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path: root/tools/tracing/rtla/src/timerlat_top.c
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Diffstat (limited to 'tools/tracing/rtla/src/timerlat_top.c')
-rw-r--r--tools/tracing/rtla/src/timerlat_top.c116
1 files changed, 39 insertions, 77 deletions
diff --git a/tools/tracing/rtla/src/timerlat_top.c b/tools/tracing/rtla/src/timerlat_top.c
index fc479a0dcb59..29c2c1f717ed 100644
--- a/tools/tracing/rtla/src/timerlat_top.c
+++ b/tools/tracing/rtla/src/timerlat_top.c
@@ -459,9 +459,7 @@ timerlat_print_stats(struct osnoise_tool *top)
timerlat_top_header(params, top);
- for (i = 0; i < nr_cpus; i++) {
- if (params->common.cpus && !CPU_ISSET(i, &params->common.monitored_cpus))
- continue;
+ for_each_monitored_cpu(i, nr_cpus, &params->common) {
timerlat_top_print(top, i);
timerlat_top_update_sum(top, i, &summary);
}
@@ -476,15 +474,15 @@ timerlat_print_stats(struct osnoise_tool *top)
/*
* timerlat_top_usage - prints timerlat top usage message
*/
-static void timerlat_top_usage(char *usage)
+static void timerlat_top_usage(void)
{
int i;
static const char *const msg[] = {
"",
" usage: rtla timerlat [top] [-h] [-q] [-a us] [-d s] [-D] [-n] [-p us] [-i us] [-T us] [-s us] \\",
- " [[-t[file]] [-e sys[:event]] [--filter <filter>] [--trigger <trigger>] [-c cpu-list] [-H cpu-list]\\",
- " [-P priority] [--dma-latency us] [--aa-only us] [-C[=cgroup_name]] [-u|-k] [--warm-up s] [--deepest-idle-state n]",
+ " [[-t [file]] [-e sys[:event]] [--filter <filter>] [--trigger <trigger>] [-c cpu-list] [-H cpu-list]\\",
+ " [-P priority] [--dma-latency us] [--aa-only us] [-C [cgroup_name]] [-u|-k] [--warm-up s] [--deepest-idle-state n]",
"",
" -h/--help: print this menu",
" -a/--auto: set automatic trace mode, stopping the session if argument in us latency is hit",
@@ -495,11 +493,11 @@ static void timerlat_top_usage(char *usage)
" -s/--stack us: save the stack trace at the IRQ if a thread latency is higher than the argument in us",
" -c/--cpus cpus: run the tracer only on the given cpus",
" -H/--house-keeping cpus: run rtla control threads only on the given cpus",
- " -C/--cgroup[=cgroup_name]: set cgroup, if no cgroup_name is passed, the rtla's cgroup will be inherited",
+ " -C/--cgroup [cgroup_name]: set cgroup, if no cgroup_name is passed, the rtla's cgroup will be inherited",
" -d/--duration time[s|m|h|d]: duration of the session",
" -D/--debug: print debug info",
" --dump-tasks: prints the task running on all CPUs if stop conditions are met (depends on !--no-aa)",
- " -t/--trace[file]: save the stopped trace to [file|timerlat_trace.txt]",
+ " -t/--trace [file]: save the stopped trace to [file|timerlat_trace.txt]",
" -e/--event <sys:event>: enable the <sys:event> in the trace instance, multiple -e are allowed",
" --filter <command>: enable a trace event filter to the previous -e event",
" --trigger <command>: enable a trace event trigger to the previous -e event",
@@ -524,18 +522,12 @@ static void timerlat_top_usage(char *usage)
NULL,
};
- if (usage)
- fprintf(stderr, "%s\n", usage);
-
fprintf(stderr, "rtla timerlat top: a per-cpu summary of the timer latency (version %s)\n",
VERSION);
for (i = 0; msg[i]; i++)
fprintf(stderr, "%s\n", msg[i]);
- if (usage)
- exit(EXIT_FAILURE);
-
exit(EXIT_SUCCESS);
}
@@ -606,11 +598,8 @@ static struct common_params
{0, 0, 0, 0}
};
- /* getopt_long stores the option index here. */
- int option_index = 0;
-
c = getopt_long(argc, argv, "a:c:C::d:De:hH:i:knp:P:qs:t::T:uU0:1:2:345:6:7:",
- long_options, &option_index);
+ long_options, NULL);
/* detect the end of the options. */
if (c == -1)
@@ -628,7 +617,8 @@ static struct common_params
params->print_stack = auto_thresh;
/* set trace */
- trace_output = "timerlat_trace.txt";
+ if (!trace_output)
+ trace_output = "timerlat_trace.txt";
break;
case '5':
@@ -648,18 +638,12 @@ static struct common_params
case 'c':
retval = parse_cpu_set(optarg, &params->common.monitored_cpus);
if (retval)
- timerlat_top_usage("\nInvalid -c cpu list\n");
+ fatal("Invalid -c cpu list");
params->common.cpus = optarg;
break;
case 'C':
params->common.cgroup = 1;
- if (!optarg) {
- /* will inherit this cgroup */
- params->common.cgroup_name = NULL;
- } else if (*optarg == '=') {
- /* skip the = */
- params->common.cgroup_name = ++optarg;
- }
+ params->common.cgroup_name = optarg;
break;
case 'D':
config_debug = 1;
@@ -667,14 +651,12 @@ static struct common_params
case 'd':
params->common.duration = parse_seconds_duration(optarg);
if (!params->common.duration)
- timerlat_top_usage("Invalid -d duration\n");
+ fatal("Invalid -d duration");
break;
case 'e':
tevent = trace_event_alloc(optarg);
- if (!tevent) {
- err_msg("Error alloc trace event");
- exit(EXIT_FAILURE);
- }
+ if (!tevent)
+ fatal("Error alloc trace event");
if (params->common.events)
tevent->next = params->common.events;
@@ -682,15 +664,13 @@ static struct common_params
break;
case 'h':
case '?':
- timerlat_top_usage(NULL);
+ timerlat_top_usage();
break;
case 'H':
params->common.hk_cpus = 1;
retval = parse_cpu_set(optarg, &params->common.hk_cpu_set);
- if (retval) {
- err_msg("Error parsing house keeping CPUs\n");
- exit(EXIT_FAILURE);
- }
+ if (retval)
+ fatal("Error parsing house keeping CPUs");
break;
case 'i':
params->common.stop_us = get_llong_from_str(optarg);
@@ -704,12 +684,12 @@ static struct common_params
case 'p':
params->timerlat_period_us = get_llong_from_str(optarg);
if (params->timerlat_period_us > 1000000)
- timerlat_top_usage("Period longer than 1 s\n");
+ fatal("Period longer than 1 s");
break;
case 'P':
retval = parse_prio(optarg, &params->common.sched_param);
if (retval == -1)
- timerlat_top_usage("Invalid -P priority");
+ fatal("Invalid -P priority");
params->common.set_sched = 1;
break;
case 'q':
@@ -722,14 +702,8 @@ static struct common_params
params->common.stop_total_us = get_llong_from_str(optarg);
break;
case 't':
- if (optarg) {
- if (optarg[0] == '=')
- trace_output = &optarg[1];
- else
- trace_output = &optarg[0];
- } else if (optind < argc && argv[optind][0] != '-')
- trace_output = argv[optind];
- else
+ trace_output = parse_optional_arg(argc, argv);
+ if (!trace_output)
trace_output = "timerlat_trace.txt";
break;
case 'u':
@@ -741,31 +715,25 @@ static struct common_params
case '0': /* trigger */
if (params->common.events) {
retval = trace_event_add_trigger(params->common.events, optarg);
- if (retval) {
- err_msg("Error adding trigger %s\n", optarg);
- exit(EXIT_FAILURE);
- }
+ if (retval)
+ fatal("Error adding trigger %s", optarg);
} else {
- timerlat_top_usage("--trigger requires a previous -e\n");
+ fatal("--trigger requires a previous -e");
}
break;
case '1': /* filter */
if (params->common.events) {
retval = trace_event_add_filter(params->common.events, optarg);
- if (retval) {
- err_msg("Error adding filter %s\n", optarg);
- exit(EXIT_FAILURE);
- }
+ if (retval)
+ fatal("Error adding filter %s", optarg);
} else {
- timerlat_top_usage("--filter requires a previous -e\n");
+ fatal("--filter requires a previous -e");
}
break;
case '2': /* dma-latency */
params->dma_latency = get_llong_from_str(optarg);
- if (params->dma_latency < 0 || params->dma_latency > 10000) {
- err_msg("--dma-latency needs to be >= 0 and < 10000");
- exit(EXIT_FAILURE);
- }
+ if (params->dma_latency < 0 || params->dma_latency > 10000)
+ fatal("--dma-latency needs to be >= 0 and < 10000");
break;
case '3': /* no-aa */
params->no_aa = 1;
@@ -785,31 +753,25 @@ static struct common_params
case '9':
retval = actions_parse(&params->common.threshold_actions, optarg,
"timerlat_trace.txt");
- if (retval) {
- err_msg("Invalid action %s\n", optarg);
- exit(EXIT_FAILURE);
- }
+ if (retval)
+ fatal("Invalid action %s", optarg);
break;
case '\1':
retval = actions_parse(&params->common.end_actions, optarg,
"timerlat_trace.txt");
- if (retval) {
- err_msg("Invalid action %s\n", optarg);
- exit(EXIT_FAILURE);
- }
+ if (retval)
+ fatal("Invalid action %s", optarg);
break;
default:
- timerlat_top_usage("Invalid option");
+ fatal("Invalid option");
}
}
if (trace_output)
actions_add_trace_output(&params->common.threshold_actions, trace_output);
- if (geteuid()) {
- err_msg("rtla needs root permission\n");
- exit(EXIT_FAILURE);
- }
+ if (geteuid())
+ fatal("rtla needs root permission");
/*
* Auto analysis only happens if stop tracing, thus:
@@ -818,10 +780,10 @@ static struct common_params
params->no_aa = 1;
if (params->no_aa && params->common.aa_only)
- timerlat_top_usage("--no-aa and --aa-only are mutually exclusive!");
+ fatal("--no-aa and --aa-only are mutually exclusive!");
if (params->common.kernel_workload && params->common.user_workload)
- timerlat_top_usage("--kernel-threads and --user-threads are mutually exclusive!");
+ fatal("--kernel-threads and --user-threads are mutually exclusive!");
/*
* If auto-analysis or trace output is enabled, switch from BPF mode to
@@ -916,7 +878,7 @@ timerlat_top_bpf_main_loop(struct osnoise_tool *tool)
if (!params->common.quiet)
timerlat_print_stats(tool);
- if (wait_retval == 1) {
+ if (wait_retval != 0) {
/* Stopping requested by tracer */
actions_perform(&params->common.threshold_actions);
generated by cgit v1.2.3 (git 2.46.0) at 2025-12-06 06:45:14 +0000