1 // SPDX-License-Identifier: GPL-2.0
20  * osnoise_get_cpus - return the original "osnoise/cpus" content
26 	if (context->curr_cpus)  in osnoise_get_cpus()
27 		return context->curr_cpus;  in osnoise_get_cpus()
29 	if (context->orig_cpus)  in osnoise_get_cpus()
30 		return context->orig_cpus;  in osnoise_get_cpus()
32 	context->orig_cpus = tracefs_instance_file_read(NULL, "osnoise/cpus", NULL);  in osnoise_get_cpus()
38 	return context->orig_cpus;  in osnoise_get_cpus()
42  * osnoise_set_cpus - configure osnoise to run on *cpus
44  * "osnoise/cpus" file is used to set the cpus in which osnoise/timerlat
46  * and set the cpus passed as argument.
55 		return -1;  in osnoise_set_cpus()
57 	context->curr_cpus = strdup(cpus);  in osnoise_set_cpus()
58 	if (!context->curr_cpus)  in osnoise_set_cpus()
59 		return -1;  in osnoise_set_cpus()
63 	debug_msg("setting cpus to %s from %s", cpus, context->orig_cpus);  in osnoise_set_cpus()
67 		free(context->curr_cpus);  in osnoise_set_cpus()
68 		context->curr_cpus = NULL;  in osnoise_set_cpus()
69 		return -1;  in osnoise_set_cpus()
76  * osnoise_restore_cpus - restore the original "osnoise/cpus"
86 	if (!context->orig_cpus)  in osnoise_restore_cpus()
89 	if (!context->curr_cpus)  in osnoise_restore_cpus()
93 	if (!strcmp(context->orig_cpus, context->curr_cpus))  in osnoise_restore_cpus()
96 	debug_msg("restoring cpus to %s", context->orig_cpus);  in osnoise_restore_cpus()
98 	retval = tracefs_instance_file_write(NULL, "osnoise/cpus", context->orig_cpus);  in osnoise_restore_cpus()
103 	free(context->curr_cpus);  in osnoise_restore_cpus()
104 	context->curr_cpus = NULL;  in osnoise_restore_cpus()
108  * osnoise_put_cpus - restore cpus config and cleanup data
114 	if (!context->orig_cpus)  in osnoise_put_cpus()
117 	free(context->orig_cpus);  in osnoise_put_cpus()
118 	context->orig_cpus = NULL;  in osnoise_put_cpus()
122  * osnoise_read_ll_config - read a long long value from a config
124  * returns -1 on error.
133 		return -1;  in osnoise_read_ll_config()
135 	/* get_llong_from_str returns -1 on error */  in osnoise_read_ll_config()
146  * osnoise_write_ll_config - write a long long value to a config in rel_path
148  * returns -1 on error.
164  * osnoise_get_runtime - return the original "osnoise/runtime_us" value
172 	if (context->runtime_us != OSNOISE_TIME_INIT_VAL)  in osnoise_get_runtime()
173 		return context->runtime_us;  in osnoise_get_runtime()
175 	if (context->orig_runtime_us != OSNOISE_TIME_INIT_VAL)  in osnoise_get_runtime()
176 		return context->orig_runtime_us;  in osnoise_get_runtime()
182 	context->orig_runtime_us = runtime_us;  in osnoise_get_runtime()
190  * osnoise_get_period - return the original "osnoise/period_us" value
198 	if (context->period_us != OSNOISE_TIME_INIT_VAL)  in osnoise_get_period()
199 		return context->period_us;  in osnoise_get_period()
201 	if (context->orig_period_us != OSNOISE_TIME_INIT_VAL)  in osnoise_get_period()
202 		return context->orig_period_us;  in osnoise_get_period()
208 	context->orig_period_us = period_us;  in osnoise_get_period()
220 	if (context->orig_runtime_us == OSNOISE_TIME_INIT_VAL)  in __osnoise_write_runtime()
221 		return -1;  in __osnoise_write_runtime()
225 		return -1;  in __osnoise_write_runtime()
227 	context->runtime_us = runtime;  in __osnoise_write_runtime()
236 	if (context->orig_period_us == OSNOISE_TIME_INIT_VAL)  in __osnoise_write_period()
237 		return -1;  in __osnoise_write_period()
241 		return -1;  in __osnoise_write_period()
243 	context->period_us = period;  in __osnoise_write_period()
248  * osnoise_set_runtime_period - set osnoise runtime and period
252  * to set the runtime and period if they are != 0.
270 		return -1;  in osnoise_set_runtime_period()
274 			return -1;  in osnoise_set_runtime_period()
278 			return -1;  in osnoise_set_runtime_period()
285 			return -1;  in osnoise_set_runtime_period()
288 			return -1;  in osnoise_set_runtime_period()
292 			return -1;  in osnoise_set_runtime_period()
295 			return -1;  in osnoise_set_runtime_period()
302  * osnoise_restore_runtime_period - restore the original runtime and period
306 	unsigned long long orig_runtime = context->orig_runtime_us;  in osnoise_restore_runtime_period()
307 	unsigned long long orig_period = context->orig_period_us;  in osnoise_restore_runtime_period()
308 	unsigned long long curr_runtime = context->runtime_us;  in osnoise_restore_runtime_period()
309 	unsigned long long curr_period = context->period_us;  in osnoise_restore_runtime_period()
323 	context->runtime_us = OSNOISE_TIME_INIT_VAL;  in osnoise_restore_runtime_period()
324 	context->period_us = OSNOISE_TIME_INIT_VAL;  in osnoise_restore_runtime_period()
328  * osnoise_put_runtime_period - restore original values and cleanup data
334 	if (context->orig_runtime_us != OSNOISE_TIME_INIT_VAL)  in osnoise_put_runtime_period()
335 		context->orig_runtime_us = OSNOISE_TIME_INIT_VAL;  in osnoise_put_runtime_period()
337 	if (context->orig_period_us != OSNOISE_TIME_INIT_VAL)  in osnoise_put_runtime_period()
338 		context->orig_period_us = OSNOISE_TIME_INIT_VAL;  in osnoise_put_runtime_period()
342  * osnoise_get_timerlat_period_us - read and save the original "timerlat_period_us"
349 	if (context->timerlat_period_us != OSNOISE_TIME_INIT_VAL)  in osnoise_get_timerlat_period_us()
350 		return context->timerlat_period_us;  in osnoise_get_timerlat_period_us()
352 	if (context->orig_timerlat_period_us != OSNOISE_TIME_INIT_VAL)  in osnoise_get_timerlat_period_us()
353 		return context->orig_timerlat_period_us;  in osnoise_get_timerlat_period_us()
359 	context->orig_timerlat_period_us = timerlat_period_us;  in osnoise_get_timerlat_period_us()
367  * osnoise_set_timerlat_period_us - set "timerlat_period_us"
375 		return -1;  in osnoise_set_timerlat_period_us()
379 		return -1;  in osnoise_set_timerlat_period_us()
381 	context->timerlat_period_us = timerlat_period_us;  in osnoise_set_timerlat_period_us()
387  * osnoise_restore_timerlat_period_us - restore "timerlat_period_us"
393 	if (context->orig_timerlat_period_us == OSNOISE_TIME_INIT_VAL)  in osnoise_restore_timerlat_period_us()
396 	if (context->orig_timerlat_period_us == context->timerlat_period_us)  in osnoise_restore_timerlat_period_us()
399 	retval = osnoise_write_ll_config("osnoise/timerlat_period_us", context->orig_timerlat_period_us);  in osnoise_restore_timerlat_period_us()
404 	context->timerlat_period_us = OSNOISE_TIME_INIT_VAL;  in osnoise_restore_timerlat_period_us()
408  * osnoise_put_timerlat_period_us - restore original values and cleanup data
414 	if (context->orig_timerlat_period_us == OSNOISE_TIME_INIT_VAL)  in osnoise_put_timerlat_period_us()
417 	context->orig_timerlat_period_us = OSNOISE_TIME_INIT_VAL;  in osnoise_put_timerlat_period_us()
421  * osnoise_get_stop_us - read and save the original "stop_tracing_us"
428 	if (context->stop_us != OSNOISE_OPTION_INIT_VAL)  in osnoise_get_stop_us()
429 		return context->stop_us;  in osnoise_get_stop_us()
431 	if (context->orig_stop_us != OSNOISE_OPTION_INIT_VAL)  in osnoise_get_stop_us()
432 		return context->orig_stop_us;  in osnoise_get_stop_us()
438 	context->orig_stop_us = stop_us;  in osnoise_get_stop_us()
446  * osnoise_set_stop_us - set "stop_tracing_us"
454 		return -1;  in osnoise_set_stop_us()
458 		return -1;  in osnoise_set_stop_us()
460 	context->stop_us = stop_us;  in osnoise_set_stop_us()
466  * osnoise_restore_stop_us - restore the original "stop_tracing_us"
472 	if (context->orig_stop_us == OSNOISE_OPTION_INIT_VAL)  in osnoise_restore_stop_us()
475 	if (context->orig_stop_us == context->stop_us)  in osnoise_restore_stop_us()
478 	retval = osnoise_write_ll_config("osnoise/stop_tracing_us", context->orig_stop_us);  in osnoise_restore_stop_us()
483 	context->stop_us = OSNOISE_OPTION_INIT_VAL;  in osnoise_restore_stop_us()
487  * osnoise_put_stop_us - restore original values and cleanup data
493 	if (context->orig_stop_us == OSNOISE_OPTION_INIT_VAL)  in osnoise_put_stop_us()
496 	context->orig_stop_us = OSNOISE_OPTION_INIT_VAL;  in osnoise_put_stop_us()
500  * osnoise_get_stop_total_us - read and save the original "stop_tracing_total_us"
507 	if (context->stop_total_us != OSNOISE_OPTION_INIT_VAL)  in osnoise_get_stop_total_us()
508 		return context->stop_total_us;  in osnoise_get_stop_total_us()
510 	if (context->orig_stop_total_us != OSNOISE_OPTION_INIT_VAL)  in osnoise_get_stop_total_us()
511 		return context->orig_stop_total_us;  in osnoise_get_stop_total_us()
517 	context->orig_stop_total_us = stop_total_us;  in osnoise_get_stop_total_us()
525  * osnoise_set_stop_total_us - set "stop_tracing_total_us"
533 		return -1;  in osnoise_set_stop_total_us()
537 		return -1;  in osnoise_set_stop_total_us()
539 	context->stop_total_us = stop_total_us;  in osnoise_set_stop_total_us()
545  * osnoise_restore_stop_total_us - restore the original "stop_tracing_total_us"
551 	if (context->orig_stop_total_us == OSNOISE_OPTION_INIT_VAL)  in osnoise_restore_stop_total_us()
554 	if (context->orig_stop_total_us == context->stop_total_us)  in osnoise_restore_stop_total_us()
558 			context->orig_stop_total_us);  in osnoise_restore_stop_total_us()
563 	context->stop_total_us = OSNOISE_OPTION_INIT_VAL;  in osnoise_restore_stop_total_us()
567  * osnoise_put_stop_total_us - restore original values and cleanup data
573 	if (context->orig_stop_total_us == OSNOISE_OPTION_INIT_VAL)  in osnoise_put_stop_total_us()
576 	context->orig_stop_total_us = OSNOISE_OPTION_INIT_VAL;  in osnoise_put_stop_total_us()
580  * osnoise_get_print_stack - read and save the original "print_stack"
587 	if (context->print_stack != OSNOISE_OPTION_INIT_VAL)  in osnoise_get_print_stack()
588 		return context->print_stack;  in osnoise_get_print_stack()
590 	if (context->orig_print_stack != OSNOISE_OPTION_INIT_VAL)  in osnoise_get_print_stack()
591 		return context->orig_print_stack;  in osnoise_get_print_stack()
597 	context->orig_print_stack = print_stack;  in osnoise_get_print_stack()
605  * osnoise_set_print_stack - set "print_stack"
613 		return -1;  in osnoise_set_print_stack()
617 		return -1;  in osnoise_set_print_stack()
619 	context->print_stack = print_stack;  in osnoise_set_print_stack()
625  * osnoise_restore_print_stack - restore the original "print_stack"
631 	if (context->orig_print_stack == OSNOISE_OPTION_INIT_VAL)  in osnoise_restore_print_stack()
634 	if (context->orig_print_stack == context->print_stack)  in osnoise_restore_print_stack()
637 	retval = osnoise_write_ll_config("osnoise/print_stack", context->orig_print_stack);  in osnoise_restore_print_stack()
642 	context->print_stack = OSNOISE_OPTION_INIT_VAL;  in osnoise_restore_print_stack()
646  * osnoise_put_print_stack - restore original values and cleanup data
652 	if (context->orig_print_stack == OSNOISE_OPTION_INIT_VAL)  in osnoise_put_print_stack()
655 	context->orig_print_stack = OSNOISE_OPTION_INIT_VAL;  in osnoise_put_print_stack()
659  * osnoise_get_tracing_thresh - read and save the original "tracing_thresh"
666 	if (context->tracing_thresh != OSNOISE_OPTION_INIT_VAL)  in osnoise_get_tracing_thresh()
667 		return context->tracing_thresh;  in osnoise_get_tracing_thresh()
669 	if (context->orig_tracing_thresh != OSNOISE_OPTION_INIT_VAL)  in osnoise_get_tracing_thresh()
670 		return context->orig_tracing_thresh;  in osnoise_get_tracing_thresh()
676 	context->orig_tracing_thresh = tracing_thresh;  in osnoise_get_tracing_thresh()
684  * osnoise_set_tracing_thresh - set "tracing_thresh"
692 		return -1;  in osnoise_set_tracing_thresh()
696 		return -1;  in osnoise_set_tracing_thresh()
698 	context->tracing_thresh = tracing_thresh;  in osnoise_set_tracing_thresh()
704  * osnoise_restore_tracing_thresh - restore the original "tracing_thresh"
710 	if (context->orig_tracing_thresh == OSNOISE_OPTION_INIT_VAL)  in osnoise_restore_tracing_thresh()
713 	if (context->orig_tracing_thresh == context->tracing_thresh)  in osnoise_restore_tracing_thresh()
716 	retval = osnoise_write_ll_config("tracing_thresh", context->orig_tracing_thresh);  in osnoise_restore_tracing_thresh()
721 	context->tracing_thresh = OSNOISE_OPTION_INIT_VAL;  in osnoise_restore_tracing_thresh()
725  * osnoise_put_tracing_thresh - restore original values and cleanup data
731 	if (context->orig_tracing_thresh == OSNOISE_OPTION_INIT_VAL)  in osnoise_put_tracing_thresh()
734 	context->orig_tracing_thresh = OSNOISE_OPTION_INIT_VAL;  in osnoise_put_tracing_thresh()
785 	if (context->opt_irq_disable != OSNOISE_OPTION_INIT_VAL)  in osnoise_get_irq_disable()
786 		return context->opt_irq_disable;  in osnoise_get_irq_disable()
788 	if (context->orig_opt_irq_disable != OSNOISE_OPTION_INIT_VAL)  in osnoise_get_irq_disable()
789 		return context->orig_opt_irq_disable;  in osnoise_get_irq_disable()
791 	context->orig_opt_irq_disable = osnoise_options_get_option("OSNOISE_IRQ_DISABLE");  in osnoise_get_irq_disable()
793 	return context->orig_opt_irq_disable;  in osnoise_get_irq_disable()
802 		return -1;  in osnoise_set_irq_disable()
809 		return -1;  in osnoise_set_irq_disable()
811 	context->opt_irq_disable = onoff;  in osnoise_set_irq_disable()
820 	if (context->orig_opt_irq_disable == OSNOISE_OPTION_INIT_VAL)  in osnoise_restore_irq_disable()
823 	if (context->orig_opt_irq_disable == context->opt_irq_disable)  in osnoise_restore_irq_disable()
826 	retval = osnoise_options_set_option("OSNOISE_IRQ_DISABLE", context->orig_opt_irq_disable);  in osnoise_restore_irq_disable()
831 	context->orig_opt_irq_disable = OSNOISE_OPTION_INIT_VAL;  in osnoise_restore_irq_disable()
838 	if (context->orig_opt_irq_disable == OSNOISE_OPTION_INIT_VAL)  in osnoise_put_irq_disable()
841 	context->orig_opt_irq_disable = OSNOISE_OPTION_INIT_VAL;  in osnoise_put_irq_disable()
846 	if (context->opt_workload != OSNOISE_OPTION_INIT_VAL)  in osnoise_get_workload()
847 		return context->opt_workload;  in osnoise_get_workload()
849 	if (context->orig_opt_workload != OSNOISE_OPTION_INIT_VAL)  in osnoise_get_workload()
850 		return context->orig_opt_workload;  in osnoise_get_workload()
852 	context->orig_opt_workload = osnoise_options_get_option("OSNOISE_WORKLOAD");  in osnoise_get_workload()
854 	return context->orig_opt_workload;  in osnoise_get_workload()
863 		return -1;  in osnoise_set_workload()
870 		return -1;  in osnoise_set_workload()
872 	context->opt_workload = onoff;  in osnoise_set_workload()
881 	if (context->orig_opt_workload == OSNOISE_OPTION_INIT_VAL)  in osnoise_restore_workload()
884 	if (context->orig_opt_workload == context->opt_workload)  in osnoise_restore_workload()
887 	retval = osnoise_options_set_option("OSNOISE_WORKLOAD", context->orig_opt_workload);  in osnoise_restore_workload()
892 	context->orig_opt_workload = OSNOISE_OPTION_INIT_VAL;  in osnoise_restore_workload()
899 	if (context->orig_opt_workload == OSNOISE_OPTION_INIT_VAL)  in osnoise_put_workload()
902 	context->orig_opt_workload = OSNOISE_OPTION_INIT_VAL;  in osnoise_put_workload()
906  * enable_osnoise - enable osnoise tracer in the trace_instance
910 	return enable_tracer_by_name(trace->inst, "osnoise");  in enable_osnoise()
914  * enable_timerlat - enable timerlat tracer in the trace_instance
918 	return enable_tracer_by_name(trace->inst, "timerlat");  in enable_timerlat()
927  * osnoise_get_context - increase the usage of a context and return it
933 	if (context->flags & FLAG_CONTEXT_DELETED) {  in osnoise_get_context()
934 		ret = -1;  in osnoise_get_context()
936 		context->ref++;  in osnoise_get_context()
944  * osnoise_context_alloc - alloc an osnoise_context
947  * It is used to set and restore the config.
957 	context->orig_stop_us		= OSNOISE_OPTION_INIT_VAL;  in osnoise_context_alloc()
958 	context->stop_us		= OSNOISE_OPTION_INIT_VAL;  in osnoise_context_alloc()
960 	context->orig_stop_total_us	= OSNOISE_OPTION_INIT_VAL;  in osnoise_context_alloc()
961 	context->stop_total_us		= OSNOISE_OPTION_INIT_VAL;  in osnoise_context_alloc()
963 	context->orig_print_stack	= OSNOISE_OPTION_INIT_VAL;  in osnoise_context_alloc()
964 	context->print_stack		= OSNOISE_OPTION_INIT_VAL;  in osnoise_context_alloc()
966 	context->orig_tracing_thresh	= OSNOISE_OPTION_INIT_VAL;  in osnoise_context_alloc()
967 	context->tracing_thresh		= OSNOISE_OPTION_INIT_VAL;  in osnoise_context_alloc()
969 	context->orig_opt_irq_disable	= OSNOISE_OPTION_INIT_VAL;  in osnoise_context_alloc()
970 	context->opt_irq_disable	= OSNOISE_OPTION_INIT_VAL;  in osnoise_context_alloc()
972 	context->orig_opt_workload	= OSNOISE_OPTION_INIT_VAL;  in osnoise_context_alloc()
973 	context->opt_workload		= OSNOISE_OPTION_INIT_VAL;  in osnoise_context_alloc()
981  * osnoise_put_context - put the osnoise_put_context
988 	if (--context->ref < 1)  in osnoise_put_context()
989 		context->flags |= FLAG_CONTEXT_DELETED;  in osnoise_put_context()
991 	if (!(context->flags & FLAG_CONTEXT_DELETED))  in osnoise_put_context()
1008  * osnoise_destroy_tool - disable trace, restore configs and free data
1010 void osnoise_destroy_tool(struct osnoise_tool *top)  in osnoise_destroy_tool()  argument
1012 	if (!top)  in osnoise_destroy_tool()
1015 	trace_instance_destroy(&top->trace);  in osnoise_destroy_tool()
1017 	if (top->context)  in osnoise_destroy_tool()
1018 		osnoise_put_context(top->context);  in osnoise_destroy_tool()
1020 	free(top);  in osnoise_destroy_tool()
1024  * osnoise_init_tool - init an osnoise tool
1031 	struct osnoise_tool *top;  in osnoise_init_tool()  local
1034 	top = calloc(1, sizeof(*top));  in osnoise_init_tool()
1035 	if (!top)  in osnoise_init_tool()
1038 	top->context = osnoise_context_alloc();  in osnoise_init_tool()
1039 	if (!top->context)  in osnoise_init_tool()
1042 	retval = trace_instance_init(&top->trace, tool_name);  in osnoise_init_tool()
1046 	return top;  in osnoise_init_tool()
1048 	osnoise_destroy_tool(top);  in osnoise_init_tool()
1053  * osnoise_init_trace_tool - init a tracer instance to trace osnoise events
1064 	retval = tracefs_event_enable(trace->trace.inst, "osnoise", NULL);  in osnoise_init_trace_tool()
1070 	retval = enable_tracer_by_name(trace->trace.inst, tracer);  in osnoise_init_trace_tool()
1093 		"     top   - prints the summary from osnoise tracer",  in osnoise_usage()
1094 		"     hist  - prints a histogram of osnoise samples",  in osnoise_usage()
1096 		"if no MODE is given, the top mode is called, passing the arguments",  in osnoise_usage()
1119 	if ((strcmp(argv[1], "-h") == 0) || (strcmp(argv[1], "--help") == 0)) {  in osnoise_main()
1121 	} else if (strncmp(argv[1], "-", 1) == 0) {  in osnoise_main()
1125 	} else if (strcmp(argv[1], "top") == 0) {  in osnoise_main()
1126 		osnoise_top_main(argc-1, &argv[1]);  in osnoise_main()
1129 		osnoise_hist_main(argc-1, &argv[1]);  in osnoise_main()