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-rw-r--r--tools/tracing/rtla/src/osnoise_hist.c90
1 files changed, 76 insertions, 14 deletions
diff --git a/tools/tracing/rtla/src/osnoise_hist.c b/tools/tracing/rtla/src/osnoise_hist.c
index 13e1233690bb..8f81fa007364 100644
--- a/tools/tracing/rtla/src/osnoise_hist.c
+++ b/tools/tracing/rtla/src/osnoise_hist.c
@@ -3,6 +3,7 @@
* 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>
@@ -11,14 +12,16 @@
#include <errno.h>
#include <stdio.h>
#include <time.h>
+#include <sched.h>
#include "utils.h"
#include "osnoise.h"
struct osnoise_hist_params {
char *cpus;
- char *monitored_cpus;
+ cpu_set_t monitored_cpus;
char *trace_output;
+ char *cgroup_name;
unsigned long long runtime;
unsigned long long period;
long long threshold;
@@ -28,6 +31,9 @@ struct osnoise_hist_params {
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;
@@ -268,7 +274,7 @@ static void osnoise_hist_header(struct osnoise_tool *tool)
trace_seq_printf(s, "Index");
for (cpu = 0; cpu < data->nr_cpus; cpu++) {
- if (params->cpus && !params->monitored_cpus[cpu])
+ if (params->cpus && !CPU_ISSET(cpu, &params->monitored_cpus))
continue;
if (!data->hist[cpu].count)
@@ -299,7 +305,7 @@ osnoise_print_summary(struct osnoise_hist_params *params,
trace_seq_printf(trace->seq, "count:");
for (cpu = 0; cpu < data->nr_cpus; cpu++) {
- if (params->cpus && !params->monitored_cpus[cpu])
+ if (params->cpus && !CPU_ISSET(cpu, &params->monitored_cpus))
continue;
if (!data->hist[cpu].count)
@@ -313,7 +319,7 @@ osnoise_print_summary(struct osnoise_hist_params *params,
trace_seq_printf(trace->seq, "min: ");
for (cpu = 0; cpu < data->nr_cpus; cpu++) {
- if (params->cpus && !params->monitored_cpus[cpu])
+ if (params->cpus && !CPU_ISSET(cpu, &params->monitored_cpus))
continue;
if (!data->hist[cpu].count)
@@ -328,7 +334,7 @@ osnoise_print_summary(struct osnoise_hist_params *params,
trace_seq_printf(trace->seq, "avg: ");
for (cpu = 0; cpu < data->nr_cpus; cpu++) {
- if (params->cpus && !params->monitored_cpus[cpu])
+ if (params->cpus && !CPU_ISSET(cpu, &params->monitored_cpus))
continue;
if (!data->hist[cpu].count)
@@ -346,7 +352,7 @@ osnoise_print_summary(struct osnoise_hist_params *params,
trace_seq_printf(trace->seq, "max: ");
for (cpu = 0; cpu < data->nr_cpus; cpu++) {
- if (params->cpus && !params->monitored_cpus[cpu])
+ if (params->cpus && !CPU_ISSET(cpu, &params->monitored_cpus))
continue;
if (!data->hist[cpu].count)
@@ -381,7 +387,7 @@ osnoise_print_stats(struct osnoise_hist_params *params, struct osnoise_tool *too
bucket * data->bucket_size);
for (cpu = 0; cpu < data->nr_cpus; cpu++) {
- if (params->cpus && !params->monitored_cpus[cpu])
+ if (params->cpus && !CPU_ISSET(cpu, &params->monitored_cpus))
continue;
if (!data->hist[cpu].count)
@@ -405,7 +411,7 @@ osnoise_print_stats(struct osnoise_hist_params *params, struct osnoise_tool *too
trace_seq_printf(trace->seq, "over: ");
for (cpu = 0; cpu < data->nr_cpus; cpu++) {
- if (params->cpus && !params->monitored_cpus[cpu])
+ if (params->cpus && !CPU_ISSET(cpu, &params->monitored_cpus))
continue;
if (!data->hist[cpu].count)
@@ -432,8 +438,8 @@ static void osnoise_hist_usage(char *usage)
"",
" 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] [-P priority] [-b N] [-E N] [--no-header] [--no-summary] [--no-index] \\",
- " [--with-zeros]",
+ " [-c cpu-list] [-H cpu-list] [-P priority] [-b N] [-E N] [--no-header] [--no-summary] \\",
+ " [--no-index] [--with-zeros] [-C[=cgroup_name]]",
"",
" -h/--help: print this menu",
" -a/--auto: set automatic trace mode, stopping the session if argument in us sample is hit",
@@ -443,6 +449,8 @@ static void osnoise_hist_usage(char *usage)
" -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]",
@@ -501,8 +509,10 @@ static struct osnoise_hist_params
{"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'},
@@ -524,7 +534,7 @@ static struct osnoise_hist_params
/* getopt_long stores the option index here. */
int option_index = 0;
- c = getopt_long(argc, argv, "a:c:b:d:e:E:Dhp:P:r:s:S:t::T:01234:5:",
+ c = getopt_long(argc, argv, "a:c:C::b:d:e:E:DhH:p:P:r:s:S:t::T:01234:5:",
long_options, &option_index);
/* detect the end of the options. */
@@ -549,11 +559,21 @@ static struct osnoise_hist_params
osnoise_hist_usage("Bucket size needs to be > 0 and <= 1000000\n");
break;
case 'c':
- retval = parse_cpu_list(optarg, &params->monitored_cpus);
+ retval = parse_cpu_set(optarg, &params->monitored_cpus);
if (retval)
osnoise_hist_usage("\nInvalid -c cpu list\n");
params->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;
+ }
+ break;
case 'D':
config_debug = 1;
break;
@@ -583,6 +603,14 @@ static struct osnoise_hist_params
case '?':
osnoise_hist_usage(NULL);
break;
+ case 'H':
+ params->hk_cpus = 1;
+ retval = parse_cpu_set(optarg, &params->hk_cpu_set);
+ if (retval) {
+ err_msg("Error parsing house keeping CPUs\n");
+ exit(EXIT_FAILURE);
+ }
+ break;
case 'p':
params->period = get_llong_from_str(optarg);
if (params->period > 10000000)
@@ -718,6 +746,24 @@ osnoise_hist_apply_config(struct osnoise_tool *tool, struct osnoise_hist_params
}
}
+ if (params->hk_cpus) {
+ retval = sched_setaffinity(getpid(), sizeof(params->hk_cpu_set),
+ &params->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(&params->monitored_cpus);
+ }
+
return 0;
out_err:
@@ -816,7 +862,13 @@ int osnoise_hist_main(int argc, char *argv[])
}
}
- trace_instance_start(trace);
+ 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");
@@ -831,9 +883,19 @@ int osnoise_hist_main(int argc, char *argv[])
goto out_hist;
}
- trace_instance_start(&record->trace);
}
+ /*
+ * 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);
+
tool->start_time = time(NULL);
osnoise_hist_set_signals(params);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-29 02:56:09 +0000