microsoft
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WSL2-Linux-Kernel
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WSL2-Linux-Kernel/tools/perf/builtin-trace.c

686 строки
18 KiB
C
Исходник Ответственный История

#include "builtin.h"
#include "util/color.h"
#include "util/evlist.h"
#include "util/machine.h"
#include "util/thread.h"
#include "util/parse-options.h"
#include "util/thread_map.h"
#include "event-parse.h"
#include <libaudit.h>
#include <stdlib.h>
static struct syscall_fmt {
const char *name;
const char *alias;
bool errmsg;
bool timeout;
} syscall_fmts[] = {
{ .name = "access", .errmsg = true, },
{ .name = "arch_prctl", .errmsg = true, .alias = "prctl", },
{ .name = "fstat", .errmsg = true, .alias = "newfstat", },
{ .name = "fstatat", .errmsg = true, .alias = "newfstatat", },
{ .name = "futex", .errmsg = true, },
{ .name = "open", .errmsg = true, },
{ .name = "poll", .errmsg = true, .timeout = true, },
{ .name = "ppoll", .errmsg = true, .timeout = true, },
{ .name = "read", .errmsg = true, },
{ .name = "recvfrom", .errmsg = true, },
{ .name = "select", .errmsg = true, .timeout = true, },
{ .name = "socket", .errmsg = true, },
{ .name = "stat", .errmsg = true, .alias = "newstat", },
};
static int syscall_fmt__cmp(const void *name, const void *fmtp)
{
const struct syscall_fmt *fmt = fmtp;
return strcmp(name, fmt->name);
}
static struct syscall_fmt *syscall_fmt__find(const char *name)
{
const int nmemb = ARRAY_SIZE(syscall_fmts);
return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
}
struct syscall {
struct event_format *tp_format;
const char *name;
struct syscall_fmt *fmt;
};
static size_t fprintf_duration(unsigned long t, FILE *fp)
{
double duration = (double)t / NSEC_PER_MSEC;
size_t printed = fprintf(fp, "(");
if (duration >= 1.0)
printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
else if (duration >= 0.01)
printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
else
printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
return printed + fprintf(stdout, "): ");
}
struct thread_trace {
u64 entry_time;
u64 exit_time;
bool entry_pending;
unsigned long nr_events;
char *entry_str;
double runtime_ms;
};
static struct thread_trace *thread_trace__new(void)
{
return zalloc(sizeof(struct thread_trace));
}
static struct thread_trace *thread__trace(struct thread *thread)
{
struct thread_trace *ttrace;
if (thread == NULL)
goto fail;
if (thread->priv == NULL)
thread->priv = thread_trace__new();
if (thread->priv == NULL)
goto fail;
ttrace = thread->priv;
++ttrace->nr_events;
return ttrace;
fail:
color_fprintf(stdout, PERF_COLOR_RED,
"WARNING: not enough memory, dropping samples!\n");
return NULL;
}
struct trace {
int audit_machine;
struct {
int max;
struct syscall *table;
} syscalls;
struct perf_record_opts opts;
struct machine host;
u64 base_time;
unsigned long nr_events;
bool sched;
bool multiple_threads;
double duration_filter;
double runtime_ms;
};
static bool trace__filter_duration(struct trace *trace, double t)
{
return t < (trace->duration_filter * NSEC_PER_MSEC);
}
static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
{
double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
return fprintf(fp, "%10.3f ", ts);
}
static bool done = false;
static void sig_handler(int sig __maybe_unused)
{
done = true;
}
static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
u64 duration, u64 tstamp, FILE *fp)
{
size_t printed = trace__fprintf_tstamp(trace, tstamp, fp);
printed += fprintf_duration(duration, fp);
if (trace->multiple_threads)
printed += fprintf(fp, "%d ", thread->pid);
return printed;
}
static int trace__process_event(struct machine *machine, union perf_event *event)
{
int ret = 0;
switch (event->header.type) {
case PERF_RECORD_LOST:
color_fprintf(stdout, PERF_COLOR_RED,
"LOST %" PRIu64 " events!\n", event->lost.lost);
ret = machine__process_lost_event(machine, event);
default:
ret = machine__process_event(machine, event);
break;
}
return ret;
}
static int trace__tool_process(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct perf_sample *sample __maybe_unused,
struct machine *machine)
{
return trace__process_event(machine, event);
}
static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist)
{
int err = symbol__init();
if (err)
return err;
machine__init(&trace->host, "", HOST_KERNEL_ID);
machine__create_kernel_maps(&trace->host);
if (perf_target__has_task(&trace->opts.target)) {
err = perf_event__synthesize_thread_map(NULL, evlist->threads,
trace__tool_process,
&trace->host);
} else {
err = perf_event__synthesize_threads(NULL, trace__tool_process,
&trace->host);
}
if (err)
symbol__exit();
return err;
}
static int trace__read_syscall_info(struct trace *trace, int id)
{
char tp_name[128];
struct syscall *sc;
const char *name = audit_syscall_to_name(id, trace->audit_machine);
if (name == NULL)
return -1;
if (id > trace->syscalls.max) {
struct syscall *nsyscalls = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
if (nsyscalls == NULL)
return -1;
if (trace->syscalls.max != -1) {
memset(nsyscalls + trace->syscalls.max + 1, 0,
(id - trace->syscalls.max) * sizeof(*sc));
} else {
memset(nsyscalls, 0, (id + 1) * sizeof(*sc));
}
trace->syscalls.table = nsyscalls;
trace->syscalls.max = id;
}
sc = trace->syscalls.table + id;
sc->name = name;
sc->fmt = syscall_fmt__find(sc->name);
snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
sc->tp_format = event_format__new("syscalls", tp_name);
if (sc->tp_format == NULL && sc->fmt && sc->fmt->alias) {
snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
sc->tp_format = event_format__new("syscalls", tp_name);
}
return sc->tp_format != NULL ? 0 : -1;
}
static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
unsigned long *args)
{
int i = 0;
size_t printed = 0;
if (sc->tp_format != NULL) {
struct format_field *field;
for (field = sc->tp_format->format.fields->next; field; field = field->next) {
printed += scnprintf(bf + printed, size - printed,
"%s%s: %ld", printed ? ", " : "",
field->name, args[i++]);
}
} else {
while (i < 6) {
printed += scnprintf(bf + printed, size - printed,
"%sarg%d: %ld",
printed ? ", " : "", i, args[i]);
++i;
}
}
return printed;
}
typedef int (*tracepoint_handler)(struct trace *trace, struct perf_evsel *evsel,
struct perf_sample *sample);
static struct syscall *trace__syscall_info(struct trace *trace,
struct perf_evsel *evsel,
struct perf_sample *sample)
{
int id = perf_evsel__intval(evsel, sample, "id");
if (id < 0) {
printf("Invalid syscall %d id, skipping...\n", id);
return NULL;
}
if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) &&
trace__read_syscall_info(trace, id))
goto out_cant_read;
if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL))
goto out_cant_read;
return &trace->syscalls.table[id];
out_cant_read:
printf("Problems reading syscall %d", id);
if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL)
printf("(%s)", trace->syscalls.table[id].name);
puts(" information");
return NULL;
}
static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
struct perf_sample *sample)
{
char *msg;
void *args;
size_t printed = 0;
struct thread *thread = machine__findnew_thread(&trace->host, sample->tid);
struct syscall *sc = trace__syscall_info(trace, evsel, sample);
struct thread_trace *ttrace = thread__trace(thread);
if (ttrace == NULL || sc == NULL)
return -1;
args = perf_evsel__rawptr(evsel, sample, "args");
if (args == NULL) {
printf("Problems reading syscall arguments\n");
return -1;
}
ttrace = thread->priv;
if (ttrace->entry_str == NULL) {
ttrace->entry_str = malloc(1024);
if (!ttrace->entry_str)
return -1;
}
ttrace->entry_time = sample->time;
msg = ttrace->entry_str;
printed += scnprintf(msg + printed, 1024 - printed, "%s(", sc->name);
printed += syscall__scnprintf_args(sc, msg + printed, 1024 - printed, args);
if (!strcmp(sc->name, "exit_group") || !strcmp(sc->name, "exit")) {
if (!trace->duration_filter) {
trace__fprintf_entry_head(trace, thread, 1, sample->time, stdout);
printf("%-70s\n", ttrace->entry_str);
}
} else
ttrace->entry_pending = true;
return 0;
}
static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
struct perf_sample *sample)
{
int ret;
u64 duration = 0;
struct thread *thread = machine__findnew_thread(&trace->host, sample->tid);
struct thread_trace *ttrace = thread__trace(thread);
struct syscall *sc = trace__syscall_info(trace, evsel, sample);
if (ttrace == NULL || sc == NULL)
return -1;
ret = perf_evsel__intval(evsel, sample, "ret");
ttrace = thread->priv;
ttrace->exit_time = sample->time;
if (ttrace->entry_time) {
duration = sample->time - ttrace->entry_time;
if (trace__filter_duration(trace, duration))
goto out;
} else if (trace->duration_filter)
goto out;
trace__fprintf_entry_head(trace, thread, duration, sample->time, stdout);
if (ttrace->entry_pending) {
printf("%-70s", ttrace->entry_str);
} else {
printf(" ... [");
color_fprintf(stdout, PERF_COLOR_YELLOW, "continued");
printf("]: %s()", sc->name);
}
if (ret < 0 && sc->fmt && sc->fmt->errmsg) {
char bf[256];
const char *emsg = strerror_r(-ret, bf, sizeof(bf)),
*e = audit_errno_to_name(-ret);
printf(") = -1 %s %s", e, emsg);
} else if (ret == 0 && sc->fmt && sc->fmt->timeout)
printf(") = 0 Timeout");
else
printf(") = %d", ret);
putchar('\n');
out:
ttrace->entry_pending = false;
return 0;
}
static int trace__sched_stat_runtime(struct trace *trace, struct perf_evsel *evsel,
struct perf_sample *sample)
{
u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
double runtime_ms = (double)runtime / NSEC_PER_MSEC;
struct thread *thread = machine__findnew_thread(&trace->host, sample->tid);
struct thread_trace *ttrace = thread__trace(thread);
if (ttrace == NULL)
goto out_dump;
ttrace->runtime_ms += runtime_ms;
trace->runtime_ms += runtime_ms;
return 0;
out_dump:
printf("%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
evsel->name,
perf_evsel__strval(evsel, sample, "comm"),
(pid_t)perf_evsel__intval(evsel, sample, "pid"),
runtime,
perf_evsel__intval(evsel, sample, "vruntime"));
return 0;
}
static int trace__run(struct trace *trace, int argc, const char **argv)
{
struct perf_evlist *evlist = perf_evlist__new();
struct perf_evsel *evsel;
int err = -1, i;
unsigned long before;
const bool forks = argc > 0;
if (evlist == NULL) {
printf("Not enough memory to run!\n");
goto out;
}
if (perf_evlist__add_newtp(evlist, "raw_syscalls", "sys_enter", trace__sys_enter) ||
perf_evlist__add_newtp(evlist, "raw_syscalls", "sys_exit", trace__sys_exit)) {
printf("Couldn't read the raw_syscalls tracepoints information!\n");
goto out_delete_evlist;
}
if (trace->sched &&
perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime",
trace__sched_stat_runtime)) {
printf("Couldn't read the sched_stat_runtime tracepoint information!\n");
goto out_delete_evlist;
}
err = perf_evlist__create_maps(evlist, &trace->opts.target);
if (err < 0) {
printf("Problems parsing the target to trace, check your options!\n");
goto out_delete_evlist;
}
err = trace__symbols_init(trace, evlist);
if (err < 0) {
printf("Problems initializing symbol libraries!\n");
goto out_delete_maps;
}
perf_evlist__config(evlist, &trace->opts);
signal(SIGCHLD, sig_handler);
signal(SIGINT, sig_handler);
if (forks) {
err = perf_evlist__prepare_workload(evlist, &trace->opts.target,
argv, false, false);
if (err < 0) {
printf("Couldn't run the workload!\n");
goto out_delete_maps;
}
}
err = perf_evlist__open(evlist);
if (err < 0) {
printf("Couldn't create the events: %s\n", strerror(errno));
goto out_delete_maps;
}
err = perf_evlist__mmap(evlist, UINT_MAX, false);
if (err < 0) {
printf("Couldn't mmap the events: %s\n", strerror(errno));
goto out_close_evlist;
}
perf_evlist__enable(evlist);
if (forks)
perf_evlist__start_workload(evlist);
trace->multiple_threads = evlist->threads->map[0] == -1 || evlist->threads->nr > 1;
again:
before = trace->nr_events;
for (i = 0; i < evlist->nr_mmaps; i++) {
union perf_event *event;
while ((event = perf_evlist__mmap_read(evlist, i)) != NULL) {
const u32 type = event->header.type;
tracepoint_handler handler;
struct perf_sample sample;
++trace->nr_events;
err = perf_evlist__parse_sample(evlist, event, &sample);
if (err) {
printf("Can't parse sample, err = %d, skipping...\n", err);
continue;
}
if (trace->base_time == 0)
trace->base_time = sample.time;
if (type != PERF_RECORD_SAMPLE) {
trace__process_event(&trace->host, event);
continue;
}
evsel = perf_evlist__id2evsel(evlist, sample.id);
if (evsel == NULL) {
printf("Unknown tp ID %" PRIu64 ", skipping...\n", sample.id);
continue;
}
if (sample.raw_data == NULL) {
printf("%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n",
perf_evsel__name(evsel), sample.tid,
sample.cpu, sample.raw_size);
continue;
}
handler = evsel->handler.func;
handler(trace, evsel, &sample);
}
}
if (trace->nr_events == before) {
if (done)
goto out_unmap_evlist;
poll(evlist->pollfd, evlist->nr_fds, -1);
}
if (done)
perf_evlist__disable(evlist);
goto again;
out_unmap_evlist:
perf_evlist__munmap(evlist);
out_close_evlist:
perf_evlist__close(evlist);
out_delete_maps:
perf_evlist__delete_maps(evlist);
out_delete_evlist:
perf_evlist__delete(evlist);
out:
return err;
}
static size_t trace__fprintf_threads_header(FILE *fp)
{
size_t printed;
printed = fprintf(fp, "\n _____________________________________________________________________\n");
printed += fprintf(fp," __) Summary of events (__\n\n");
printed += fprintf(fp," [ task - pid ] [ events ] [ ratio ] [ runtime ]\n");
printed += fprintf(fp," _____________________________________________________________________\n\n");
return printed;
}
static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
{
size_t printed = trace__fprintf_threads_header(fp);
struct rb_node *nd;
for (nd = rb_first(&trace->host.threads); nd; nd = rb_next(nd)) {
struct thread *thread = rb_entry(nd, struct thread, rb_node);
struct thread_trace *ttrace = thread->priv;
const char *color;
double ratio;
if (ttrace == NULL)
continue;
ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
color = PERF_COLOR_NORMAL;
if (ratio > 50.0)
color = PERF_COLOR_RED;
else if (ratio > 25.0)
color = PERF_COLOR_GREEN;
else if (ratio > 5.0)
color = PERF_COLOR_YELLOW;
printed += color_fprintf(fp, color, "%20s", thread->comm);
printed += fprintf(fp, " - %-5d :%11lu [", thread->pid, ttrace->nr_events);
printed += color_fprintf(fp, color, "%5.1f%%", ratio);
printed += fprintf(fp, " ] %10.3f ms\n", ttrace->runtime_ms);
}
return printed;
}
static int trace__set_duration(const struct option *opt, const char *str,
int unset __maybe_unused)
{
struct trace *trace = opt->value;
trace->duration_filter = atof(str);
return 0;
}
int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
{
const char * const trace_usage[] = {
"perf trace [<options>] [<command>]",
"perf trace [<options>] -- <command> [<options>]",
NULL
};
struct trace trace = {
.audit_machine = audit_detect_machine(),
.syscalls = {
. max = -1,
},
.opts = {
.target = {
.uid = UINT_MAX,
.uses_mmap = true,
},
.user_freq = UINT_MAX,
.user_interval = ULLONG_MAX,
.no_delay = true,
.mmap_pages = 1024,
},
};
const struct option trace_options[] = {
OPT_STRING('p', "pid", &trace.opts.target.pid, "pid",
"trace events on existing process id"),
OPT_STRING(0, "tid", &trace.opts.target.tid, "tid",
"trace events on existing thread id"),
OPT_BOOLEAN(0, "all-cpus", &trace.opts.target.system_wide,
"system-wide collection from all CPUs"),
OPT_STRING(0, "cpu", &trace.opts.target.cpu_list, "cpu",
"list of cpus to monitor"),
OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit,
"child tasks do not inherit counters"),
OPT_UINTEGER(0, "mmap-pages", &trace.opts.mmap_pages,
"number of mmap data pages"),
OPT_STRING(0, "uid", &trace.opts.target.uid_str, "user",
"user to profile"),
OPT_CALLBACK(0, "duration", &trace, "float",
"show only events with duration > N.M ms",
trace__set_duration),
OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
OPT_END()
};
int err;
char bf[BUFSIZ];
argc = parse_options(argc, argv, trace_options, trace_usage, 0);
err = perf_target__validate(&trace.opts.target);
if (err) {
perf_target__strerror(&trace.opts.target, err, bf, sizeof(bf));
printf("%s", bf);
return err;
}
err = perf_target__parse_uid(&trace.opts.target);
if (err) {
perf_target__strerror(&trace.opts.target, err, bf, sizeof(bf));
printf("%s", bf);
return err;
}
if (!argc && perf_target__none(&trace.opts.target))
trace.opts.target.system_wide = true;
err = trace__run(&trace, argc, argv);
if (trace.sched && !err)
trace__fprintf_thread_summary(&trace, stdout);
return err;
}
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