_field_val(s, event, "timer_latency", record, &taa_data->tlat_irq_latency, 1);  in timerlat_aa_irq_latency()
181 	tep_get_field_val(s, event, "seqnum", record, &taa_data->tlat_irq_seqnum, 1);  in timerlat_aa_irq_latency()
184 	tep_get_common_field_val(s, event, "common_pid", record, &taa_data->run_thread_pid, 1);  in timerlat_aa_irq_latency()
191 	if (taa_data->run_thread_pid)  in timerlat_aa_irq_latency()
197 	if (taa_data->tlat_irq_latency < taa_data->max_exit_idle_latency)  in timerlat_aa_irq_latency()
204 	if (taa_data->tlat_irq_timstamp - taa_data->tlat_irq_latency  in timerlat_aa_irq_latency()
205 	    < taa_data->prev_irq_timstamp + taa_data->prev_irq_duration)  in timerlat_aa_irq_latency()
208 	taa_data->max_exit_idle_latency = taa_data->tlat_irq_latency;  in timerlat_aa_irq_latency()
214  * timerlat_aa_thread_latency - Handles timerlat thread event
224 	taa_data->curr_state = TIMERLAT_WAITING_IRQ;  in timerlat_aa_thread_latency()
225 	taa_data->tlat_thread_timstamp = record->ts;  in timerlat_aa_thread_latency()
228 	tep_get_field_val(s, event, "timer_latency", record, &taa_data->tlat_thread_latency, 1);  in timerlat_aa_thread_latency()
229 	tep_get_field_val(s, event, "seqnum", record, &taa_data->tlat_thread_seqnum, 1);  in timerlat_aa_thread_latency()
235  * timerlat_aa_handler - Handle timerlat events
239  * Returns 0 on success, -1 otherwise.
245 	struct timerlat_aa_data *taa_data = timerlat_aa_get_data(taa_ctx, record->cpu);  in timerlat_aa_handler()
249 		return -1;  in timerlat_aa_handler()
259  * timerlat_aa_nmi_handler - Handles NMI noise
268 	struct timerlat_aa_data *taa_data = timerlat_aa_get_data(taa_ctx, record->cpu);  in timerlat_aa_nmi_handler()
269 	unsigned long long duration;  in timerlat_aa_nmi_handler()  local
272 	tep_get_field_val(s, event, "duration", record, &duration, 1);  in timerlat_aa_nmi_handler()
275 	if (taa_data->curr_state == TIMERLAT_WAITING_IRQ) {  in timerlat_aa_nmi_handler()
276 		taa_data->prev_irq_duration = duration;  in timerlat_aa_nmi_handler()
277 		taa_data->prev_irq_timstamp = start;  in timerlat_aa_nmi_handler()
279 		trace_seq_reset(taa_data->prev_irqs_seq);  in timerlat_aa_nmi_handler()
280 		trace_seq_printf(taa_data->prev_irqs_seq, "  %24s %.*s %9.2f us\n",  in timerlat_aa_nmi_handler()
283 				 ns_to_usf(duration));  in timerlat_aa_nmi_handler()
287 	taa_data->thread_nmi_sum += duration;  in timerlat_aa_nmi_handler()
288 	trace_seq_printf(taa_data->nmi_seq, "  %24s %.*s %9.2f us\n",  in timerlat_aa_nmi_handler()
290 			 24, spaces, ns_to_usf(duration));  in timerlat_aa_nmi_handler()
296  * timerlat_aa_irq_handler - Handles IRQ noise
302  *	- The IRQs that can delay the timer IRQ before it happened.
303  *	- The Timerlat IRQ handler
304  *	- The IRQs that happened between the timerlat IRQ and the timerlat thread
311 	struct timerlat_aa_data *taa_data = timerlat_aa_get_data(taa_ctx, record->cpu);  in timerlat_aa_irq_handler()
313 	unsigned long long duration;  in timerlat_aa_irq_handler()  local
319 	tep_get_field_val(s, event, "duration", record, &duration, 1);  in timerlat_aa_irq_handler()
327 	if (taa_data->curr_state == TIMERLAT_WAITING_IRQ) {  in timerlat_aa_irq_handler()
328 		taa_data->prev_irq_duration = duration;  in timerlat_aa_irq_handler()
329 		taa_data->prev_irq_timstamp = start;  in timerlat_aa_irq_handler()
331 		trace_seq_reset(taa_data->prev_irqs_seq);  in timerlat_aa_irq_handler()
332 		trace_seq_printf(taa_data->prev_irqs_seq, "  %24s:%-3llu %.*s %9.2f us\n",  in timerlat_aa_irq_handler()
335 				 ns_to_usf(duration));  in timerlat_aa_irq_handler()
340 	 * The timerlat IRQ: taa_data->timer_irq_start_time is zeroed at  in timerlat_aa_irq_handler()
343 	if (!taa_data->timer_irq_start_time) {  in timerlat_aa_irq_handler()
344 		expected_start = taa_data->tlat_irq_timstamp - taa_data->tlat_irq_latency;  in timerlat_aa_irq_handler()
346 		taa_data->timer_irq_start_time = start;  in timerlat_aa_irq_handler()
347 		taa_data->timer_irq_duration = duration;  in timerlat_aa_irq_handler()
362 		if (expected_start < taa_data->timer_irq_start_time)  in timerlat_aa_irq_handler()
363 			taa_data->timer_irq_start_delay = taa_data->timer_irq_start_time - expected_start;  in timerlat_aa_irq_handler()
365 			taa_data->timer_irq_start_delay = 0;  in timerlat_aa_irq_handler()
370 		if (taa_data->run_thread_pid)  in timerlat_aa_irq_handler()
373 		if (expected_start > taa_data->prev_irq_timstamp + taa_data->prev_irq_duration)  in timerlat_aa_irq_handler()
374 			taa_data->timer_exit_from_idle = taa_data->timer_irq_start_delay;  in timerlat_aa_irq_handler()
382 	taa_data->thread_irq_sum += duration;  in timerlat_aa_irq_handler()
383 	trace_seq_printf(taa_data->irqs_seq, "  %24s:%-3llu %.*s %9.2f us\n",  in timerlat_aa_irq_handler()
386 			 ns_to_usf(duration));  in timerlat_aa_irq_handler()
396  * timerlat_aa_softirq_handler - Handles Softirq noise
401  * It is only printed in the non-rt kernel, as softirqs become thread on RT.
407 	struct timerlat_aa_data *taa_data = timerlat_aa_get_data(taa_ctx, record->cpu);  in timerlat_aa_softirq_handler()
408 	unsigned long long duration;  in timerlat_aa_softirq_handler()  local
412 	if (taa_data->curr_state == TIMERLAT_WAITING_IRQ)  in timerlat_aa_softirq_handler()
415 	tep_get_field_val(s, event, "duration", record, &duration, 1);  in timerlat_aa_softirq_handler()
419 	taa_data->thread_softirq_sum += duration;  in timerlat_aa_softirq_handler()
421 	trace_seq_printf(taa_data->softirqs_seq, "  %24s:%-3llu %.*s %9.2f us\n",  in timerlat_aa_softirq_handler()
424 			 ns_to_usf(duration));  in timerlat_aa_softirq_handler()
429  * timerlat_aa_softirq_handler - Handles thread noise
440 	struct timerlat_aa_data *taa_data = timerlat_aa_get_data(taa_ctx, record->cpu);  in timerlat_aa_thread_handler()
441 	unsigned long long duration;  in timerlat_aa_thread_handler()  local
447 	if (taa_data->curr_state == TIMERLAT_WAITING_IRQ)  in timerlat_aa_thread_handler()
450 	tep_get_field_val(s, event, "duration", record, &duration, 1);  in timerlat_aa_thread_handler()
456 	if (pid == taa_data->run_thread_pid && !taa_data->thread_blocking_duration) {  in timerlat_aa_thread_handler()
457 		taa_data->thread_blocking_duration = duration;  in timerlat_aa_thread_handler()
460 			strncpy(taa_data->run_thread_comm, comm, MAX_COMM);  in timerlat_aa_thread_handler()
462 			sprintf(taa_data->run_thread_comm, "<...>");  in timerlat_aa_thread_handler()
465 		taa_data->thread_thread_sum += duration;  in timerlat_aa_thread_handler()
467 		trace_seq_printf(taa_data->threads_seq, "  %24s:%-12llu %.*s %9.2f us\n",  in timerlat_aa_thread_handler()
470 				 ns_to_usf(duration));  in timerlat_aa_thread_handler()
477  * timerlat_aa_stack_handler - Handles timerlat IRQ stack trace
485 	struct timerlat_aa_data *taa_data = timerlat_aa_get_data(taa_ctx, record->cpu);  in timerlat_aa_stack_handler()
490 	trace_seq_reset(taa_data->stack_seq);  in timerlat_aa_stack_handler()
492 	trace_seq_printf(taa_data->stack_seq, "    Blocking thread stack trace\n");  in timerlat_aa_stack_handler()
496 			function = tep_find_function(taa_ctx->tool->trace.tep, caller[i]);  in timerlat_aa_stack_handler()
499 			trace_seq_printf(taa_data->stack_seq, " %.*s -> %s\n",  in timerlat_aa_stack_handler()
507  * timerlat_aa_sched_switch_handler - Tracks the current thread running on the CPU
517 	struct timerlat_aa_data *taa_data = timerlat_aa_get_data(taa_ctx, record->cpu);  in timerlat_aa_sched_switch_handler()
521 	tep_get_field_val(s, event, "next_pid", record, &taa_data->current_pid, 1);  in timerlat_aa_sched_switch_handler()
524 	strncpy(taa_data->current_comm, comm, MAX_COMM);  in timerlat_aa_sched_switch_handler()
529 	taa_data->kworker = 0;  in timerlat_aa_sched_switch_handler()
530 	taa_data->kworker_func = 0;  in timerlat_aa_sched_switch_handler()
536  * timerlat_aa_kworker_start_handler - Tracks a kworker running on the CPU
548 	struct timerlat_aa_data *taa_data = timerlat_aa_get_data(taa_ctx, record->cpu);  in timerlat_aa_kworker_start_handler()
550 	tep_get_field_val(s, event, "work", record, &taa_data->kworker, 1);  in timerlat_aa_kworker_start_handler()
551 	tep_get_field_val(s, event, "function", record, &taa_data->kworker_func, 1);  in timerlat_aa_kworker_start_handler()
556  * timerlat_thread_analysis - Prints the analysis of a CPU that hit a stop tracing
570 	if (taa_data->tlat_irq_seqnum > taa_data->tlat_thread_seqnum) {  in timerlat_thread_analysis()
572 		total = taa_data->tlat_irq_latency;  in timerlat_thread_analysis()
575 		total = taa_data->tlat_thread_latency;  in timerlat_thread_analysis()
583 	exp_irq_ts = taa_data->timer_irq_start_time - taa_data->timer_irq_start_delay;  in timerlat_thread_analysis()
584 	if (exp_irq_ts < taa_data->prev_irq_timstamp + taa_data->prev_irq_duration) {  in timerlat_thread_analysis()
585 		if (taa_data->prev_irq_timstamp < taa_data->timer_irq_start_time)  in timerlat_thread_analysis()
586 			printf("  Previous IRQ interference: %.*s up to  %9.2f us\n",  in timerlat_thread_analysis()
588 			       ns_to_usf(taa_data->prev_irq_duration));  in timerlat_thread_analysis()
594 	printf("  IRQ handler delay: %.*s %16s  %9.2f us (%.2f %%)\n", 16, spaces,  in timerlat_thread_analysis()
595 	       (ns_to_usf(taa_data->timer_exit_from_idle) > 10) ? "(exit from idle)" : "",  in timerlat_thread_analysis()
596 	       ns_to_usf(taa_data->timer_irq_start_delay),  in timerlat_thread_analysis()
597 	       ns_to_per(total, taa_data->timer_irq_start_delay));  in timerlat_thread_analysis()
602 	printf("  IRQ latency: %.*s %9.2f us\n", 40, spaces,  in timerlat_thread_analysis()
603 	       ns_to_usf(taa_data->tlat_irq_latency));  in timerlat_thread_analysis()
608 		 * because... the trace stopped :-).  in timerlat_thread_analysis()
614 		printf(" %.*s %24s:%-9llu\n", 6, spaces, taa_data->run_thread_comm,  in timerlat_thread_analysis()
615 		       taa_data->run_thread_pid);  in timerlat_thread_analysis()
618 		 * The duration of the IRQ handler that handled the timerlat IRQ.  in timerlat_thread_analysis()
620 		printf("  Timerlat IRQ duration: %.*s %9.2f us (%.2f %%)\n",  in timerlat_thread_analysis()
622 		       ns_to_usf(taa_data->timer_irq_duration),  in timerlat_thread_analysis()
623 		       ns_to_per(total, taa_data->timer_irq_duration));  in timerlat_thread_analysis()
631 		printf("  Blocking thread: %.*s %9.2f us (%.2f %%)\n", 36, spaces,  in timerlat_thread_analysis()
632 		       ns_to_usf(taa_data->thread_blocking_duration),  in timerlat_thread_analysis()
633 		       ns_to_per(total, taa_data->thread_blocking_duration));  in timerlat_thread_analysis()
635 		printf(" %.*s %24s:%-9llu %.*s %9.2f us\n", 6, spaces,  in timerlat_thread_analysis()
636 		       taa_data->run_thread_comm, taa_data->run_thread_pid,  in timerlat_thread_analysis()
637 		       12, spaces, ns_to_usf(taa_data->thread_blocking_duration));  in timerlat_thread_analysis()
643 	trace_seq_do_printf(taa_data->stack_seq);  in timerlat_thread_analysis()
648 	if (taa_data->thread_nmi_sum)  in timerlat_thread_analysis()
649 		printf("  NMI interference %.*s %9.2f us (%.2f %%)\n", 36, spaces,  in timerlat_thread_analysis()
650 		       ns_to_usf(taa_data->thread_nmi_sum),  in timerlat_thread_analysis()
651 		       ns_to_per(total, taa_data->thread_nmi_sum));  in timerlat_thread_analysis()
662 	if (taa_data->thread_irq_sum) {  in timerlat_thread_analysis()
663 		printf("  IRQ interference %.*s %9.2f us (%.2f %%)\n", 36, spaces,  in timerlat_thread_analysis()
664 		       ns_to_usf(taa_data->thread_irq_sum),  in timerlat_thread_analysis()
665 		       ns_to_per(total, taa_data->thread_irq_sum));  in timerlat_thread_analysis()
667 		trace_seq_do_printf(taa_data->irqs_seq);  in timerlat_thread_analysis()
673 	if (taa_data->thread_softirq_sum) {  in timerlat_thread_analysis()
674 		printf("  Softirq interference %.*s %9.2f us (%.2f %%)\n", 32, spaces,  in timerlat_thread_analysis()
675 		       ns_to_usf(taa_data->thread_softirq_sum),  in timerlat_thread_analysis()
676 		       ns_to_per(total, taa_data->thread_softirq_sum));  in timerlat_thread_analysis()
678 		trace_seq_do_printf(taa_data->softirqs_seq);  in timerlat_thread_analysis()
689 	if (taa_data->thread_thread_sum) {  in timerlat_thread_analysis()
690 		printf("  Thread interference %.*s %9.2f us (%.2f %%)\n", 33, spaces,  in timerlat_thread_analysis()
691 		       ns_to_usf(taa_data->thread_thread_sum),  in timerlat_thread_analysis()
692 		       ns_to_per(total, taa_data->thread_thread_sum));  in timerlat_thread_analysis()
694 		trace_seq_do_printf(taa_data->threads_seq);  in timerlat_thread_analysis()
701 	printf("------------------------------------------------------------------------\n");  in timerlat_thread_analysis()
702 	printf("  %s latency: %.*s %9.2f us (100%%)\n", irq ? "   IRQ" : "Thread",  in timerlat_thread_analysis()
708 	struct trace_instance *trace = &taa_ctx->tool->trace;  in timerlat_auto_analysis_collect_trace()
711 	retval = tracefs_iterate_raw_events(trace->tep,  in timerlat_auto_analysis_collect_trace()
712 					    trace->inst,  in timerlat_auto_analysis_collect_trace()
726  * timerlat_auto_analysis - Analyze the collected data
743 	for (cpu = 0; cpu < taa_ctx->nr_cpus; cpu++) {  in timerlat_auto_analysis()
746 		if (irq_thresh && taa_data->tlat_irq_latency >= irq_thresh) {  in timerlat_auto_analysis()
749 		} else if (thread_thresh && (taa_data->tlat_thread_latency) >= thread_thresh) {  in timerlat_auto_analysis()
754 		if (taa_data->max_exit_idle_latency > max_exit_from_idle) {  in timerlat_auto_analysis()
755 			max_exit_from_idle = taa_data->max_exit_idle_latency;  in timerlat_auto_analysis()
763 		printf("Max timerlat IRQ latency from idle: %.2f us in cpu %d\n",  in timerlat_auto_analysis()
766 	if (!taa_ctx->dump_tasks)  in timerlat_auto_analysis()
771 	for (cpu = 0; cpu < taa_ctx->nr_cpus; cpu++) {  in timerlat_auto_analysis()
773 		tep = taa_ctx->tool->trace.tep;  in timerlat_auto_analysis()
775 		printf("    [%.3d] %24s:%llu", cpu, taa_data->current_comm, taa_data->current_pid);  in timerlat_auto_analysis()
777 		if (taa_data->kworker_func)  in timerlat_auto_analysis()
779 				tep_find_function(tep, taa_data->kworker) ? : "<...>",  in timerlat_auto_analysis()
780 				tep_find_function(tep, taa_data->kworker_func));  in timerlat_auto_analysis()
787  * timerlat_aa_destroy_seqs - Destroy seq files used to store parsed data
794 	if (!taa_ctx->taa_data)  in timerlat_aa_destroy_seqs()
797 	for (i = 0; i < taa_ctx->nr_cpus; i++) {  in timerlat_aa_destroy_seqs()
800 		if (taa_data->prev_irqs_seq) {  in timerlat_aa_destroy_seqs()
801 			trace_seq_destroy(taa_data->prev_irqs_seq);  in timerlat_aa_destroy_seqs()
802 			free(taa_data->prev_irqs_seq);  in timerlat_aa_destroy_seqs()
805 		if (taa_data->nmi_seq) {  in timerlat_aa_destroy_seqs()
806 			trace_seq_destroy(taa_data->nmi_seq);  in timerlat_aa_destroy_seqs()
807 			free(taa_data->nmi_seq);  in timerlat_aa_destroy_seqs()
810 		if (taa_data->irqs_seq) {  in timerlat_aa_destroy_seqs()
811 			trace_seq_destroy(taa_data->irqs_seq);  in timerlat_aa_destroy_seqs()
812 			free(taa_data->irqs_seq);  in timerlat_aa_destroy_seqs()
815 		if (taa_data->softirqs_seq) {  in timerlat_aa_destroy_seqs()
816 			trace_seq_destroy(taa_data->softirqs_seq);  in timerlat_aa_destroy_seqs()
817 			free(taa_data->softirqs_seq);  in timerlat_aa_destroy_seqs()
820 		if (taa_data->threads_seq) {  in timerlat_aa_destroy_seqs()
821 			trace_seq_destroy(taa_data->threads_seq);  in timerlat_aa_destroy_seqs()
822 			free(taa_data->threads_seq);  in timerlat_aa_destroy_seqs()
825 		if (taa_data->stack_seq) {  in timerlat_aa_destroy_seqs()
826 			trace_seq_destroy(taa_data->stack_seq);  in timerlat_aa_destroy_seqs()
827 			free(taa_data->stack_seq);  in timerlat_aa_destroy_seqs()
833  * timerlat_aa_init_seqs - Init seq files used to store parsed information
840  * Returns 0 on success, -1 otherwise.
847 	for (i = 0; i < taa_ctx->nr_cpus; i++) {  in timerlat_aa_init_seqs()
851 		taa_data->prev_irqs_seq = calloc(1, sizeof(*taa_data->prev_irqs_seq));  in timerlat_aa_init_seqs()
852 		if (!taa_data->prev_irqs_seq)  in timerlat_aa_init_seqs()
855 		trace_seq_init(taa_data->prev_irqs_seq);  in timerlat_aa_init_seqs()
857 		taa_data->nmi_seq = calloc(1, sizeof(*taa_data->nmi_seq));  in timerlat_aa_init_seqs()
858 		if (!taa_data->nmi_seq)  in timerlat_aa_init_seqs()
861 		trace_seq_init(taa_data->nmi_seq);  in timerlat_aa_init_seqs()
863 		taa_data->irqs_seq = calloc(1, sizeof(*taa_data->irqs_seq));  in timerlat_aa_init_seqs()
864 		if (!taa_data->irqs_seq)  in timerlat_aa_init_seqs()
867 		trace_seq_init(taa_data->irqs_seq);  in timerlat_aa_init_seqs()
869 		taa_data->softirqs_seq = calloc(1, sizeof(*taa_data->softirqs_seq));  in timerlat_aa_init_seqs()
870 		if (!taa_data->softirqs_seq)  in timerlat_aa_init_seqs()
873 		trace_seq_init(taa_data->softirqs_seq);  in timerlat_aa_init_seqs()
875 		taa_data->threads_seq = calloc(1, sizeof(*taa_data->threads_seq));  in timerlat_aa_init_seqs()
876 		if (!taa_data->threads_seq)  in timerlat_aa_init_seqs()
879 		trace_seq_init(taa_data->threads_seq);  in timerlat_aa_init_seqs()
881 		taa_data->stack_seq = calloc(1, sizeof(*taa_data->stack_seq));  in timerlat_aa_init_seqs()
882 		if (!taa_data->stack_seq)  in timerlat_aa_init_seqs()
885 		trace_seq_init(taa_data->stack_seq);  in timerlat_aa_init_seqs()
892 	return -1;  in timerlat_aa_init_seqs()
896  * timerlat_aa_unregister_events - Unregister events used in the auto-analysis
901 	tep_unregister_event_handler(tool->trace.tep, -1, "ftrace", "timerlat",  in timerlat_aa_unregister_events()
904 	tracefs_event_disable(tool->trace.inst, "osnoise", NULL);  in timerlat_aa_unregister_events()
906 	tep_unregister_event_handler(tool->trace.tep, -1, "osnoise", "nmi_noise",  in timerlat_aa_unregister_events()
909 	tep_unregister_event_handler(tool->trace.tep, -1, "osnoise", "irq_noise",  in timerlat_aa_unregister_events()
912 	tep_unregister_event_handler(tool->trace.tep, -1, "osnoise", "softirq_noise",  in timerlat_aa_unregister_events()
915 	tep_unregister_event_handler(tool->trace.tep, -1, "osnoise", "thread_noise",  in timerlat_aa_unregister_events()
918 	tep_unregister_event_handler(tool->trace.tep, -1, "ftrace", "kernel_stack",  in timerlat_aa_unregister_events()
923 	tracefs_event_disable(tool->trace.inst, "sched", "sched_switch");  in timerlat_aa_unregister_events()
924 	tep_unregister_event_handler(tool->trace.tep, -1, "sched", "sched_switch",  in timerlat_aa_unregister_events()
927 	tracefs_event_disable(tool->trace.inst, "workqueue", "workqueue_execute_start");  in timerlat_aa_unregister_events()
928 	tep_unregister_event_handler(tool->trace.tep, -1, "workqueue", "workqueue_execute_start",  in timerlat_aa_unregister_events()
933  * timerlat_aa_register_events - Register events used in the auto-analysis
935  * Returns 0 on success, -1 otherwise.
941 	tep_register_event_handler(tool->trace.tep, -1, "ftrace", "timerlat",  in timerlat_aa_register_events()
946 	 * register auto-analysis handlers.  in timerlat_aa_register_events()
948 	retval = tracefs_event_enable(tool->trace.inst, "osnoise", NULL);  in timerlat_aa_register_events()
954 	tep_register_event_handler(tool->trace.tep, -1, "osnoise", "nmi_noise",  in timerlat_aa_register_events()
957 	tep_register_event_handler(tool->trace.tep, -1, "osnoise", "irq_noise",  in timerlat_aa_register_events()
960 	tep_register_event_handler(tool->trace.tep, -1, "osnoise", "softirq_noise",  in timerlat_aa_register_events()
963 	tep_register_event_handler(tool->trace.tep, -1, "osnoise", "thread_noise",  in timerlat_aa_register_events()
966 	tep_register_event_handler(tool->trace.tep, -1, "ftrace", "kernel_stack",  in timerlat_aa_register_events()
975 	retval = tracefs_event_enable(tool->trace.inst, "sched", "sched_switch");  in timerlat_aa_register_events()
981 	tep_register_event_handler(tool->trace.tep, -1, "sched", "sched_switch",  in timerlat_aa_register_events()
984 	retval = tracefs_event_enable(tool->trace.inst, "workqueue", "workqueue_execute_start");  in timerlat_aa_register_events()
990 	tep_register_event_handler(tool->trace.tep, -1, "workqueue", "workqueue_execute_start",  in timerlat_aa_register_events()
997 	return -1;  in timerlat_aa_register_events()
1001  * timerlat_aa_destroy - Destroy timerlat auto-analysis
1010 	if (!taa_ctx->taa_data)  in timerlat_aa_destroy()
1013 	timerlat_aa_unregister_events(taa_ctx->tool, taa_ctx->dump_tasks);  in timerlat_aa_destroy()
1015 	free(taa_ctx->taa_data);  in timerlat_aa_destroy()
1021  * timerlat_aa_init - Initialize timerlat auto-analysis
1023  * Returns 0 on success, -1 otherwise.
1033 		return -1;  in timerlat_aa_init()
1037 	taa_ctx->nr_cpus = nr_cpus;  in timerlat_aa_init()
1038 	taa_ctx->tool = tool;  in timerlat_aa_init()
1039 	taa_ctx->dump_tasks = dump_tasks;  in timerlat_aa_init()
1041 	taa_ctx->taa_data = calloc(nr_cpus, sizeof(*taa_ctx->taa_data));  in timerlat_aa_init()
1042 	if (!taa_ctx->taa_data)  in timerlat_aa_init()
1057 	return -1;  in timerlat_aa_init()