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-rw-r--r--tools/tracing/rtla/src/osnoise_hist.c753
1 files changed, 753 insertions, 0 deletions
diff --git a/tools/tracing/rtla/src/osnoise_hist.c b/tools/tracing/rtla/src/osnoise_hist.c
new file mode 100644
index 000000000000..ff8c231e47c4
--- /dev/null
+++ b/tools/tracing/rtla/src/osnoise_hist.c
@@ -0,0 +1,753 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 Red Hat Inc, Daniel Bristot de Oliveira <bristot@kernel.org>
+ */
+
+#define _GNU_SOURCE
+#include <getopt.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdio.h>
+#include <time.h>
+
+#include "osnoise.h"
+
+struct osnoise_hist_cpu {
+ int *samples;
+ int count;
+
+ unsigned long long min_sample;
+ unsigned long long sum_sample;
+ unsigned long long max_sample;
+
+};
+
+struct osnoise_hist_data {
+ struct tracefs_hist *trace_hist;
+ struct osnoise_hist_cpu *hist;
+ int entries;
+ int bucket_size;
+ int nr_cpus;
+};
+
+/*
+ * osnoise_free_histogram - free runtime data
+ */
+static void
+osnoise_free_histogram(struct osnoise_hist_data *data)
+{
+ int cpu;
+
+ /* one histogram for IRQ and one for thread, per CPU */
+ for (cpu = 0; cpu < data->nr_cpus; cpu++) {
+ if (data->hist[cpu].samples)
+ free(data->hist[cpu].samples);
+ }
+
+ /* one set of histograms per CPU */
+ if (data->hist)
+ free(data->hist);
+
+ free(data);
+}
+
+static void osnoise_free_hist_tool(struct osnoise_tool *tool)
+{
+ osnoise_free_histogram(tool->data);
+}
+
+/*
+ * osnoise_alloc_histogram - alloc runtime data
+ */
+static struct osnoise_hist_data
+*osnoise_alloc_histogram(int nr_cpus, int entries, int bucket_size)
+{
+ struct osnoise_hist_data *data;
+ int cpu;
+
+ data = calloc(1, sizeof(*data));
+ if (!data)
+ return NULL;
+
+ data->entries = entries;
+ data->bucket_size = bucket_size;
+ data->nr_cpus = nr_cpus;
+
+ data->hist = calloc(1, sizeof(*data->hist) * nr_cpus);
+ if (!data->hist)
+ goto cleanup;
+
+ for (cpu = 0; cpu < nr_cpus; cpu++) {
+ data->hist[cpu].samples = calloc(1, sizeof(*data->hist->samples) * (entries + 1));
+ if (!data->hist[cpu].samples)
+ goto cleanup;
+ }
+
+ /* set the min to max */
+ for (cpu = 0; cpu < nr_cpus; cpu++)
+ data->hist[cpu].min_sample = ~0;
+
+ return data;
+
+cleanup:
+ osnoise_free_histogram(data);
+ return NULL;
+}
+
+static void osnoise_hist_update_multiple(struct osnoise_tool *tool, int cpu,
+ unsigned long long duration, int count)
+{
+ 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->common.output_divisor)
+ duration = duration / params->common.output_divisor;
+
+ bucket = duration / data->bucket_size;
+
+ total_duration = duration * count;
+
+ hist = data->hist[cpu].samples;
+ data->hist[cpu].count += count;
+ update_min(&data->hist[cpu].min_sample, &duration);
+ update_sum(&data->hist[cpu].sum_sample, &total_duration);
+ update_max(&data->hist[cpu].max_sample, &duration);
+
+ if (bucket < entries)
+ hist[bucket] += count;
+ else
+ hist[entries] += count;
+}
+
+/*
+ * osnoise_destroy_trace_hist - disable events used to collect histogram
+ */
+static void osnoise_destroy_trace_hist(struct osnoise_tool *tool)
+{
+ struct osnoise_hist_data *data = tool->data;
+
+ tracefs_hist_pause(tool->trace.inst, data->trace_hist);
+ tracefs_hist_destroy(tool->trace.inst, data->trace_hist);
+}
+
+/*
+ * osnoise_init_trace_hist - enable events used to collect histogram
+ */
+static int osnoise_init_trace_hist(struct osnoise_tool *tool)
+{
+ struct osnoise_params *params = to_osnoise_params(tool->params);
+ struct osnoise_hist_data *data = tool->data;
+ int bucket_size;
+ char buff[128];
+ int retval = 0;
+
+ /*
+ * Set the size of the bucket.
+ */
+ 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",
+ buff, TRACEFS_HIST_KEY_NORMAL);
+ if (!data->trace_hist)
+ return 1;
+
+ retval = tracefs_hist_add_key(data->trace_hist, "cpu", 0);
+ if (retval)
+ goto out_err;
+
+ retval = tracefs_hist_start(tool->trace.inst, data->trace_hist);
+ if (retval)
+ goto out_err;
+
+ return 0;
+
+out_err:
+ osnoise_destroy_trace_hist(tool);
+ return 1;
+}
+
+/*
+ * osnoise_read_trace_hist - parse histogram file and file osnoise histogram
+ */
+static void osnoise_read_trace_hist(struct osnoise_tool *tool)
+{
+ struct osnoise_hist_data *data = tool->data;
+ long long cpu, counter, duration;
+ char *content, *position;
+
+ tracefs_hist_pause(tool->trace.inst, data->trace_hist);
+
+ content = tracefs_event_file_read(tool->trace.inst, "osnoise",
+ "sample_threshold",
+ "hist", NULL);
+ if (!content)
+ return;
+
+ position = content;
+ while (true) {
+ position = strstr(position, "duration: ~");
+ if (!position)
+ break;
+ position += strlen("duration: ~");
+ duration = get_llong_from_str(position);
+ if (duration == -1)
+ err_msg("error reading duration from histogram\n");
+
+ position = strstr(position, "cpu:");
+ if (!position)
+ break;
+ position += strlen("cpu: ");
+ cpu = get_llong_from_str(position);
+ if (cpu == -1)
+ err_msg("error reading cpu from histogram\n");
+
+ position = strstr(position, "hitcount:");
+ if (!position)
+ break;
+ position += strlen("hitcount: ");
+ counter = get_llong_from_str(position);
+ if (counter == -1)
+ err_msg("error reading counter from histogram\n");
+
+ osnoise_hist_update_multiple(tool, cpu, duration, counter);
+ }
+ free(content);
+}
+
+/*
+ * osnoise_hist_header - print the header of the tracer to the output
+ */
+static void osnoise_hist_header(struct osnoise_tool *tool)
+{
+ 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->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->common.output_divisor == 1 ? "nanoseconds" : "microseconds",
+ params->common.output_divisor == 1 ? "ns" : "us");
+
+ trace_seq_printf(s, "# Duration: %s\n", duration);
+
+ if (!params->common.hist.no_index)
+ trace_seq_printf(s, "Index");
+
+ for_each_monitored_cpu(cpu, data->nr_cpus, &params->common) {
+
+ if (!data->hist[cpu].count)
+ continue;
+
+ trace_seq_printf(s, " CPU-%03d", cpu);
+ }
+ trace_seq_printf(s, "\n");
+
+ trace_seq_do_printf(s);
+ trace_seq_reset(s);
+}
+
+/*
+ * osnoise_print_summary - print the summary of the hist data to the output
+ */
+static void
+osnoise_print_summary(struct osnoise_params *params,
+ struct trace_instance *trace,
+ struct osnoise_hist_data *data)
+{
+ int cpu;
+
+ if (params->common.hist.no_summary)
+ return;
+
+ if (!params->common.hist.no_index)
+ trace_seq_printf(trace->seq, "count:");
+
+ for_each_monitored_cpu(cpu, data->nr_cpus, &params->common) {
+
+ if (!data->hist[cpu].count)
+ continue;
+
+ trace_seq_printf(trace->seq, "%9d ", data->hist[cpu].count);
+ }
+ trace_seq_printf(trace->seq, "\n");
+
+ if (!params->common.hist.no_index)
+ trace_seq_printf(trace->seq, "min: ");
+
+ for_each_monitored_cpu(cpu, data->nr_cpus, &params->common) {
+
+ if (!data->hist[cpu].count)
+ continue;
+
+ trace_seq_printf(trace->seq, "%9llu ", data->hist[cpu].min_sample);
+
+ }
+ trace_seq_printf(trace->seq, "\n");
+
+ if (!params->common.hist.no_index)
+ trace_seq_printf(trace->seq, "avg: ");
+
+ for_each_monitored_cpu(cpu, data->nr_cpus, &params->common) {
+
+ if (!data->hist[cpu].count)
+ continue;
+
+ if (data->hist[cpu].count)
+ trace_seq_printf(trace->seq, "%9.2f ",
+ ((double) data->hist[cpu].sum_sample) / data->hist[cpu].count);
+ else
+ trace_seq_printf(trace->seq, " - ");
+ }
+ trace_seq_printf(trace->seq, "\n");
+
+ if (!params->common.hist.no_index)
+ trace_seq_printf(trace->seq, "max: ");
+
+ for_each_monitored_cpu(cpu, data->nr_cpus, &params->common) {
+
+ if (!data->hist[cpu].count)
+ continue;
+
+ trace_seq_printf(trace->seq, "%9llu ", data->hist[cpu].max_sample);
+
+ }
+ trace_seq_printf(trace->seq, "\n");
+ trace_seq_do_printf(trace->seq);
+ trace_seq_reset(trace->seq);
+}
+
+/*
+ * osnoise_print_stats - print data for all CPUs
+ */
+static void
+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;
+
+ osnoise_hist_header(tool);
+
+ for (bucket = 0; bucket < data->entries; bucket++) {
+ total = 0;
+
+ if (!params->common.hist.no_index)
+ trace_seq_printf(trace->seq, "%-6d",
+ bucket * data->bucket_size);
+
+ for_each_monitored_cpu(cpu, data->nr_cpus, &params->common) {
+
+ if (!data->hist[cpu].count)
+ continue;
+
+ total += data->hist[cpu].samples[bucket];
+ trace_seq_printf(trace->seq, "%9d ", data->hist[cpu].samples[bucket]);
+ }
+
+ 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 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_each_monitored_cpu(cpu, data->nr_cpus, &params->common) {
+
+ if (!data->hist[cpu].count)
+ continue;
+
+ trace_seq_printf(trace->seq, "%9d ",
+ data->hist[cpu].samples[data->entries]);
+ }
+ trace_seq_printf(trace->seq, "\n");
+ trace_seq_do_printf(trace->seq);
+ 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(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>] \\",
+ " [-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]",
+ "",
+ " -h/--help: print this menu",
+ " -a/--auto: set automatic trace mode, stopping the session if argument in us sample is hit",
+ " -p/--period us: osnoise period in us",
+ " -r/--runtime us: osnoise runtime in us",
+ " -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",
+ " -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",
+ " -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]",
+ " -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",
+ " -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",
+ " --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,
+ };
+
+ 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(EXIT_SUCCESS);
+}
+
+/*
+ * osnoise_hist_parse_args - allocs, parse and fill the cmd line parameters
+ */
+static struct common_params
+*osnoise_hist_parse_args(int argc, char *argv[])
+{
+ 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(&params->common.threshold_actions);
+ actions_init(&params->common.end_actions);
+
+ /* display data in microseconds */
+ params->common.output_divisor = 1000;
+ params->common.hist.bucket_size = 1;
+ params->common.hist.entries = 256;
+
+ while (1) {
+ static struct option long_options[] = {
+ {"auto", required_argument, 0, 'a'},
+ {"bucket-size", required_argument, 0, 'b'},
+ {"entries", required_argument, 0, 'E'},
+ {"cpus", required_argument, 0, 'c'},
+ {"cgroup", optional_argument, 0, 'C'},
+ {"debug", no_argument, 0, 'D'},
+ {"duration", required_argument, 0, 'd'},
+ {"house-keeping", required_argument, 0, 'H'},
+ {"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'},
+ {"event", required_argument, 0, 'e'},
+ {"threshold", required_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'},
+ {"trigger", required_argument, 0, '4'},
+ {"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}
+ };
+
+ 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, NULL);
+
+ /* detect the end of the options. */
+ if (c == -1)
+ break;
+
+ switch (c) {
+ case 'a':
+ /* set sample stop to auto_thresh */
+ params->common.stop_us = get_llong_from_str(optarg);
+
+ /* set sample threshold to 1 */
+ params->threshold = 1;
+
+ /* set trace */
+ if (!trace_output)
+ trace_output = "osnoise_trace.txt";
+
+ break;
+ case 'b':
+ 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, &params->common.monitored_cpus);
+ if (retval)
+ fatal("Invalid -c cpu list");
+ params->common.cpus = optarg;
+ break;
+ case 'C':
+ params->common.cgroup = 1;
+ params->common.cgroup_name = parse_optional_arg(argc, argv);
+ break;
+ case 'D':
+ config_debug = 1;
+ break;
+ case 'd':
+ 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)
+ fatal("Error alloc trace event");
+
+ if (params->common.events)
+ tevent->next = params->common.events;
+
+ params->common.events = tevent;
+ break;
+ case 'E':
+ 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();
+ break;
+ case 'H':
+ params->common.hk_cpus = 1;
+ retval = parse_cpu_set(optarg, &params->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)
+ fatal("Period longer than 10 s");
+ break;
+ case 'P':
+ retval = parse_prio(optarg, &params->common.sched_param);
+ if (retval == -1)
+ fatal("Invalid -P priority");
+ params->common.set_sched = 1;
+ break;
+ case 'r':
+ params->runtime = get_llong_from_str(optarg);
+ if (params->runtime < 100)
+ fatal("Runtime shorter than 100 us");
+ break;
+ case 's':
+ params->common.stop_us = get_llong_from_str(optarg);
+ break;
+ case 'S':
+ params->common.stop_total_us = get_llong_from_str(optarg);
+ break;
+ case 'T':
+ params->threshold = get_llong_from_str(optarg);
+ break;
+ case 't':
+ trace_output = parse_optional_arg(argc, argv);
+ if (!trace_output)
+ trace_output = "osnoise_trace.txt";
+ break;
+ case '0': /* no header */
+ params->common.hist.no_header = 1;
+ break;
+ case '1': /* no summary */
+ params->common.hist.no_summary = 1;
+ break;
+ case '2': /* no index */
+ params->common.hist.no_index = 1;
+ break;
+ case '3': /* with zeros */
+ params->common.hist.with_zeros = 1;
+ break;
+ case '4': /* trigger */
+ if (params->common.events) {
+ retval = trace_event_add_trigger(params->common.events, optarg);
+ if (retval)
+ fatal("Error adding trigger %s", optarg);
+ } else {
+ fatal("--trigger requires a previous -e");
+ }
+ break;
+ case '5': /* filter */
+ if (params->common.events) {
+ retval = trace_event_add_filter(params->common.events, optarg);
+ if (retval)
+ fatal("Error adding filter %s", optarg);
+ } else {
+ fatal("--filter requires a previous -e");
+ }
+ break;
+ case '6':
+ params->common.warmup = get_llong_from_str(optarg);
+ break;
+ case '7':
+ params->common.buffer_size = get_llong_from_str(optarg);
+ break;
+ case '8':
+ retval = actions_parse(&params->common.threshold_actions, optarg,
+ "osnoise_trace.txt");
+ if (retval)
+ fatal("Invalid action %s", optarg);
+ break;
+ case '9':
+ retval = actions_parse(&params->common.end_actions, optarg,
+ "osnoise_trace.txt");
+ if (retval)
+ fatal("Invalid action %s", optarg);
+ break;
+ default:
+ fatal("Invalid option");
+ }
+ }
+
+ if (trace_output)
+ actions_add_trace_output(&params->common.threshold_actions, trace_output);
+
+ if (geteuid())
+ fatal("rtla needs root permission");
+
+ 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->common;
+}
+
+/*
+ * osnoise_hist_apply_config - apply the hist configs to the initialized tool
+ */
+static int
+osnoise_hist_apply_config(struct osnoise_tool *tool)
+{
+ 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 common_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->hist.entries,
+ params->hist.bucket_size);
+ if (!tool->data)
+ goto out_err;
+
+ return tool;
+
+out_err:
+ osnoise_destroy_tool(tool);
+ return NULL;
+}
+
+static int osnoise_hist_enable(struct osnoise_tool *tool)
+{
+ int retval;
+
+ retval = osnoise_init_trace_hist(tool);
+ if (retval)
+ return retval;
+
+ return osnoise_enable(tool);
+}
+
+static int osnoise_hist_main_loop(struct osnoise_tool *tool)
+{
+ int retval;
+
+ retval = hist_main_loop(tool);
+ osnoise_read_trace_hist(tool);
+
+ 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,
+};
generated by cgit (git 2.34.1) at 2025-12-25 14:50:26 +0000