diff options
Diffstat (limited to 'tools/tracing/rtla/src/osnoise_hist.c')
| -rw-r--r-- | tools/tracing/rtla/src/osnoise_hist.c | 574 |
1 files changed, 170 insertions, 404 deletions
diff --git a/tools/tracing/rtla/src/osnoise_hist.c b/tools/tracing/rtla/src/osnoise_hist.c index 7be17d09f7e8..ff8c231e47c4 100644 --- a/tools/tracing/rtla/src/osnoise_hist.c +++ b/tools/tracing/rtla/src/osnoise_hist.c @@ -12,40 +12,9 @@ #include <errno.h> #include <stdio.h> #include <time.h> -#include <sched.h> -#include "utils.h" #include "osnoise.h" -struct osnoise_hist_params { - char *cpus; - cpu_set_t monitored_cpus; - char *trace_output; - char *cgroup_name; - unsigned long long runtime; - unsigned long long period; - long long threshold; - long long stop_us; - long long stop_total_us; - int sleep_time; - int duration; - int set_sched; - int output_divisor; - int cgroup; - int hk_cpus; - cpu_set_t hk_cpu_set; - struct sched_attr sched_param; - struct trace_events *events; - char no_header; - char no_summary; - char no_index; - char with_zeros; - int bucket_size; - int entries; - int warmup; - int buffer_size; -}; - struct osnoise_hist_cpu { int *samples; int count; @@ -85,6 +54,11 @@ osnoise_free_histogram(struct osnoise_hist_data *data) free(data); } +static void osnoise_free_hist_tool(struct osnoise_tool *tool) +{ + osnoise_free_histogram(tool->data); +} + /* * osnoise_alloc_histogram - alloc runtime data */ @@ -126,15 +100,15 @@ cleanup: static void osnoise_hist_update_multiple(struct osnoise_tool *tool, int cpu, unsigned long long duration, int count) { - struct osnoise_hist_params *params = tool->params; + struct osnoise_params *params = to_osnoise_params(tool->params); struct osnoise_hist_data *data = tool->data; unsigned long long total_duration; int entries = data->entries; int bucket; int *hist; - if (params->output_divisor) - duration = duration / params->output_divisor; + if (params->common.output_divisor) + duration = duration / params->common.output_divisor; bucket = duration / data->bucket_size; @@ -168,7 +142,7 @@ static void osnoise_destroy_trace_hist(struct osnoise_tool *tool) */ static int osnoise_init_trace_hist(struct osnoise_tool *tool) { - struct osnoise_hist_params *params = tool->params; + struct osnoise_params *params = to_osnoise_params(tool->params); struct osnoise_hist_data *data = tool->data; int bucket_size; char buff[128]; @@ -177,7 +151,7 @@ static int osnoise_init_trace_hist(struct osnoise_tool *tool) /* * Set the size of the bucket. */ - bucket_size = params->output_divisor * params->bucket_size; + bucket_size = params->common.output_divisor * params->common.hist.bucket_size; snprintf(buff, sizeof(buff), "duration.buckets=%d", bucket_size); data->trace_hist = tracefs_hist_alloc(tool->trace.tep, "osnoise", "sample_threshold", @@ -253,29 +227,27 @@ static void osnoise_read_trace_hist(struct osnoise_tool *tool) */ static void osnoise_hist_header(struct osnoise_tool *tool) { - struct osnoise_hist_params *params = tool->params; + struct osnoise_params *params = to_osnoise_params(tool->params); struct osnoise_hist_data *data = tool->data; struct trace_seq *s = tool->trace.seq; char duration[26]; int cpu; - if (params->no_header) + if (params->common.hist.no_header) return; get_duration(tool->start_time, duration, sizeof(duration)); trace_seq_printf(s, "# RTLA osnoise histogram\n"); trace_seq_printf(s, "# Time unit is %s (%s)\n", - params->output_divisor == 1 ? "nanoseconds" : "microseconds", - params->output_divisor == 1 ? "ns" : "us"); + params->common.output_divisor == 1 ? "nanoseconds" : "microseconds", + params->common.output_divisor == 1 ? "ns" : "us"); trace_seq_printf(s, "# Duration: %s\n", duration); - if (!params->no_index) + if (!params->common.hist.no_index) trace_seq_printf(s, "Index"); - for (cpu = 0; cpu < data->nr_cpus; cpu++) { - if (params->cpus && !CPU_ISSET(cpu, ¶ms->monitored_cpus)) - continue; + for_each_monitored_cpu(cpu, data->nr_cpus, ¶ms->common) { if (!data->hist[cpu].count) continue; @@ -292,21 +264,19 @@ static void osnoise_hist_header(struct osnoise_tool *tool) * osnoise_print_summary - print the summary of the hist data to the output */ static void -osnoise_print_summary(struct osnoise_hist_params *params, +osnoise_print_summary(struct osnoise_params *params, struct trace_instance *trace, struct osnoise_hist_data *data) { int cpu; - if (params->no_summary) + if (params->common.hist.no_summary) return; - if (!params->no_index) + if (!params->common.hist.no_index) trace_seq_printf(trace->seq, "count:"); - for (cpu = 0; cpu < data->nr_cpus; cpu++) { - if (params->cpus && !CPU_ISSET(cpu, ¶ms->monitored_cpus)) - continue; + for_each_monitored_cpu(cpu, data->nr_cpus, ¶ms->common) { if (!data->hist[cpu].count) continue; @@ -315,12 +285,10 @@ osnoise_print_summary(struct osnoise_hist_params *params, } trace_seq_printf(trace->seq, "\n"); - if (!params->no_index) + if (!params->common.hist.no_index) trace_seq_printf(trace->seq, "min: "); - for (cpu = 0; cpu < data->nr_cpus; cpu++) { - if (params->cpus && !CPU_ISSET(cpu, ¶ms->monitored_cpus)) - continue; + for_each_monitored_cpu(cpu, data->nr_cpus, ¶ms->common) { if (!data->hist[cpu].count) continue; @@ -330,12 +298,10 @@ osnoise_print_summary(struct osnoise_hist_params *params, } trace_seq_printf(trace->seq, "\n"); - if (!params->no_index) + if (!params->common.hist.no_index) trace_seq_printf(trace->seq, "avg: "); - for (cpu = 0; cpu < data->nr_cpus; cpu++) { - if (params->cpus && !CPU_ISSET(cpu, ¶ms->monitored_cpus)) - continue; + for_each_monitored_cpu(cpu, data->nr_cpus, ¶ms->common) { if (!data->hist[cpu].count) continue; @@ -348,12 +314,10 @@ osnoise_print_summary(struct osnoise_hist_params *params, } trace_seq_printf(trace->seq, "\n"); - if (!params->no_index) + if (!params->common.hist.no_index) trace_seq_printf(trace->seq, "max: "); - for (cpu = 0; cpu < data->nr_cpus; cpu++) { - if (params->cpus && !CPU_ISSET(cpu, ¶ms->monitored_cpus)) - continue; + for_each_monitored_cpu(cpu, data->nr_cpus, ¶ms->common) { if (!data->hist[cpu].count) continue; @@ -370,10 +334,12 @@ osnoise_print_summary(struct osnoise_hist_params *params, * osnoise_print_stats - print data for all CPUs */ static void -osnoise_print_stats(struct osnoise_hist_params *params, struct osnoise_tool *tool) +osnoise_print_stats(struct osnoise_tool *tool) { + struct osnoise_params *params = to_osnoise_params(tool->params); struct osnoise_hist_data *data = tool->data; struct trace_instance *trace = &tool->trace; + int has_samples = 0; int bucket, cpu; int total; @@ -382,13 +348,11 @@ osnoise_print_stats(struct osnoise_hist_params *params, struct osnoise_tool *too for (bucket = 0; bucket < data->entries; bucket++) { total = 0; - if (!params->no_index) + if (!params->common.hist.no_index) trace_seq_printf(trace->seq, "%-6d", bucket * data->bucket_size); - for (cpu = 0; cpu < data->nr_cpus; cpu++) { - if (params->cpus && !CPU_ISSET(cpu, ¶ms->monitored_cpus)) - continue; + for_each_monitored_cpu(cpu, data->nr_cpus, ¶ms->common) { if (!data->hist[cpu].count) continue; @@ -397,22 +361,34 @@ osnoise_print_stats(struct osnoise_hist_params *params, struct osnoise_tool *too trace_seq_printf(trace->seq, "%9d ", data->hist[cpu].samples[bucket]); } - if (total == 0 && !params->with_zeros) { + if (total == 0 && !params->common.hist.with_zeros) { trace_seq_reset(trace->seq); continue; } + /* There are samples above the threshold */ + has_samples = 1; trace_seq_printf(trace->seq, "\n"); trace_seq_do_printf(trace->seq); trace_seq_reset(trace->seq); } - if (!params->no_index) + /* + * If no samples were recorded, skip calculations, print zeroed statistics + * and return. + */ + if (!has_samples) { + trace_seq_reset(trace->seq); + trace_seq_printf(trace->seq, "over: 0\ncount: 0\nmin: 0\navg: 0\nmax: 0\n"); + trace_seq_do_printf(trace->seq); + trace_seq_reset(trace->seq); + return; + } + + if (!params->common.hist.no_index) trace_seq_printf(trace->seq, "over: "); - for (cpu = 0; cpu < data->nr_cpus; cpu++) { - if (params->cpus && !CPU_ISSET(cpu, ¶ms->monitored_cpus)) - continue; + for_each_monitored_cpu(cpu, data->nr_cpus, ¶ms->common) { if (!data->hist[cpu].count) continue; @@ -425,21 +401,22 @@ osnoise_print_stats(struct osnoise_hist_params *params, struct osnoise_tool *too trace_seq_reset(trace->seq); osnoise_print_summary(params, trace, data); + osnoise_report_missed_events(tool); } /* * osnoise_hist_usage - prints osnoise hist usage message */ -static void osnoise_hist_usage(char *usage) +static void osnoise_hist_usage(void) { int i; static const char * const msg[] = { "", " usage: rtla osnoise hist [-h] [-D] [-d s] [-a us] [-p us] [-r us] [-s us] [-S us] \\", - " [-T us] [-t[file]] [-e sys[:event]] [--filter <filter>] [--trigger <trigger>] \\", + " [-T us] [-t [file]] [-e sys[:event]] [--filter <filter>] [--trigger <trigger>] \\", " [-c cpu-list] [-H cpu-list] [-P priority] [-b N] [-E N] [--no-header] [--no-summary] \\", - " [--no-index] [--with-zeros] [-C[=cgroup_name]] [--warm-up]", + " [--no-index] [--with-zeros] [-C [cgroup_name]] [--warm-up]", "", " -h/--help: print this menu", " -a/--auto: set automatic trace mode, stopping the session if argument in us sample is hit", @@ -450,10 +427,10 @@ static void osnoise_hist_usage(char *usage) " -T/--threshold us: the minimum delta to be considered a noise", " -c/--cpus cpu-list: list of cpus to run osnoise threads", " -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", - " -t/--trace[file]: save the stopped trace to [file|osnoise_trace.txt]", + " -t/--trace [file]: save the stopped trace to [file|osnoise_trace.txt]", " -e/--event <sys:event>: enable the <sys:event> in the trace instance, multiple -e are allowed", " --filter <filter>: enable a trace event filter to the previous -e event", " --trigger <trigger>: enable a trace event trigger to the previous -e event", @@ -471,43 +448,43 @@ static void osnoise_hist_usage(char *usage) " in nanoseconds", " --warm-up: let the workload run for s seconds before collecting data", " --trace-buffer-size kB: set the per-cpu trace buffer size in kB", + " --on-threshold <action>: define action to be executed at stop-total threshold, multiple are allowed", + " --on-end <action>: define action to be executed at measurement end, multiple are allowed", NULL, }; - if (usage) - fprintf(stderr, "%s\n", usage); - fprintf(stderr, "rtla osnoise hist: a per-cpu histogram of the OS noise (version %s)\n", VERSION); for (i = 0; msg[i]; i++) fprintf(stderr, "%s\n", msg[i]); - if (usage) - exit(EXIT_FAILURE); - exit(EXIT_SUCCESS); } /* * osnoise_hist_parse_args - allocs, parse and fill the cmd line parameters */ -static struct osnoise_hist_params +static struct common_params *osnoise_hist_parse_args(int argc, char *argv[]) { - struct osnoise_hist_params *params; + struct osnoise_params *params; struct trace_events *tevent; int retval; int c; + char *trace_output = NULL; params = calloc(1, sizeof(*params)); if (!params) exit(1); + actions_init(¶ms->common.threshold_actions); + actions_init(¶ms->common.end_actions); + /* display data in microseconds */ - params->output_divisor = 1000; - params->bucket_size = 1; - params->entries = 256; + params->common.output_divisor = 1000; + params->common.hist.bucket_size = 1; + params->common.hist.entries = 256; while (1) { static struct option long_options[] = { @@ -536,14 +513,13 @@ static struct osnoise_hist_params {"filter", required_argument, 0, '5'}, {"warm-up", required_argument, 0, '6'}, {"trace-buffer-size", required_argument, 0, '7'}, + {"on-threshold", required_argument, 0, '8'}, + {"on-end", required_argument, 0, '9'}, {0, 0, 0, 0} }; - /* getopt_long stores the option index here. */ - int option_index = 0; - c = getopt_long(argc, argv, "a:c:C::b:d:e:E:DhH:p:P:r:s:S:t::T:01234:5:6:7:", - long_options, &option_index); + long_options, NULL); /* detect the end of the options. */ if (c == -1) @@ -552,247 +528,175 @@ static struct osnoise_hist_params switch (c) { case 'a': /* set sample stop to auto_thresh */ - params->stop_us = get_llong_from_str(optarg); + params->common.stop_us = get_llong_from_str(optarg); /* set sample threshold to 1 */ params->threshold = 1; /* set trace */ - params->trace_output = "osnoise_trace.txt"; + if (!trace_output) + trace_output = "osnoise_trace.txt"; break; case 'b': - params->bucket_size = get_llong_from_str(optarg); - if ((params->bucket_size == 0) || (params->bucket_size >= 1000000)) - osnoise_hist_usage("Bucket size needs to be > 0 and <= 1000000\n"); + params->common.hist.bucket_size = get_llong_from_str(optarg); + if (params->common.hist.bucket_size == 0 || + params->common.hist.bucket_size >= 1000000) + fatal("Bucket size needs to be > 0 and <= 1000000"); break; case 'c': - retval = parse_cpu_set(optarg, ¶ms->monitored_cpus); + retval = parse_cpu_set(optarg, ¶ms->common.monitored_cpus); if (retval) - osnoise_hist_usage("\nInvalid -c cpu list\n"); - params->cpus = optarg; + fatal("Invalid -c cpu list"); + params->common.cpus = optarg; break; case 'C': - params->cgroup = 1; - if (!optarg) { - /* will inherit this cgroup */ - params->cgroup_name = NULL; - } else if (*optarg == '=') { - /* skip the = */ - params->cgroup_name = ++optarg; - } + params->common.cgroup = 1; + params->common.cgroup_name = parse_optional_arg(argc, argv); break; case 'D': config_debug = 1; break; case 'd': - params->duration = parse_seconds_duration(optarg); - if (!params->duration) - osnoise_hist_usage("Invalid -D duration\n"); + params->common.duration = parse_seconds_duration(optarg); + if (!params->common.duration) + 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->events) - tevent->next = params->events; + if (params->common.events) + tevent->next = params->common.events; - params->events = tevent; + params->common.events = tevent; break; case 'E': - params->entries = get_llong_from_str(optarg); - if ((params->entries < 10) || (params->entries > 9999999)) - osnoise_hist_usage("Entries must be > 10 and < 9999999\n"); + params->common.hist.entries = get_llong_from_str(optarg); + if (params->common.hist.entries < 10 || + params->common.hist.entries > 9999999) + fatal("Entries must be > 10 and < 9999999"); break; case 'h': case '?': - osnoise_hist_usage(NULL); + osnoise_hist_usage(); break; case 'H': - params->hk_cpus = 1; - retval = parse_cpu_set(optarg, ¶ms->hk_cpu_set); - if (retval) { - err_msg("Error parsing house keeping CPUs\n"); - exit(EXIT_FAILURE); - } + params->common.hk_cpus = 1; + retval = parse_cpu_set(optarg, ¶ms->common.hk_cpu_set); + if (retval) + fatal("Error parsing house keeping CPUs"); break; case 'p': params->period = get_llong_from_str(optarg); if (params->period > 10000000) - osnoise_hist_usage("Period longer than 10 s\n"); + fatal("Period longer than 10 s"); break; case 'P': - retval = parse_prio(optarg, ¶ms->sched_param); + retval = parse_prio(optarg, ¶ms->common.sched_param); if (retval == -1) - osnoise_hist_usage("Invalid -P priority"); - params->set_sched = 1; + fatal("Invalid -P priority"); + params->common.set_sched = 1; break; case 'r': params->runtime = get_llong_from_str(optarg); if (params->runtime < 100) - osnoise_hist_usage("Runtime shorter than 100 us\n"); + fatal("Runtime shorter than 100 us"); break; case 's': - params->stop_us = get_llong_from_str(optarg); + params->common.stop_us = get_llong_from_str(optarg); break; case 'S': - params->stop_total_us = get_llong_from_str(optarg); + params->common.stop_total_us = get_llong_from_str(optarg); break; case 'T': params->threshold = get_llong_from_str(optarg); break; case 't': - if (optarg) { - if (optarg[0] == '=') - params->trace_output = &optarg[1]; - else - params->trace_output = &optarg[0]; - } else if (optind < argc && argv[optind][0] != '0') - params->trace_output = argv[optind]; - else - params->trace_output = "osnoise_trace.txt"; + trace_output = parse_optional_arg(argc, argv); + if (!trace_output) + trace_output = "osnoise_trace.txt"; break; case '0': /* no header */ - params->no_header = 1; + params->common.hist.no_header = 1; break; case '1': /* no summary */ - params->no_summary = 1; + params->common.hist.no_summary = 1; break; case '2': /* no index */ - params->no_index = 1; + params->common.hist.no_index = 1; break; case '3': /* with zeros */ - params->with_zeros = 1; + params->common.hist.with_zeros = 1; break; case '4': /* trigger */ - if (params->events) { - retval = trace_event_add_trigger(params->events, optarg); - if (retval) { - err_msg("Error adding trigger %s\n", optarg); - exit(EXIT_FAILURE); - } + if (params->common.events) { + retval = trace_event_add_trigger(params->common.events, optarg); + if (retval) + fatal("Error adding trigger %s", optarg); } else { - osnoise_hist_usage("--trigger requires a previous -e\n"); + fatal("--trigger requires a previous -e"); } break; case '5': /* filter */ - if (params->events) { - retval = trace_event_add_filter(params->events, optarg); - if (retval) { - err_msg("Error adding filter %s\n", optarg); - exit(EXIT_FAILURE); - } + if (params->common.events) { + retval = trace_event_add_filter(params->common.events, optarg); + if (retval) + fatal("Error adding filter %s", optarg); } else { - osnoise_hist_usage("--filter requires a previous -e\n"); + fatal("--filter requires a previous -e"); } break; case '6': - params->warmup = get_llong_from_str(optarg); + params->common.warmup = get_llong_from_str(optarg); break; case '7': - params->buffer_size = get_llong_from_str(optarg); + params->common.buffer_size = get_llong_from_str(optarg); + break; + case '8': + retval = actions_parse(¶ms->common.threshold_actions, optarg, + "osnoise_trace.txt"); + if (retval) + fatal("Invalid action %s", optarg); + break; + case '9': + retval = actions_parse(¶ms->common.end_actions, optarg, + "osnoise_trace.txt"); + if (retval) + fatal("Invalid action %s", optarg); break; default: - osnoise_hist_usage("Invalid option"); + fatal("Invalid option"); } } - if (geteuid()) { - err_msg("rtla needs root permission\n"); - exit(EXIT_FAILURE); - } + if (trace_output) + actions_add_trace_output(¶ms->common.threshold_actions, trace_output); + + if (geteuid()) + fatal("rtla needs root permission"); - if (params->no_index && !params->with_zeros) - osnoise_hist_usage("no-index set and with-zeros not set - it does not make sense"); + if (params->common.hist.no_index && !params->common.hist.with_zeros) + fatal("no-index set and with-zeros not set - it does not make sense"); - return params; + return ¶ms->common; } /* * osnoise_hist_apply_config - apply the hist configs to the initialized tool */ static int -osnoise_hist_apply_config(struct osnoise_tool *tool, struct osnoise_hist_params *params) +osnoise_hist_apply_config(struct osnoise_tool *tool) { - int retval; - - if (!params->sleep_time) - params->sleep_time = 1; - - if (params->cpus) { - retval = osnoise_set_cpus(tool->context, params->cpus); - if (retval) { - err_msg("Failed to apply CPUs config\n"); - goto out_err; - } - } - - if (params->runtime || params->period) { - retval = osnoise_set_runtime_period(tool->context, - params->runtime, - params->period); - if (retval) { - err_msg("Failed to set runtime and/or period\n"); - goto out_err; - } - } - - if (params->stop_us) { - retval = osnoise_set_stop_us(tool->context, params->stop_us); - if (retval) { - err_msg("Failed to set stop us\n"); - goto out_err; - } - } - - if (params->stop_total_us) { - retval = osnoise_set_stop_total_us(tool->context, params->stop_total_us); - if (retval) { - err_msg("Failed to set stop total us\n"); - goto out_err; - } - } - - if (params->threshold) { - retval = osnoise_set_tracing_thresh(tool->context, params->threshold); - if (retval) { - err_msg("Failed to set tracing_thresh\n"); - goto out_err; - } - } - - if (params->hk_cpus) { - retval = sched_setaffinity(getpid(), sizeof(params->hk_cpu_set), - ¶ms->hk_cpu_set); - if (retval == -1) { - err_msg("Failed to set rtla to the house keeping CPUs\n"); - goto out_err; - } - } else if (params->cpus) { - /* - * Even if the user do not set a house-keeping CPU, try to - * move rtla to a CPU set different to the one where the user - * set the workload to run. - * - * No need to check results as this is an automatic attempt. - */ - auto_house_keeping(¶ms->monitored_cpus); - } - - return 0; - -out_err: - return -1; + return osnoise_apply_config(tool, to_osnoise_params(tool->params)); } /* * osnoise_init_hist - initialize a osnoise hist tool with parameters */ static struct osnoise_tool -*osnoise_init_hist(struct osnoise_hist_params *params) +*osnoise_init_hist(struct common_params *params) { struct osnoise_tool *tool; int nr_cpus; @@ -803,12 +707,11 @@ static struct osnoise_tool if (!tool) return NULL; - tool->data = osnoise_alloc_histogram(nr_cpus, params->entries, params->bucket_size); + tool->data = osnoise_alloc_histogram(nr_cpus, params->hist.entries, + params->hist.bucket_size); if (!tool->data) goto out_err; - tool->params = params; - return tool; out_err: @@ -816,172 +719,35 @@ out_err: return NULL; } -static int stop_tracing; -static void stop_hist(int sig) -{ - stop_tracing = 1; -} - -/* - * osnoise_hist_set_signals - handles the signal to stop the tool - */ -static void -osnoise_hist_set_signals(struct osnoise_hist_params *params) -{ - signal(SIGINT, stop_hist); - if (params->duration) { - signal(SIGALRM, stop_hist); - alarm(params->duration); - } -} - -int osnoise_hist_main(int argc, char *argv[]) +static int osnoise_hist_enable(struct osnoise_tool *tool) { - struct osnoise_hist_params *params; - struct osnoise_tool *record = NULL; - struct osnoise_tool *tool = NULL; - struct trace_instance *trace; - int return_value = 1; int retval; - params = osnoise_hist_parse_args(argc, argv); - if (!params) - exit(1); - - tool = osnoise_init_hist(params); - if (!tool) { - err_msg("Could not init osnoise hist\n"); - goto out_exit; - } - - retval = osnoise_hist_apply_config(tool, params); - if (retval) { - err_msg("Could not apply config\n"); - goto out_destroy; - } - - trace = &tool->trace; - - retval = enable_osnoise(trace); - if (retval) { - err_msg("Failed to enable osnoise tracer\n"); - goto out_destroy; - } - retval = osnoise_init_trace_hist(tool); if (retval) - goto out_destroy; - - if (params->set_sched) { - retval = set_comm_sched_attr("osnoise/", ¶ms->sched_param); - if (retval) { - err_msg("Failed to set sched parameters\n"); - goto out_free; - } - } - - if (params->cgroup) { - retval = set_comm_cgroup("timerlat/", params->cgroup_name); - if (!retval) { - err_msg("Failed to move threads to cgroup\n"); - goto out_free; - } - } - - if (params->trace_output) { - record = osnoise_init_trace_tool("osnoise"); - if (!record) { - err_msg("Failed to enable the trace instance\n"); - goto out_free; - } - - if (params->events) { - retval = trace_events_enable(&record->trace, params->events); - if (retval) - goto out_hist; - } - - if (params->buffer_size > 0) { - retval = trace_set_buffer_size(&record->trace, params->buffer_size); - if (retval) - goto out_hist; - } - } - - /* - * Start the tracer here, after having set all instances. - * - * Let the trace instance start first for the case of hitting a stop - * tracing while enabling other instances. The trace instance is the - * one with most valuable information. - */ - if (params->trace_output) - trace_instance_start(&record->trace); - trace_instance_start(trace); - - if (params->warmup > 0) { - debug_msg("Warming up for %d seconds\n", params->warmup); - sleep(params->warmup); - if (stop_tracing) - goto out_hist; - - /* - * Clean up the buffer. The osnoise workload do not run - * with tracing off to avoid creating a performance penalty - * when not needed. - */ - retval = tracefs_instance_file_write(trace->inst, "trace", ""); - if (retval < 0) { - debug_msg("Error cleaning up the buffer"); - goto out_hist; - } - - } + return retval; - tool->start_time = time(NULL); - osnoise_hist_set_signals(params); - - while (!stop_tracing) { - sleep(params->sleep_time); - - retval = tracefs_iterate_raw_events(trace->tep, - trace->inst, - NULL, - 0, - collect_registered_events, - trace); - if (retval < 0) { - err_msg("Error iterating on events\n"); - goto out_hist; - } + return osnoise_enable(tool); +} - if (trace_is_off(&tool->trace, &record->trace)) - break; - } +static int osnoise_hist_main_loop(struct osnoise_tool *tool) +{ + int retval; + retval = hist_main_loop(tool); osnoise_read_trace_hist(tool); - osnoise_print_stats(params, tool); - - return_value = 0; - - if (trace_is_off(&tool->trace, &record->trace)) { - printf("rtla osnoise hit stop tracing\n"); - if (params->trace_output) { - printf(" Saving trace to %s\n", params->trace_output); - save_trace_to_file(record->trace.inst, params->trace_output); - } - } - -out_hist: - trace_events_destroy(&record->trace, params->events); - params->events = NULL; -out_free: - osnoise_free_histogram(tool->data); -out_destroy: - osnoise_destroy_tool(record); - osnoise_destroy_tool(tool); - free(params); -out_exit: - exit(return_value); + return retval; } + +struct tool_ops osnoise_hist_ops = { + .tracer = "osnoise", + .comm_prefix = "osnoise/", + .parse_args = osnoise_hist_parse_args, + .init_tool = osnoise_init_hist, + .apply_config = osnoise_hist_apply_config, + .enable = osnoise_hist_enable, + .main = osnoise_hist_main_loop, + .print_stats = osnoise_print_stats, + .free = osnoise_free_hist_tool, +}; |