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// SPDX-License-Identifier: GPL-2.0
/*
* builtin-kwork.c
*
* Copyright (c) 2022 Huawei Inc, Yang Jihong <yangjihong1@huawei.com>
*/
#include "builtin.h"
#include "util/data.h"
#include "util/kwork.h"
#include "util/debug.h"
#include "util/symbol.h"
#include "util/thread.h"
#include "util/string2.h"
#include "util/callchain.h"
#include "util/evsel_fprintf.h"
#include <subcmd/pager.h>
#include <subcmd/parse-options.h>
#include <errno.h>
#include <inttypes.h>
#include <linux/err.h>
#include <linux/time64.h>
#include <linux/zalloc.h>
const struct evsel_str_handler irq_tp_handlers[] = {
{ "irq:irq_handler_entry", NULL, },
{ "irq:irq_handler_exit", NULL, },
};
static struct kwork_class kwork_irq = {
.name = "irq",
.type = KWORK_CLASS_IRQ,
.nr_tracepoints = 2,
.tp_handlers = irq_tp_handlers,
};
const struct evsel_str_handler softirq_tp_handlers[] = {
{ "irq:softirq_raise", NULL, },
{ "irq:softirq_entry", NULL, },
{ "irq:softirq_exit", NULL, },
};
static struct kwork_class kwork_softirq = {
.name = "softirq",
.type = KWORK_CLASS_SOFTIRQ,
.nr_tracepoints = 3,
.tp_handlers = softirq_tp_handlers,
};
const struct evsel_str_handler workqueue_tp_handlers[] = {
{ "workqueue:workqueue_activate_work", NULL, },
{ "workqueue:workqueue_execute_start", NULL, },
{ "workqueue:workqueue_execute_end", NULL, },
};
static struct kwork_class kwork_workqueue = {
.name = "workqueue",
.type = KWORK_CLASS_WORKQUEUE,
.nr_tracepoints = 3,
.tp_handlers = workqueue_tp_handlers,
};
static struct kwork_class *kwork_class_supported_list[KWORK_CLASS_MAX] = {
[KWORK_CLASS_IRQ] = &kwork_irq,
[KWORK_CLASS_SOFTIRQ] = &kwork_softirq,
[KWORK_CLASS_WORKQUEUE] = &kwork_workqueue,
};
static void setup_event_list(struct perf_kwork *kwork,
const struct option *options,
const char * const usage_msg[])
{
int i;
struct kwork_class *class;
char *tmp, *tok, *str;
if (kwork->event_list_str == NULL)
goto null_event_list_str;
str = strdup(kwork->event_list_str);
for (tok = strtok_r(str, ", ", &tmp);
tok; tok = strtok_r(NULL, ", ", &tmp)) {
for (i = 0; i < KWORK_CLASS_MAX; i++) {
class = kwork_class_supported_list[i];
if (strcmp(tok, class->name) == 0) {
list_add_tail(&class->list, &kwork->class_list);
break;
}
}
if (i == KWORK_CLASS_MAX) {
usage_with_options_msg(usage_msg, options,
"Unknown --event key: `%s'", tok);
}
}
free(str);
null_event_list_str:
/*
* config all kwork events if not specified
*/
if (list_empty(&kwork->class_list)) {
for (i = 0; i < KWORK_CLASS_MAX; i++) {
list_add_tail(&kwork_class_supported_list[i]->list,
&kwork->class_list);
}
}
pr_debug("Config event list:");
list_for_each_entry(class, &kwork->class_list, list)
pr_debug(" %s", class->name);
pr_debug("\n");
}
static int perf_kwork__record(struct perf_kwork *kwork,
int argc, const char **argv)
{
const char **rec_argv;
unsigned int rec_argc, i, j;
struct kwork_class *class;
const char *const record_args[] = {
"record",
"-a",
"-R",
"-m", "1024",
"-c", "1",
};
rec_argc = ARRAY_SIZE(record_args) + argc - 1;
list_for_each_entry(class, &kwork->class_list, list)
rec_argc += 2 * class->nr_tracepoints;
rec_argv = calloc(rec_argc + 1, sizeof(char *));
if (rec_argv == NULL)
return -ENOMEM;
for (i = 0; i < ARRAY_SIZE(record_args); i++)
rec_argv[i] = strdup(record_args[i]);
list_for_each_entry(class, &kwork->class_list, list) {
for (j = 0; j < class->nr_tracepoints; j++) {
rec_argv[i++] = strdup("-e");
rec_argv[i++] = strdup(class->tp_handlers[j].name);
}
}
for (j = 1; j < (unsigned int)argc; j++, i++)
rec_argv[i] = argv[j];
BUG_ON(i != rec_argc);
pr_debug("record comm: ");
for (j = 0; j < rec_argc; j++)
pr_debug("%s ", rec_argv[j]);
pr_debug("\n");
return cmd_record(i, rec_argv);
}
int cmd_kwork(int argc, const char **argv)
{
static struct perf_kwork kwork = {
.class_list = LIST_HEAD_INIT(kwork.class_list),
.force = false,
.event_list_str = NULL,
};
const struct option kwork_options[] = {
OPT_INCR('v', "verbose", &verbose,
"be more verbose (show symbol address, etc)"),
OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
"dump raw trace in ASCII"),
OPT_STRING('k', "kwork", &kwork.event_list_str, "kwork",
"list of kwork to profile (irq, softirq, workqueue, etc)"),
OPT_BOOLEAN('f', "force", &kwork.force, "don't complain, do it"),
OPT_END()
};
const char *kwork_usage[] = {
NULL,
NULL
};
const char *const kwork_subcommands[] = {
"record", NULL
};
argc = parse_options_subcommand(argc, argv, kwork_options,
kwork_subcommands, kwork_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
if (!argc)
usage_with_options(kwork_usage, kwork_options);
setup_event_list(&kwork, kwork_options, kwork_usage);
if (strlen(argv[0]) > 2 && strstarts("record", argv[0]))
return perf_kwork__record(&kwork, argc, argv);
else
usage_with_options(kwork_usage, kwork_options);
return 0;
}
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