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rtla/osnoise: Add the hist mode
The rtla osnoise hist tool collects all osnoise:sample_threshold occurrence in a histogram, displaying the results in a user-friendly way. The tool also allows many configurations of the osnoise tracer and the collection of the tracer output. Here is one example of the rtla osnoise hist tool output: ---------- %< ---------- [root@f34 ~]# rtla osnoise hist --bucket-size 10 --entries 100 -c 0-8 -d 1M -r 9000 -P F:1 # RTLA osnoise histogram # Time unit is microseconds (us) # Duration: 0 00:01:00 Index CPU-000 CPU-001 CPU-002 CPU-003 CPU-004 CPU-005 CPU-006 CPU-007 CPU-008 0 430 434 352 455 440 463 467 436 484 10 88 88 92 141 120 100 126 166 100 20 19 7 12 22 8 8 13 13 16 30 6 0 2 0 1 2 2 1 0 50 0 0 0 0 0 0 1 0 0 over: 0 0 0 0 0 0 0 0 0 count: 543 529 458 618 569 573 609 616 600 min: 0 0 0 0 0 0 0 0 0 avg: 0 0 0 0 0 0 0 0 0 max: 30 20 30 20 30 30 50 30 20 ---------- >% ---------- Running - rtla osnoise hist --help provides information about the available options. Link: https://lkml.kernel.org/r/c68060544de89b8b62510ed91c7369f162eb465b.1639158831.git.bristot@kernel.org Cc: Tao Zhou <tao.zhou@linux.dev> Cc: Ingo Molnar <mingo@redhat.com> Cc: Tom Zanussi <zanussi@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Clark Williams <williams@redhat.com> Cc: John Kacur <jkacur@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Daniel Bristot de Oliveira <bristot@kernel.org> Cc: linux-rt-users@vger.kernel.org Cc: linux-trace-devel@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Daniel Bristot de Oliveira
Steven Rostedt
parent
1eceb2fc2c
commit
829a6c0b56
@ -828,7 +828,8 @@ static void osnoise_usage(void)
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" usage: [rtla] osnoise [MODE] ...",
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"",
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" modes:",
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" top - prints the summary from osnoise tracer",
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" top - prints the summary from osnoise tracer",
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" hist - prints a histogram of osnoise samples",
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"",
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"if no MODE is given, the top mode is called, passing the arguments",
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NULL,
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@ -863,6 +864,9 @@ int osnoise_main(int argc, char *argv[])
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} else if (strcmp(argv[1], "top") == 0) {
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osnoise_top_main(argc-1, &argv[1]);
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exit(0);
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} else if (strcmp(argv[1], "hist") == 0) {
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osnoise_hist_main(argc-1, &argv[1]);
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exit(0);
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}
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usage:
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@ -86,5 +86,6 @@ void osnoise_destroy_tool(struct osnoise_tool *top);
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struct osnoise_tool *osnoise_init_tool(char *tool_name);
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struct osnoise_tool *osnoise_init_trace_tool(char *tracer);
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int osnoise_hist_main(int argc, char *argv[]);
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int osnoise_top_main(int argc, char **argv);
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int osnoise_main(int argc, char **argv);
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801
tools/tracing/rtla/src/osnoise_hist.c
Normal file
801
tools/tracing/rtla/src/osnoise_hist.c
Normal file
@ -0,0 +1,801 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2021 Red Hat Inc, Daniel Bristot de Oliveira <bristot@kernel.org>
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*/
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#include <getopt.h>
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#include <stdlib.h>
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#include <string.h>
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#include <signal.h>
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#include <unistd.h>
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#include <errno.h>
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#include <stdio.h>
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#include <time.h>
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#include "utils.h"
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#include "osnoise.h"
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struct osnoise_hist_params {
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char *cpus;
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char *monitored_cpus;
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char *trace_output;
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unsigned long long runtime;
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unsigned long long period;
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long long stop_us;
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long long stop_total_us;
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int sleep_time;
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int duration;
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int set_sched;
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int output_divisor;
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struct sched_attr sched_param;
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char no_header;
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char no_summary;
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char no_index;
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char with_zeros;
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int bucket_size;
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int entries;
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};
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struct osnoise_hist_cpu {
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int *samples;
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int count;
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unsigned long long min_sample;
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unsigned long long sum_sample;
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unsigned long long max_sample;
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};
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struct osnoise_hist_data {
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struct tracefs_hist *trace_hist;
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struct osnoise_hist_cpu *hist;
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int entries;
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int bucket_size;
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int nr_cpus;
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};
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/*
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* osnoise_free_histogram - free runtime data
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*/
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static void
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osnoise_free_histogram(struct osnoise_hist_data *data)
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{
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int cpu;
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/* one histogram for IRQ and one for thread, per CPU */
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for (cpu = 0; cpu < data->nr_cpus; cpu++) {
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if (data->hist[cpu].samples)
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free(data->hist[cpu].samples);
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}
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/* one set of histograms per CPU */
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if (data->hist)
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free(data->hist);
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free(data);
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}
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/*
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* osnoise_alloc_histogram - alloc runtime data
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*/
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static struct osnoise_hist_data
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*osnoise_alloc_histogram(int nr_cpus, int entries, int bucket_size)
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{
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struct osnoise_hist_data *data;
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int cpu;
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data = calloc(1, sizeof(*data));
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if (!data)
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return NULL;
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data->entries = entries;
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data->bucket_size = bucket_size;
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data->nr_cpus = nr_cpus;
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data->hist = calloc(1, sizeof(*data->hist) * nr_cpus);
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if (!data->hist)
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goto cleanup;
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for (cpu = 0; cpu < nr_cpus; cpu++) {
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data->hist[cpu].samples = calloc(1, sizeof(*data->hist->samples) * (entries + 1));
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if (!data->hist[cpu].samples)
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goto cleanup;
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}
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/* set the min to max */
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for (cpu = 0; cpu < nr_cpus; cpu++)
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data->hist[cpu].min_sample = ~0;
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return data;
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cleanup:
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osnoise_free_histogram(data);
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return NULL;
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}
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static void osnoise_hist_update_multiple(struct osnoise_tool *tool, int cpu,
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unsigned long long duration, int count)
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{
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struct osnoise_hist_params *params = tool->params;
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struct osnoise_hist_data *data = tool->data;
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int entries = data->entries;
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int bucket;
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int *hist;
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if (params->output_divisor)
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duration = duration / params->output_divisor;
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if (data->bucket_size)
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bucket = duration / data->bucket_size;
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hist = data->hist[cpu].samples;
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data->hist[cpu].count += count;
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update_min(&data->hist[cpu].min_sample, &duration);
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update_sum(&data->hist[cpu].sum_sample, &duration);
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update_max(&data->hist[cpu].max_sample, &duration);
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if (bucket < entries)
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hist[bucket] += count;
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else
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hist[entries] += count;
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}
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/*
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* osnoise_destroy_trace_hist - disable events used to collect histogram
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*/
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static void osnoise_destroy_trace_hist(struct osnoise_tool *tool)
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{
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struct osnoise_hist_data *data = tool->data;
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tracefs_hist_pause(tool->trace.inst, data->trace_hist);
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tracefs_hist_destroy(tool->trace.inst, data->trace_hist);
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}
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/*
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* osnoise_init_trace_hist - enable events used to collect histogram
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*/
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static int osnoise_init_trace_hist(struct osnoise_tool *tool)
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{
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struct osnoise_hist_params *params = tool->params;
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struct osnoise_hist_data *data = tool->data;
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int bucket_size;
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char buff[128];
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int retval = 0;
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/*
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* Set the size of the bucket.
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*/
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bucket_size = params->output_divisor * params->bucket_size;
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snprintf(buff, sizeof(buff), "duration.buckets=%d", bucket_size);
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data->trace_hist = tracefs_hist_alloc(tool->trace.tep, "osnoise", "sample_threshold",
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buff, TRACEFS_HIST_KEY_NORMAL);
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if (!data->trace_hist)
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return 1;
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retval = tracefs_hist_add_key(data->trace_hist, "cpu", 0);
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if (retval)
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goto out_err;
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retval = tracefs_hist_start(tool->trace.inst, data->trace_hist);
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if (retval)
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goto out_err;
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return 0;
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out_err:
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osnoise_destroy_trace_hist(tool);
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return 1;
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}
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/*
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* osnoise_read_trace_hist - parse histogram file and file osnoise histogram
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*/
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static void osnoise_read_trace_hist(struct osnoise_tool *tool)
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{
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struct osnoise_hist_data *data = tool->data;
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long long cpu, counter, duration;
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char *content, *position;
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tracefs_hist_pause(tool->trace.inst, data->trace_hist);
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content = tracefs_event_file_read(tool->trace.inst, "osnoise",
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"sample_threshold",
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"hist", NULL);
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if (!content)
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return;
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position = content;
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while (true) {
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position = strstr(position, "duration: ~");
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if (!position)
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break;
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position += strlen("duration: ~");
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duration = get_llong_from_str(position);
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if (duration == -1)
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err_msg("error reading duration from histogram\n");
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position = strstr(position, "cpu:");
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if (!position)
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break;
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position += strlen("cpu: ");
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cpu = get_llong_from_str(position);
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if (cpu == -1)
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err_msg("error reading cpu from histogram\n");
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position = strstr(position, "hitcount:");
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if (!position)
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break;
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position += strlen("hitcount: ");
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counter = get_llong_from_str(position);
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if (counter == -1)
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err_msg("error reading counter from histogram\n");
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osnoise_hist_update_multiple(tool, cpu, duration, counter);
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}
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free(content);
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}
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/*
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* osnoise_hist_header - print the header of the tracer to the output
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*/
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static void osnoise_hist_header(struct osnoise_tool *tool)
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{
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struct osnoise_hist_params *params = tool->params;
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struct osnoise_hist_data *data = tool->data;
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struct trace_seq *s = tool->trace.seq;
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char duration[26];
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int cpu;
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if (params->no_header)
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return;
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get_duration(tool->start_time, duration, sizeof(duration));
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trace_seq_printf(s, "# RTLA osnoise histogram\n");
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trace_seq_printf(s, "# Time unit is %s (%s)\n",
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params->output_divisor == 1 ? "nanoseconds" : "microseconds",
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params->output_divisor == 1 ? "ns" : "us");
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trace_seq_printf(s, "# Duration: %s\n", duration);
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if (!params->no_index)
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trace_seq_printf(s, "Index");
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for (cpu = 0; cpu < data->nr_cpus; cpu++) {
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if (params->cpus && !params->monitored_cpus[cpu])
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continue;
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if (!data->hist[cpu].count)
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continue;
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trace_seq_printf(s, " CPU-%03d", cpu);
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}
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trace_seq_printf(s, "\n");
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trace_seq_do_printf(s);
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trace_seq_reset(s);
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}
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/*
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* osnoise_print_summary - print the summary of the hist data to the output
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*/
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static void
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osnoise_print_summary(struct osnoise_hist_params *params,
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struct trace_instance *trace,
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struct osnoise_hist_data *data)
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{
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int cpu;
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if (params->no_summary)
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return;
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if (!params->no_index)
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trace_seq_printf(trace->seq, "count:");
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for (cpu = 0; cpu < data->nr_cpus; cpu++) {
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if (params->cpus && !params->monitored_cpus[cpu])
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continue;
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if (!data->hist[cpu].count)
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continue;
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trace_seq_printf(trace->seq, "%9d ", data->hist[cpu].count);
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}
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trace_seq_printf(trace->seq, "\n");
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if (!params->no_index)
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trace_seq_printf(trace->seq, "min: ");
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for (cpu = 0; cpu < data->nr_cpus; cpu++) {
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if (params->cpus && !params->monitored_cpus[cpu])
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continue;
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if (!data->hist[cpu].count)
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continue;
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trace_seq_printf(trace->seq, "%9llu ", data->hist[cpu].min_sample);
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}
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trace_seq_printf(trace->seq, "\n");
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if (!params->no_index)
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trace_seq_printf(trace->seq, "avg: ");
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for (cpu = 0; cpu < data->nr_cpus; cpu++) {
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if (params->cpus && !params->monitored_cpus[cpu])
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continue;
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if (!data->hist[cpu].count)
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continue;
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if (data->hist[cpu].count)
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trace_seq_printf(trace->seq, "%9llu ",
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data->hist[cpu].sum_sample / data->hist[cpu].count);
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else
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trace_seq_printf(trace->seq, " - ");
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}
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trace_seq_printf(trace->seq, "\n");
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if (!params->no_index)
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trace_seq_printf(trace->seq, "max: ");
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for (cpu = 0; cpu < data->nr_cpus; cpu++) {
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if (params->cpus && !params->monitored_cpus[cpu])
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continue;
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if (!data->hist[cpu].count)
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continue;
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trace_seq_printf(trace->seq, "%9llu ", data->hist[cpu].max_sample);
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}
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trace_seq_printf(trace->seq, "\n");
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trace_seq_do_printf(trace->seq);
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trace_seq_reset(trace->seq);
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}
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/*
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* osnoise_print_stats - print data for all CPUs
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*/
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static void
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osnoise_print_stats(struct osnoise_hist_params *params, struct osnoise_tool *tool)
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{
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struct osnoise_hist_data *data = tool->data;
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struct trace_instance *trace = &tool->trace;
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int bucket, cpu;
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int total;
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osnoise_hist_header(tool);
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for (bucket = 0; bucket < data->entries; bucket++) {
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total = 0;
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if (!params->no_index)
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trace_seq_printf(trace->seq, "%-6d",
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bucket * data->bucket_size);
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for (cpu = 0; cpu < data->nr_cpus; cpu++) {
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if (params->cpus && !params->monitored_cpus[cpu])
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continue;
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if (!data->hist[cpu].count)
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continue;
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total += data->hist[cpu].samples[bucket];
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trace_seq_printf(trace->seq, "%9d ", data->hist[cpu].samples[bucket]);
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}
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if (total == 0 && !params->with_zeros) {
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trace_seq_reset(trace->seq);
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continue;
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}
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trace_seq_printf(trace->seq, "\n");
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trace_seq_do_printf(trace->seq);
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trace_seq_reset(trace->seq);
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}
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if (!params->no_index)
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trace_seq_printf(trace->seq, "over: ");
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for (cpu = 0; cpu < data->nr_cpus; cpu++) {
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if (params->cpus && !params->monitored_cpus[cpu])
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continue;
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if (!data->hist[cpu].count)
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continue;
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trace_seq_printf(trace->seq, "%9d ",
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data->hist[cpu].samples[data->entries]);
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}
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trace_seq_printf(trace->seq, "\n");
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trace_seq_do_printf(trace->seq);
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trace_seq_reset(trace->seq);
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osnoise_print_summary(params, trace, data);
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}
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/*
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* osnoise_hist_usage - prints osnoise hist usage message
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*/
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static void osnoise_hist_usage(char *usage)
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{
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int i;
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static const char * const msg[] = {
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"",
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" usage: rtla osnoise hist [-h] [-D] [-d s] [-p us] [-r us] [-s us] [-S us] [-t[=file]] \\",
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" [-c cpu-list] [-P priority] [-b N] [-e N] [--no-header] [--no-summary] \\",
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" [--no-index] [--with-zeros]",
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"",
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" -h/--help: print this menu",
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" -p/--period us: osnoise period in us",
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" -r/--runtime us: osnoise runtime in us",
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" -s/--stop us: stop trace if a single sample is higher than the argument in us",
|
||||
" -S/--stop-total us: stop trace if the total sample is higher than the argument in us",
|
||||
" -c/--cpus cpu-list: list of cpus to run osnoise threads",
|
||||
" -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]",
|
||||
" -b/--bucket-size N: set the histogram bucket size (default 1)",
|
||||
" -e/--entries N: set the number of entries of the histogram (default 256)",
|
||||
" --no-header: do not print header",
|
||||
" --no-summary: do not print summary",
|
||||
" --no-index: do not print index",
|
||||
" --with-zeros: print zero only entries",
|
||||
" -P/--priority o:prio|r:prio|f:prio|d:runtime:period: set scheduling parameters",
|
||||
" o:prio - use SCHED_OTHER with prio",
|
||||
" r:prio - use SCHED_RR with prio",
|
||||
" f:prio - use SCHED_FIFO with prio",
|
||||
" d:runtime[us|ms|s]:period[us|ms|s] - use SCHED_DEADLINE with runtime and period",
|
||||
" in nanoseconds",
|
||||
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]);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
/*
|
||||
* osnoise_hist_parse_args - allocs, parse and fill the cmd line parameters
|
||||
*/
|
||||
static struct osnoise_hist_params
|
||||
*osnoise_hist_parse_args(int argc, char *argv[])
|
||||
{
|
||||
struct osnoise_hist_params *params;
|
||||
int retval;
|
||||
int c;
|
||||
|
||||
params = calloc(1, sizeof(*params));
|
||||
if (!params)
|
||||
exit(1);
|
||||
|
||||
/* display data in microseconds */
|
||||
params->output_divisor = 1000;
|
||||
params->bucket_size = 1;
|
||||
params->entries = 256;
|
||||
|
||||
while (1) {
|
||||
static struct option long_options[] = {
|
||||
{"bucket-size", required_argument, 0, 'b'},
|
||||
{"entries", required_argument, 0, 'e'},
|
||||
{"cpus", required_argument, 0, 'c'},
|
||||
{"debug", no_argument, 0, 'D'},
|
||||
{"duration", required_argument, 0, 'd'},
|
||||
{"help", no_argument, 0, 'h'},
|
||||
{"period", required_argument, 0, 'p'},
|
||||
{"priority", required_argument, 0, 'P'},
|
||||
{"runtime", required_argument, 0, 'r'},
|
||||
{"stop", required_argument, 0, 's'},
|
||||
{"stop-total", required_argument, 0, 'S'},
|
||||
{"trace", optional_argument, 0, 't'},
|
||||
{"no-header", no_argument, 0, '0'},
|
||||
{"no-summary", no_argument, 0, '1'},
|
||||
{"no-index", no_argument, 0, '2'},
|
||||
{"with-zeros", no_argument, 0, '3'},
|
||||
{0, 0, 0, 0}
|
||||
};
|
||||
|
||||
/* getopt_long stores the option index here. */
|
||||
int option_index = 0;
|
||||
|
||||
c = getopt_long(argc, argv, "c:b:d:e:Dhp:P:r:s:S:t::0123",
|
||||
long_options, &option_index);
|
||||
|
||||
/* detect the end of the options. */
|
||||
if (c == -1)
|
||||
break;
|
||||
|
||||
switch (c) {
|
||||
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");
|
||||
break;
|
||||
case 'c':
|
||||
retval = parse_cpu_list(optarg, ¶ms->monitored_cpus);
|
||||
if (retval)
|
||||
osnoise_hist_usage("\nInvalid -c cpu list\n");
|
||||
params->cpus = optarg;
|
||||
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");
|
||||
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");
|
||||
break;
|
||||
case 'h':
|
||||
case '?':
|
||||
osnoise_hist_usage(NULL);
|
||||
break;
|
||||
case 'p':
|
||||
params->period = get_llong_from_str(optarg);
|
||||
if (params->period > 10000000)
|
||||
osnoise_hist_usage("Period longer than 10 s\n");
|
||||
break;
|
||||
case 'P':
|
||||
retval = parse_prio(optarg, ¶ms->sched_param);
|
||||
if (retval == -1)
|
||||
osnoise_hist_usage("Invalid -P priority");
|
||||
params->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");
|
||||
break;
|
||||
case 's':
|
||||
params->stop_us = get_llong_from_str(optarg);
|
||||
break;
|
||||
case 'S':
|
||||
params->stop_total_us = get_llong_from_str(optarg);
|
||||
break;
|
||||
case 't':
|
||||
if (optarg)
|
||||
/* skip = */
|
||||
params->trace_output = &optarg[1];
|
||||
else
|
||||
params->trace_output = "osnoise_trace.txt";
|
||||
break;
|
||||
case '0': /* no header */
|
||||
params->no_header = 1;
|
||||
break;
|
||||
case '1': /* no summary */
|
||||
params->no_summary = 1;
|
||||
break;
|
||||
case '2': /* no index */
|
||||
params->no_index = 1;
|
||||
break;
|
||||
case '3': /* with zeros */
|
||||
params->with_zeros = 1;
|
||||
break;
|
||||
default:
|
||||
osnoise_hist_usage("Invalid option");
|
||||
}
|
||||
}
|
||||
|
||||
if (geteuid()) {
|
||||
err_msg("rtla needs root permission\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
if (params->no_index && !params->with_zeros)
|
||||
osnoise_hist_usage("no-index set and with-zeros not set - it does not make sense");
|
||||
|
||||
return params;
|
||||
}
|
||||
|
||||
/*
|
||||
* 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)
|
||||
{
|
||||
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;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
out_err:
|
||||
return -1;
|
||||
}
|
||||
|
||||
/*
|
||||
* osnoise_init_hist - initialize a osnoise hist tool with parameters
|
||||
*/
|
||||
static struct osnoise_tool
|
||||
*osnoise_init_hist(struct osnoise_hist_params *params)
|
||||
{
|
||||
struct osnoise_tool *tool;
|
||||
int nr_cpus;
|
||||
|
||||
nr_cpus = sysconf(_SC_NPROCESSORS_CONF);
|
||||
|
||||
tool = osnoise_init_tool("osnoise_hist");
|
||||
if (!tool)
|
||||
return NULL;
|
||||
|
||||
tool->data = osnoise_alloc_histogram(nr_cpus, params->entries, params->bucket_size);
|
||||
if (!tool->data)
|
||||
goto out_err;
|
||||
|
||||
tool->params = params;
|
||||
|
||||
return tool;
|
||||
|
||||
out_err:
|
||||
osnoise_destroy_tool(tool);
|
||||
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[])
|
||||
{
|
||||
struct osnoise_hist_params *params;
|
||||
struct trace_instance *trace;
|
||||
struct osnoise_tool *record;
|
||||
struct osnoise_tool *tool;
|
||||
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_hist;
|
||||
}
|
||||
}
|
||||
|
||||
trace_instance_start(trace);
|
||||
|
||||
if (params->trace_output) {
|
||||
record = osnoise_init_trace_tool("osnoise");
|
||||
if (!record) {
|
||||
err_msg("Failed to enable the trace instance\n");
|
||||
goto out_hist;
|
||||
}
|
||||
trace_instance_start(&record->trace);
|
||||
}
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
if (!tracefs_trace_is_on(trace->inst))
|
||||
break;
|
||||
};
|
||||
|
||||
osnoise_read_trace_hist(tool);
|
||||
|
||||
osnoise_print_stats(params, tool);
|
||||
|
||||
return_value = 0;
|
||||
|
||||
if (!tracefs_trace_is_on(trace->inst)) {
|
||||
printf("rtla timelat 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:
|
||||
osnoise_free_histogram(tool->data);
|
||||
out_destroy:
|
||||
osnoise_destroy_tool(tool);
|
||||
if (params->trace_output)
|
||||
osnoise_destroy_tool(record);
|
||||
free(params);
|
||||
out_exit:
|
||||
exit(return_value);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user