765 lines
20 KiB
C
765 lines
20 KiB
C
#include <traceevent/event-parse.h>
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#include "builtin.h"
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#include "util/color.h"
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#include "util/evlist.h"
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#include "util/machine.h"
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#include "util/thread.h"
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#include "util/parse-options.h"
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#include "util/strlist.h"
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#include "util/thread_map.h"
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#include <libaudit.h>
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#include <stdlib.h>
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static struct syscall_fmt {
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const char *name;
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const char *alias;
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bool errmsg;
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bool timeout;
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} syscall_fmts[] = {
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{ .name = "access", .errmsg = true, },
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{ .name = "arch_prctl", .errmsg = true, .alias = "prctl", },
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{ .name = "connect", .errmsg = true, },
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{ .name = "fstat", .errmsg = true, .alias = "newfstat", },
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{ .name = "fstatat", .errmsg = true, .alias = "newfstatat", },
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{ .name = "futex", .errmsg = true, },
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{ .name = "open", .errmsg = true, },
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{ .name = "poll", .errmsg = true, .timeout = true, },
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{ .name = "ppoll", .errmsg = true, .timeout = true, },
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{ .name = "read", .errmsg = true, },
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{ .name = "recvfrom", .errmsg = true, },
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{ .name = "select", .errmsg = true, .timeout = true, },
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{ .name = "socket", .errmsg = true, },
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{ .name = "stat", .errmsg = true, .alias = "newstat", },
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};
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static int syscall_fmt__cmp(const void *name, const void *fmtp)
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{
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const struct syscall_fmt *fmt = fmtp;
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return strcmp(name, fmt->name);
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}
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static struct syscall_fmt *syscall_fmt__find(const char *name)
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{
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const int nmemb = ARRAY_SIZE(syscall_fmts);
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return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp);
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}
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struct syscall {
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struct event_format *tp_format;
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const char *name;
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bool filtered;
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struct syscall_fmt *fmt;
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};
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static size_t fprintf_duration(unsigned long t, FILE *fp)
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{
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double duration = (double)t / NSEC_PER_MSEC;
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size_t printed = fprintf(fp, "(");
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if (duration >= 1.0)
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printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration);
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else if (duration >= 0.01)
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printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration);
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else
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printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration);
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return printed + fprintf(fp, "): ");
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}
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struct thread_trace {
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u64 entry_time;
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u64 exit_time;
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bool entry_pending;
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unsigned long nr_events;
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char *entry_str;
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double runtime_ms;
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};
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static struct thread_trace *thread_trace__new(void)
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{
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return zalloc(sizeof(struct thread_trace));
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}
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static struct thread_trace *thread__trace(struct thread *thread, FILE *fp)
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{
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struct thread_trace *ttrace;
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if (thread == NULL)
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goto fail;
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if (thread->priv == NULL)
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thread->priv = thread_trace__new();
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if (thread->priv == NULL)
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goto fail;
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ttrace = thread->priv;
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++ttrace->nr_events;
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return ttrace;
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fail:
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color_fprintf(fp, PERF_COLOR_RED,
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"WARNING: not enough memory, dropping samples!\n");
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return NULL;
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}
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struct trace {
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struct perf_tool tool;
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int audit_machine;
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struct {
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int max;
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struct syscall *table;
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} syscalls;
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struct perf_record_opts opts;
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struct machine host;
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u64 base_time;
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FILE *output;
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struct strlist *ev_qualifier;
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unsigned long nr_events;
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bool sched;
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bool multiple_threads;
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double duration_filter;
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double runtime_ms;
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};
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static bool trace__filter_duration(struct trace *trace, double t)
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{
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return t < (trace->duration_filter * NSEC_PER_MSEC);
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}
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static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
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{
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double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
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return fprintf(fp, "%10.3f ", ts);
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}
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static bool done = false;
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static void sig_handler(int sig __maybe_unused)
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{
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done = true;
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}
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static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread,
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u64 duration, u64 tstamp, FILE *fp)
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{
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size_t printed = trace__fprintf_tstamp(trace, tstamp, fp);
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printed += fprintf_duration(duration, fp);
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if (trace->multiple_threads)
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printed += fprintf(fp, "%d ", thread->tid);
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return printed;
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}
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static int trace__process_event(struct trace *trace, struct machine *machine,
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union perf_event *event)
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{
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int ret = 0;
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switch (event->header.type) {
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case PERF_RECORD_LOST:
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color_fprintf(trace->output, PERF_COLOR_RED,
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"LOST %" PRIu64 " events!\n", event->lost.lost);
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ret = machine__process_lost_event(machine, event);
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default:
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ret = machine__process_event(machine, event);
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break;
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}
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return ret;
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}
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static int trace__tool_process(struct perf_tool *tool,
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union perf_event *event,
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struct perf_sample *sample __maybe_unused,
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struct machine *machine)
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{
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struct trace *trace = container_of(tool, struct trace, tool);
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return trace__process_event(trace, machine, event);
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}
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static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist)
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{
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int err = symbol__init();
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if (err)
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return err;
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machine__init(&trace->host, "", HOST_KERNEL_ID);
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machine__create_kernel_maps(&trace->host);
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if (perf_target__has_task(&trace->opts.target)) {
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err = perf_event__synthesize_thread_map(&trace->tool, evlist->threads,
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trace__tool_process,
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&trace->host);
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} else {
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err = perf_event__synthesize_threads(&trace->tool, trace__tool_process,
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&trace->host);
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}
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if (err)
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symbol__exit();
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return err;
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}
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static int trace__read_syscall_info(struct trace *trace, int id)
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{
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char tp_name[128];
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struct syscall *sc;
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const char *name = audit_syscall_to_name(id, trace->audit_machine);
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if (name == NULL)
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return -1;
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if (id > trace->syscalls.max) {
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struct syscall *nsyscalls = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc));
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if (nsyscalls == NULL)
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return -1;
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if (trace->syscalls.max != -1) {
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memset(nsyscalls + trace->syscalls.max + 1, 0,
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(id - trace->syscalls.max) * sizeof(*sc));
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} else {
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memset(nsyscalls, 0, (id + 1) * sizeof(*sc));
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}
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trace->syscalls.table = nsyscalls;
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trace->syscalls.max = id;
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}
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sc = trace->syscalls.table + id;
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sc->name = name;
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if (trace->ev_qualifier && !strlist__find(trace->ev_qualifier, name)) {
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sc->filtered = true;
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/*
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* No need to do read tracepoint information since this will be
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* filtered out.
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*/
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return 0;
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}
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sc->fmt = syscall_fmt__find(sc->name);
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snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name);
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sc->tp_format = event_format__new("syscalls", tp_name);
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if (sc->tp_format == NULL && sc->fmt && sc->fmt->alias) {
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snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias);
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sc->tp_format = event_format__new("syscalls", tp_name);
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}
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return sc->tp_format != NULL ? 0 : -1;
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}
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static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
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unsigned long *args)
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{
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int i = 0;
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size_t printed = 0;
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if (sc->tp_format != NULL) {
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struct format_field *field;
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for (field = sc->tp_format->format.fields->next; field; field = field->next) {
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printed += scnprintf(bf + printed, size - printed,
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"%s%s: %ld", printed ? ", " : "",
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field->name, args[i++]);
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}
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} else {
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while (i < 6) {
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printed += scnprintf(bf + printed, size - printed,
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"%sarg%d: %ld",
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printed ? ", " : "", i, args[i]);
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++i;
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}
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}
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return printed;
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}
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typedef int (*tracepoint_handler)(struct trace *trace, struct perf_evsel *evsel,
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struct perf_sample *sample);
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static struct syscall *trace__syscall_info(struct trace *trace,
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struct perf_evsel *evsel,
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struct perf_sample *sample)
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{
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int id = perf_evsel__intval(evsel, sample, "id");
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if (id < 0) {
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fprintf(trace->output, "Invalid syscall %d id, skipping...\n", id);
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return NULL;
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}
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if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) &&
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trace__read_syscall_info(trace, id))
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goto out_cant_read;
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if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL))
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goto out_cant_read;
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return &trace->syscalls.table[id];
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out_cant_read:
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fprintf(trace->output, "Problems reading syscall %d", id);
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if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL)
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fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
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fputs(" information", trace->output);
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return NULL;
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}
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static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
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struct perf_sample *sample)
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{
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char *msg;
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void *args;
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size_t printed = 0;
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struct thread *thread;
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struct syscall *sc = trace__syscall_info(trace, evsel, sample);
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struct thread_trace *ttrace;
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if (sc == NULL)
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return -1;
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if (sc->filtered)
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return 0;
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thread = machine__findnew_thread(&trace->host, sample->tid);
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ttrace = thread__trace(thread, trace->output);
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if (ttrace == NULL)
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return -1;
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args = perf_evsel__rawptr(evsel, sample, "args");
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if (args == NULL) {
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fprintf(trace->output, "Problems reading syscall arguments\n");
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return -1;
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}
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ttrace = thread->priv;
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if (ttrace->entry_str == NULL) {
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ttrace->entry_str = malloc(1024);
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if (!ttrace->entry_str)
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return -1;
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}
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ttrace->entry_time = sample->time;
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msg = ttrace->entry_str;
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printed += scnprintf(msg + printed, 1024 - printed, "%s(", sc->name);
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printed += syscall__scnprintf_args(sc, msg + printed, 1024 - printed, args);
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if (!strcmp(sc->name, "exit_group") || !strcmp(sc->name, "exit")) {
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if (!trace->duration_filter) {
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trace__fprintf_entry_head(trace, thread, 1, sample->time, trace->output);
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fprintf(trace->output, "%-70s\n", ttrace->entry_str);
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}
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} else
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ttrace->entry_pending = true;
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return 0;
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}
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static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
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struct perf_sample *sample)
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{
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int ret;
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u64 duration = 0;
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struct thread *thread;
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struct syscall *sc = trace__syscall_info(trace, evsel, sample);
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struct thread_trace *ttrace;
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if (sc == NULL)
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return -1;
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if (sc->filtered)
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return 0;
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thread = machine__findnew_thread(&trace->host, sample->tid);
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ttrace = thread__trace(thread, trace->output);
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if (ttrace == NULL)
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return -1;
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ret = perf_evsel__intval(evsel, sample, "ret");
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ttrace = thread->priv;
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ttrace->exit_time = sample->time;
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if (ttrace->entry_time) {
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duration = sample->time - ttrace->entry_time;
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if (trace__filter_duration(trace, duration))
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goto out;
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} else if (trace->duration_filter)
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goto out;
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trace__fprintf_entry_head(trace, thread, duration, sample->time, trace->output);
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if (ttrace->entry_pending) {
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fprintf(trace->output, "%-70s", ttrace->entry_str);
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} else {
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fprintf(trace->output, " ... [");
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color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued");
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fprintf(trace->output, "]: %s()", sc->name);
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}
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if (ret < 0 && sc->fmt && sc->fmt->errmsg) {
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char bf[256];
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const char *emsg = strerror_r(-ret, bf, sizeof(bf)),
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*e = audit_errno_to_name(-ret);
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fprintf(trace->output, ") = -1 %s %s", e, emsg);
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} else if (ret == 0 && sc->fmt && sc->fmt->timeout)
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fprintf(trace->output, ") = 0 Timeout");
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else
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fprintf(trace->output, ") = %d", ret);
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fputc('\n', trace->output);
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out:
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ttrace->entry_pending = false;
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return 0;
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}
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static int trace__sched_stat_runtime(struct trace *trace, struct perf_evsel *evsel,
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struct perf_sample *sample)
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{
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u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
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double runtime_ms = (double)runtime / NSEC_PER_MSEC;
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struct thread *thread = machine__findnew_thread(&trace->host, sample->tid);
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struct thread_trace *ttrace = thread__trace(thread, trace->output);
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if (ttrace == NULL)
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goto out_dump;
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ttrace->runtime_ms += runtime_ms;
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trace->runtime_ms += runtime_ms;
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return 0;
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out_dump:
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fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
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evsel->name,
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perf_evsel__strval(evsel, sample, "comm"),
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(pid_t)perf_evsel__intval(evsel, sample, "pid"),
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runtime,
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perf_evsel__intval(evsel, sample, "vruntime"));
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return 0;
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}
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static int trace__run(struct trace *trace, int argc, const char **argv)
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{
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struct perf_evlist *evlist = perf_evlist__new();
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struct perf_evsel *evsel;
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int err = -1, i;
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unsigned long before;
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const bool forks = argc > 0;
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if (evlist == NULL) {
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fprintf(trace->output, "Not enough memory to run!\n");
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goto out;
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}
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if (perf_evlist__add_newtp(evlist, "raw_syscalls", "sys_enter", trace__sys_enter) ||
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perf_evlist__add_newtp(evlist, "raw_syscalls", "sys_exit", trace__sys_exit)) {
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fprintf(trace->output, "Couldn't read the raw_syscalls tracepoints information!\n");
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goto out_delete_evlist;
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}
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if (trace->sched &&
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perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime",
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trace__sched_stat_runtime)) {
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fprintf(trace->output, "Couldn't read the sched_stat_runtime tracepoint information!\n");
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goto out_delete_evlist;
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}
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err = perf_evlist__create_maps(evlist, &trace->opts.target);
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if (err < 0) {
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fprintf(trace->output, "Problems parsing the target to trace, check your options!\n");
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goto out_delete_evlist;
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}
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err = trace__symbols_init(trace, evlist);
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if (err < 0) {
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fprintf(trace->output, "Problems initializing symbol libraries!\n");
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goto out_delete_maps;
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}
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perf_evlist__config(evlist, &trace->opts);
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signal(SIGCHLD, sig_handler);
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signal(SIGINT, sig_handler);
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if (forks) {
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err = perf_evlist__prepare_workload(evlist, &trace->opts.target,
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argv, false, false);
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if (err < 0) {
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fprintf(trace->output, "Couldn't run the workload!\n");
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goto out_delete_maps;
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}
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}
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err = perf_evlist__open(evlist);
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if (err < 0) {
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fprintf(trace->output, "Couldn't create the events: %s\n", strerror(errno));
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goto out_delete_maps;
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}
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err = perf_evlist__mmap(evlist, UINT_MAX, false);
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if (err < 0) {
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fprintf(trace->output, "Couldn't mmap the events: %s\n", strerror(errno));
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goto out_close_evlist;
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}
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perf_evlist__enable(evlist);
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if (forks)
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perf_evlist__start_workload(evlist);
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trace->multiple_threads = evlist->threads->map[0] == -1 || evlist->threads->nr > 1;
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again:
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before = trace->nr_events;
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|
|
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) {
|
|
fprintf(trace->output, "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, &trace->host, event);
|
|
continue;
|
|
}
|
|
|
|
evsel = perf_evlist__id2evsel(evlist, sample.id);
|
|
if (evsel == NULL) {
|
|
fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample.id);
|
|
continue;
|
|
}
|
|
|
|
if (sample.raw_data == NULL) {
|
|
fprintf(trace->output, "%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->tid, 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;
|
|
}
|
|
|
|
static int trace__open_output(struct trace *trace, const char *filename)
|
|
{
|
|
struct stat st;
|
|
|
|
if (!stat(filename, &st) && st.st_size) {
|
|
char oldname[PATH_MAX];
|
|
|
|
scnprintf(oldname, sizeof(oldname), "%s.old", filename);
|
|
unlink(oldname);
|
|
rename(filename, oldname);
|
|
}
|
|
|
|
trace->output = fopen(filename, "w");
|
|
|
|
return trace->output == NULL ? -errno : 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,
|
|
},
|
|
.output = stdout,
|
|
};
|
|
const char *output_name = NULL;
|
|
const char *ev_qualifier_str = NULL;
|
|
const struct option trace_options[] = {
|
|
OPT_STRING('e', "expr", &ev_qualifier_str, "expr",
|
|
"list of events to trace"),
|
|
OPT_STRING('o', "output", &output_name, "file", "output file name"),
|
|
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);
|
|
|
|
if (output_name != NULL) {
|
|
err = trace__open_output(&trace, output_name);
|
|
if (err < 0) {
|
|
perror("failed to create output file");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (ev_qualifier_str != NULL) {
|
|
trace.ev_qualifier = strlist__new(true, ev_qualifier_str);
|
|
if (trace.ev_qualifier == NULL) {
|
|
fputs("Not enough memory to parse event qualifier",
|
|
trace.output);
|
|
err = -ENOMEM;
|
|
goto out_close;
|
|
}
|
|
}
|
|
|
|
err = perf_target__validate(&trace.opts.target);
|
|
if (err) {
|
|
perf_target__strerror(&trace.opts.target, err, bf, sizeof(bf));
|
|
fprintf(trace.output, "%s", bf);
|
|
goto out_close;
|
|
}
|
|
|
|
err = perf_target__parse_uid(&trace.opts.target);
|
|
if (err) {
|
|
perf_target__strerror(&trace.opts.target, err, bf, sizeof(bf));
|
|
fprintf(trace.output, "%s", bf);
|
|
goto out_close;
|
|
}
|
|
|
|
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, trace.output);
|
|
|
|
out_close:
|
|
if (output_name != NULL)
|
|
fclose(trace.output);
|
|
out:
|
|
return err;
|
|
}
|