summaryrefslogtreecommitdiff
path: root/tools/tracing/rtla/src/osnoise_top.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/tracing/rtla/src/osnoise_top.c')
-rw-r--r--tools/tracing/rtla/src/osnoise_top.c580
1 files changed, 580 insertions, 0 deletions
diff --git a/tools/tracing/rtla/src/osnoise_top.c b/tools/tracing/rtla/src/osnoise_top.c
new file mode 100644
index 000000000000..04c699bdd736
--- /dev/null
+++ b/tools/tracing/rtla/src/osnoise_top.c
@@ -0,0 +1,580 @@
+// 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 <stdio.h>
+#include <time.h>
+
+#include "osnoise.h"
+
+struct osnoise_top_cpu {
+ unsigned long long sum_runtime;
+ unsigned long long sum_noise;
+ unsigned long long max_noise;
+ unsigned long long max_sample;
+
+ unsigned long long hw_count;
+ unsigned long long nmi_count;
+ unsigned long long irq_count;
+ unsigned long long softirq_count;
+ unsigned long long thread_count;
+
+ int sum_cycles;
+};
+
+struct osnoise_top_data {
+ struct osnoise_top_cpu *cpu_data;
+ int nr_cpus;
+};
+
+/*
+ * osnoise_free_top - free runtime data
+ */
+static void osnoise_free_top(struct osnoise_top_data *data)
+{
+ free(data->cpu_data);
+ free(data);
+}
+
+static void osnoise_free_top_tool(struct osnoise_tool *tool)
+{
+ osnoise_free_top(tool->data);
+}
+
+/*
+ * osnoise_alloc_histogram - alloc runtime data
+ */
+static struct osnoise_top_data *osnoise_alloc_top(int nr_cpus)
+{
+ struct osnoise_top_data *data;
+
+ data = calloc(1, sizeof(*data));
+ if (!data)
+ return NULL;
+
+ data->nr_cpus = nr_cpus;
+
+ /* one set of histograms per CPU */
+ data->cpu_data = calloc(1, sizeof(*data->cpu_data) * nr_cpus);
+ if (!data->cpu_data)
+ goto cleanup;
+
+ return data;
+
+cleanup:
+ osnoise_free_top(data);
+ return NULL;
+}
+
+/*
+ * osnoise_top_handler - this is the handler for osnoise tracer events
+ */
+static int
+osnoise_top_handler(struct trace_seq *s, struct tep_record *record,
+ struct tep_event *event, void *context)
+{
+ struct trace_instance *trace = context;
+ struct osnoise_tool *tool;
+ unsigned long long val;
+ struct osnoise_top_cpu *cpu_data;
+ struct osnoise_top_data *data;
+ int cpu = record->cpu;
+
+ tool = container_of(trace, struct osnoise_tool, trace);
+
+ data = tool->data;
+ cpu_data = &data->cpu_data[cpu];
+
+ cpu_data->sum_cycles++;
+
+ tep_get_field_val(s, event, "runtime", record, &val, 1);
+ update_sum(&cpu_data->sum_runtime, &val);
+
+ tep_get_field_val(s, event, "noise", record, &val, 1);
+ update_max(&cpu_data->max_noise, &val);
+ update_sum(&cpu_data->sum_noise, &val);
+
+ tep_get_field_val(s, event, "max_sample", record, &val, 1);
+ update_max(&cpu_data->max_sample, &val);
+
+ tep_get_field_val(s, event, "hw_count", record, &val, 1);
+ update_sum(&cpu_data->hw_count, &val);
+
+ tep_get_field_val(s, event, "nmi_count", record, &val, 1);
+ update_sum(&cpu_data->nmi_count, &val);
+
+ tep_get_field_val(s, event, "irq_count", record, &val, 1);
+ update_sum(&cpu_data->irq_count, &val);
+
+ tep_get_field_val(s, event, "softirq_count", record, &val, 1);
+ update_sum(&cpu_data->softirq_count, &val);
+
+ tep_get_field_val(s, event, "thread_count", record, &val, 1);
+ update_sum(&cpu_data->thread_count, &val);
+
+ return 0;
+}
+
+/*
+ * osnoise_top_header - print the header of the tool output
+ */
+static void osnoise_top_header(struct osnoise_tool *top)
+{
+ struct osnoise_params *params = to_osnoise_params(top->params);
+ struct trace_seq *s = top->trace.seq;
+ bool pretty = params->common.pretty_output;
+ char duration[26];
+
+ get_duration(top->start_time, duration, sizeof(duration));
+
+ if (pretty)
+ trace_seq_printf(s, "\033[2;37;40m");
+
+ trace_seq_printf(s, " ");
+
+ if (params->mode == MODE_OSNOISE) {
+ trace_seq_printf(s, "Operating System Noise");
+ trace_seq_printf(s, " ");
+ } else if (params->mode == MODE_HWNOISE) {
+ trace_seq_printf(s, "Hardware-related Noise");
+ }
+
+ trace_seq_printf(s, " ");
+
+ if (pretty)
+ trace_seq_printf(s, "\033[0;0;0m");
+ trace_seq_printf(s, "\n");
+
+ trace_seq_printf(s, "duration: %9s | time is in us\n", duration);
+
+ if (pretty)
+ trace_seq_printf(s, "\033[2;30;47m");
+
+ trace_seq_printf(s, "CPU Period Runtime ");
+ trace_seq_printf(s, " Noise ");
+ trace_seq_printf(s, " %% CPU Aval ");
+ trace_seq_printf(s, " Max Noise Max Single ");
+ trace_seq_printf(s, " HW NMI");
+
+ if (params->mode == MODE_HWNOISE)
+ goto eol;
+
+ trace_seq_printf(s, " IRQ Softirq Thread");
+
+eol:
+ if (pretty)
+ trace_seq_printf(s, "\033[0;0;0m");
+ trace_seq_printf(s, "\n");
+}
+
+/*
+ * clear_terminal - clears the output terminal
+ */
+static void clear_terminal(struct trace_seq *seq)
+{
+ if (!config_debug)
+ trace_seq_printf(seq, "\033c");
+}
+
+/*
+ * osnoise_top_print - prints the output of a given CPU
+ */
+static void osnoise_top_print(struct osnoise_tool *tool, int cpu)
+{
+ struct osnoise_params *params = to_osnoise_params(tool->params);
+ struct trace_seq *s = tool->trace.seq;
+ struct osnoise_top_cpu *cpu_data;
+ struct osnoise_top_data *data;
+ int percentage;
+ int decimal;
+
+ data = tool->data;
+ cpu_data = &data->cpu_data[cpu];
+
+ if (!cpu_data->sum_runtime)
+ return;
+
+ percentage = ((cpu_data->sum_runtime - cpu_data->sum_noise) * 10000000)
+ / cpu_data->sum_runtime;
+ decimal = percentage % 100000;
+ percentage = percentage / 100000;
+
+ trace_seq_printf(s, "%3d #%-6d %12llu ", cpu, cpu_data->sum_cycles, cpu_data->sum_runtime);
+ trace_seq_printf(s, "%12llu ", cpu_data->sum_noise);
+ trace_seq_printf(s, " %3d.%05d", percentage, decimal);
+ trace_seq_printf(s, "%12llu %12llu", cpu_data->max_noise, cpu_data->max_sample);
+
+ trace_seq_printf(s, "%12llu ", cpu_data->hw_count);
+ trace_seq_printf(s, "%12llu ", cpu_data->nmi_count);
+
+ if (params->mode == MODE_HWNOISE) {
+ trace_seq_printf(s, "\n");
+ return;
+ }
+
+ trace_seq_printf(s, "%12llu ", cpu_data->irq_count);
+ trace_seq_printf(s, "%12llu ", cpu_data->softirq_count);
+ trace_seq_printf(s, "%12llu\n", cpu_data->thread_count);
+}
+
+/*
+ * osnoise_print_stats - print data for all cpus
+ */
+static void
+osnoise_print_stats(struct osnoise_tool *top)
+{
+ struct osnoise_params *params = to_osnoise_params(top->params);
+ struct trace_instance *trace = &top->trace;
+ static int nr_cpus = -1;
+ int i;
+
+ if (nr_cpus == -1)
+ nr_cpus = sysconf(_SC_NPROCESSORS_CONF);
+
+ if (!params->common.quiet)
+ clear_terminal(trace->seq);
+
+ osnoise_top_header(top);
+
+ for_each_monitored_cpu(i, nr_cpus, &params->common) {
+ osnoise_top_print(top, i);
+ }
+
+ trace_seq_do_printf(trace->seq);
+ trace_seq_reset(trace->seq);
+ osnoise_report_missed_events(top);
+}
+
+/*
+ * osnoise_top_usage - prints osnoise top usage message
+ */
+static void osnoise_top_usage(struct osnoise_params *params)
+{
+ int i;
+
+ static const char * const msg[] = {
+ " [-h] [-q] [-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] [-C [cgroup_name]] [--warm-up s]",
+ "",
+ " -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",
+ " -q/--quiet print only a summary at the end",
+ " -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 s: 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: define action to be executed at measurement end, multiple are allowed",
+ NULL,
+ };
+
+ if (params->mode == MODE_OSNOISE) {
+ fprintf(stderr,
+ "rtla osnoise top: a per-cpu summary of the OS noise (version %s)\n",
+ VERSION);
+
+ fprintf(stderr, " usage: rtla osnoise [top]");
+ }
+
+ if (params->mode == MODE_HWNOISE) {
+ fprintf(stderr,
+ "rtla hwnoise: a summary of hardware-related noise (version %s)\n",
+ VERSION);
+
+ fprintf(stderr, " usage: rtla hwnoise");
+ }
+
+ for (i = 0; msg[i]; i++)
+ fprintf(stderr, "%s\n", msg[i]);
+
+ exit(EXIT_SUCCESS);
+}
+
+/*
+ * osnoise_top_parse_args - allocs, parse and fill the cmd line parameters
+ */
+struct common_params *osnoise_top_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);
+
+ if (strcmp(argv[0], "hwnoise") == 0) {
+ params->mode = MODE_HWNOISE;
+ /*
+ * Reduce CPU usage for 75% to avoid killing the system.
+ */
+ params->runtime = 750000;
+ params->period = 1000000;
+ }
+
+ while (1) {
+ static struct option long_options[] = {
+ {"auto", required_argument, 0, 'a'},
+ {"cpus", required_argument, 0, 'c'},
+ {"cgroup", optional_argument, 0, 'C'},
+ {"debug", no_argument, 0, 'D'},
+ {"duration", required_argument, 0, 'd'},
+ {"event", required_argument, 0, 'e'},
+ {"house-keeping", required_argument, 0, 'H'},
+ {"help", no_argument, 0, 'h'},
+ {"period", required_argument, 0, 'p'},
+ {"priority", required_argument, 0, 'P'},
+ {"quiet", no_argument, 0, 'q'},
+ {"runtime", required_argument, 0, 'r'},
+ {"stop", required_argument, 0, 's'},
+ {"stop-total", required_argument, 0, 'S'},
+ {"threshold", required_argument, 0, 'T'},
+ {"trace", optional_argument, 0, 't'},
+ {"trigger", required_argument, 0, '0'},
+ {"filter", required_argument, 0, '1'},
+ {"warm-up", required_argument, 0, '2'},
+ {"trace-buffer-size", required_argument, 0, '3'},
+ {"on-threshold", required_argument, 0, '4'},
+ {"on-end", required_argument, 0, '5'},
+ {0, 0, 0, 0}
+ };
+
+ c = getopt_long(argc, argv, "a:c:C::d:De:hH:p:P:qr:s:S:t::T:0:1:2:3:",
+ 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 '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 'h':
+ case '?':
+ osnoise_top_usage(params);
+ 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 'q':
+ params->common.quiet = 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':
+ trace_output = parse_optional_arg(argc, argv);
+ if (!trace_output)
+ trace_output = "osnoise_trace.txt";
+ break;
+ case 'T':
+ params->threshold = get_llong_from_str(optarg);
+ break;
+ case '0': /* 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 '1': /* 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 '2':
+ params->common.warmup = get_llong_from_str(optarg);
+ break;
+ case '3':
+ params->common.buffer_size = get_llong_from_str(optarg);
+ break;
+ case '4':
+ retval = actions_parse(&params->common.threshold_actions, optarg,
+ "osnoise_trace.txt");
+ if (retval)
+ fatal("Invalid action %s", optarg);
+ break;
+ case '5':
+ 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("osnoise needs root permission");
+
+ return &params->common;
+}
+
+/*
+ * osnoise_top_apply_config - apply the top configs to the initialized tool
+ */
+static int
+osnoise_top_apply_config(struct osnoise_tool *tool)
+{
+ struct osnoise_params *params = to_osnoise_params(tool->params);
+ int retval;
+
+ retval = osnoise_apply_config(tool, params);
+ if (retval)
+ goto out_err;
+
+ if (params->mode == MODE_HWNOISE) {
+ retval = osnoise_set_irq_disable(tool->context, 1);
+ if (retval) {
+ err_msg("Failed to set OSNOISE_IRQ_DISABLE option\n");
+ goto out_err;
+ }
+ }
+
+ if (isatty(STDOUT_FILENO) && !params->common.quiet)
+ params->common.pretty_output = 1;
+
+ return 0;
+
+out_err:
+ return -1;
+}
+
+/*
+ * osnoise_init_top - initialize a osnoise top tool with parameters
+ */
+struct osnoise_tool *osnoise_init_top(struct common_params *params)
+{
+ struct osnoise_tool *tool;
+ int nr_cpus;
+
+ nr_cpus = sysconf(_SC_NPROCESSORS_CONF);
+
+ tool = osnoise_init_tool("osnoise_top");
+ if (!tool)
+ return NULL;
+
+ tool->data = osnoise_alloc_top(nr_cpus);
+ if (!tool->data) {
+ osnoise_destroy_tool(tool);
+ return NULL;
+ }
+
+ tep_register_event_handler(tool->trace.tep, -1, "ftrace", "osnoise",
+ osnoise_top_handler, NULL);
+
+ return tool;
+}
+
+struct tool_ops osnoise_top_ops = {
+ .tracer = "osnoise",
+ .comm_prefix = "osnoise/",
+ .parse_args = osnoise_top_parse_args,
+ .init_tool = osnoise_init_top,
+ .apply_config = osnoise_top_apply_config,
+ .enable = osnoise_enable,
+ .main = top_main_loop,
+ .print_stats = osnoise_print_stats,
+ .free = osnoise_free_top_tool,
+};
generated by cgit (git 2.34.1) at 2025-12-25 13:32:59 +0000