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![Ingo Molnar](/assets/img/avatar_default.png)
Various small cleanups - removal of debug printks and dead functions, etc. Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
1063 lines
22 KiB
C
1063 lines
22 KiB
C
#include "builtin.h"
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#include "util/util.h"
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#include "util/cache.h"
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#include "util/symbol.h"
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#include "util/thread.h"
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#include "util/header.h"
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#include "util/parse-options.h"
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#include "perf.h"
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#include "util/debug.h"
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#include "util/trace-event.h"
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#include <sys/types.h>
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static char const *input_name = "perf.data";
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static int input;
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static unsigned long page_size;
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static unsigned long mmap_window = 32;
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static unsigned long total_comm = 0;
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static struct rb_root threads;
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static struct thread *last_match;
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static struct perf_header *header;
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static u64 sample_type;
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/*
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* Scheduler benchmarks
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*/
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#include <sys/resource.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/prctl.h>
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#include <linux/unistd.h>
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#include <semaphore.h>
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#include <pthread.h>
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#include <signal.h>
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#include <values.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <fcntl.h>
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#include <time.h>
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#include <math.h>
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#include <stdio.h>
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#define PR_SET_NAME 15 /* Set process name */
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#define BUG_ON(x) assert(!(x))
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#define DEBUG 0
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typedef unsigned long long nsec_t;
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static nsec_t run_measurement_overhead;
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static nsec_t sleep_measurement_overhead;
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static nsec_t get_nsecs(void)
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{
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struct timespec ts;
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clock_gettime(CLOCK_MONOTONIC, &ts);
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return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
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}
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static void burn_nsecs(nsec_t nsecs)
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{
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nsec_t T0 = get_nsecs(), T1;
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do {
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T1 = get_nsecs();
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} while (T1 + run_measurement_overhead < T0 + nsecs);
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}
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static void sleep_nsecs(nsec_t nsecs)
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{
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struct timespec ts;
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ts.tv_nsec = nsecs % 999999999;
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ts.tv_sec = nsecs / 999999999;
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nanosleep(&ts, NULL);
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}
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static void calibrate_run_measurement_overhead(void)
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{
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nsec_t T0, T1, delta, min_delta = 1000000000ULL;
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int i;
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for (i = 0; i < 10; i++) {
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T0 = get_nsecs();
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burn_nsecs(0);
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T1 = get_nsecs();
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delta = T1-T0;
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min_delta = min(min_delta, delta);
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}
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run_measurement_overhead = min_delta;
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printf("run measurement overhead: %Ld nsecs\n", min_delta);
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}
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static void calibrate_sleep_measurement_overhead(void)
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{
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nsec_t T0, T1, delta, min_delta = 1000000000ULL;
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int i;
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for (i = 0; i < 10; i++) {
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T0 = get_nsecs();
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sleep_nsecs(10000);
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T1 = get_nsecs();
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delta = T1-T0;
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min_delta = min(min_delta, delta);
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}
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min_delta -= 10000;
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sleep_measurement_overhead = min_delta;
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printf("sleep measurement overhead: %Ld nsecs\n", min_delta);
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}
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#define COMM_LEN 20
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#define SYM_LEN 129
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#define MAX_PID 65536
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static unsigned long nr_tasks;
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struct sched_event;
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struct task_desc {
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unsigned long nr;
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unsigned long pid;
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char comm[COMM_LEN];
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unsigned long nr_events;
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unsigned long curr_event;
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struct sched_event **events;
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pthread_t thread;
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sem_t sleep_sem;
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sem_t ready_for_work;
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sem_t work_done_sem;
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nsec_t cpu_usage;
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};
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enum sched_event_type {
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SCHED_EVENT_RUN,
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SCHED_EVENT_SLEEP,
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SCHED_EVENT_WAKEUP,
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};
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struct sched_event {
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enum sched_event_type type;
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nsec_t timestamp;
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nsec_t duration;
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unsigned long nr;
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int specific_wait;
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sem_t *wait_sem;
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struct task_desc *wakee;
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};
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static struct task_desc *pid_to_task[MAX_PID];
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static struct task_desc **tasks;
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static pthread_mutex_t start_work_mutex = PTHREAD_MUTEX_INITIALIZER;
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static nsec_t start_time;
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static pthread_mutex_t work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER;
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static unsigned long nr_run_events;
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static unsigned long nr_sleep_events;
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static unsigned long nr_wakeup_events;
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static unsigned long nr_sleep_corrections;
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static unsigned long nr_run_events_optimized;
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static struct sched_event *
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get_new_event(struct task_desc *task, nsec_t timestamp)
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{
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struct sched_event *event = calloc(1, sizeof(*event));
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unsigned long idx = task->nr_events;
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size_t size;
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event->timestamp = timestamp;
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event->nr = idx;
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task->nr_events++;
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size = sizeof(struct sched_event *) * task->nr_events;
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task->events = realloc(task->events, size);
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BUG_ON(!task->events);
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task->events[idx] = event;
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return event;
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}
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static struct sched_event *last_event(struct task_desc *task)
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{
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if (!task->nr_events)
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return NULL;
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return task->events[task->nr_events - 1];
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}
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static void
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add_sched_event_run(struct task_desc *task, nsec_t timestamp, u64 duration)
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{
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struct sched_event *event, *curr_event = last_event(task);
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/*
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* optimize an existing RUN event by merging this one
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* to it:
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*/
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if (curr_event && curr_event->type == SCHED_EVENT_RUN) {
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nr_run_events_optimized++;
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curr_event->duration += duration;
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return;
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}
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event = get_new_event(task, timestamp);
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event->type = SCHED_EVENT_RUN;
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event->duration = duration;
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nr_run_events++;
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}
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static unsigned long targetless_wakeups;
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static unsigned long multitarget_wakeups;
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static void
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add_sched_event_wakeup(struct task_desc *task, nsec_t timestamp,
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struct task_desc *wakee)
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{
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struct sched_event *event, *wakee_event;
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event = get_new_event(task, timestamp);
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event->type = SCHED_EVENT_WAKEUP;
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event->wakee = wakee;
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wakee_event = last_event(wakee);
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if (!wakee_event || wakee_event->type != SCHED_EVENT_SLEEP) {
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targetless_wakeups++;
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return;
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}
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if (wakee_event->wait_sem) {
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multitarget_wakeups++;
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return;
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}
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wakee_event->wait_sem = calloc(1, sizeof(*wakee_event->wait_sem));
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sem_init(wakee_event->wait_sem, 0, 0);
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wakee_event->specific_wait = 1;
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event->wait_sem = wakee_event->wait_sem;
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nr_wakeup_events++;
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}
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static void
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add_sched_event_sleep(struct task_desc *task, nsec_t timestamp,
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u64 task_state __used)
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{
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struct sched_event *event = get_new_event(task, timestamp);
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event->type = SCHED_EVENT_SLEEP;
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nr_sleep_events++;
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}
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static struct task_desc *register_pid(unsigned long pid, const char *comm)
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{
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struct task_desc *task;
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BUG_ON(pid >= MAX_PID);
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task = pid_to_task[pid];
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if (task)
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return task;
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task = calloc(1, sizeof(*task));
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task->pid = pid;
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task->nr = nr_tasks;
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strcpy(task->comm, comm);
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/*
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* every task starts in sleeping state - this gets ignored
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* if there's no wakeup pointing to this sleep state:
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*/
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add_sched_event_sleep(task, 0, 0);
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pid_to_task[pid] = task;
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nr_tasks++;
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tasks = realloc(tasks, nr_tasks*sizeof(struct task_task *));
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BUG_ON(!tasks);
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tasks[task->nr] = task;
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if (verbose)
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printf("registered task #%ld, PID %ld (%s)\n", nr_tasks, pid, comm);
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return task;
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}
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static void print_task_traces(void)
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{
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struct task_desc *task;
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unsigned long i;
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for (i = 0; i < nr_tasks; i++) {
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task = tasks[i];
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printf("task %6ld (%20s:%10ld), nr_events: %ld\n",
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task->nr, task->comm, task->pid, task->nr_events);
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}
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}
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static void add_cross_task_wakeups(void)
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{
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struct task_desc *task1, *task2;
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unsigned long i, j;
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for (i = 0; i < nr_tasks; i++) {
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task1 = tasks[i];
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j = i + 1;
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if (j == nr_tasks)
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j = 0;
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task2 = tasks[j];
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add_sched_event_wakeup(task1, 0, task2);
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}
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}
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static void
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process_sched_event(struct task_desc *this_task __used, struct sched_event *event)
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{
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int ret = 0;
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nsec_t now;
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long long delta;
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now = get_nsecs();
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delta = start_time + event->timestamp - now;
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switch (event->type) {
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case SCHED_EVENT_RUN:
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burn_nsecs(event->duration);
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break;
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case SCHED_EVENT_SLEEP:
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if (event->wait_sem)
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ret = sem_wait(event->wait_sem);
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BUG_ON(ret);
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break;
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case SCHED_EVENT_WAKEUP:
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if (event->wait_sem)
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ret = sem_post(event->wait_sem);
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BUG_ON(ret);
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break;
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default:
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BUG_ON(1);
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}
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}
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static nsec_t get_cpu_usage_nsec_parent(void)
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{
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struct rusage ru;
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nsec_t sum;
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int err;
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err = getrusage(RUSAGE_SELF, &ru);
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BUG_ON(err);
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sum = ru.ru_utime.tv_sec*1e9 + ru.ru_utime.tv_usec*1e3;
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sum += ru.ru_stime.tv_sec*1e9 + ru.ru_stime.tv_usec*1e3;
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return sum;
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}
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static nsec_t get_cpu_usage_nsec_self(void)
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{
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char filename [] = "/proc/1234567890/sched";
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unsigned long msecs, nsecs;
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char *line = NULL;
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nsec_t total = 0;
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size_t len = 0;
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ssize_t chars;
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FILE *file;
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int ret;
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sprintf(filename, "/proc/%d/sched", getpid());
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file = fopen(filename, "r");
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BUG_ON(!file);
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while ((chars = getline(&line, &len, file)) != -1) {
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ret = sscanf(line, "se.sum_exec_runtime : %ld.%06ld\n",
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&msecs, &nsecs);
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if (ret == 2) {
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total = msecs*1e6 + nsecs;
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break;
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}
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}
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if (line)
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free(line);
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fclose(file);
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return total;
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}
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static void *thread_func(void *ctx)
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{
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struct task_desc *this_task = ctx;
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nsec_t cpu_usage_0, cpu_usage_1;
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unsigned long i, ret;
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char comm2[22];
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sprintf(comm2, ":%s", this_task->comm);
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prctl(PR_SET_NAME, comm2);
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again:
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ret = sem_post(&this_task->ready_for_work);
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BUG_ON(ret);
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ret = pthread_mutex_lock(&start_work_mutex);
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BUG_ON(ret);
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ret = pthread_mutex_unlock(&start_work_mutex);
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BUG_ON(ret);
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cpu_usage_0 = get_cpu_usage_nsec_self();
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for (i = 0; i < this_task->nr_events; i++) {
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this_task->curr_event = i;
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process_sched_event(this_task, this_task->events[i]);
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}
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cpu_usage_1 = get_cpu_usage_nsec_self();
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this_task->cpu_usage = cpu_usage_1 - cpu_usage_0;
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ret = sem_post(&this_task->work_done_sem);
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BUG_ON(ret);
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ret = pthread_mutex_lock(&work_done_wait_mutex);
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BUG_ON(ret);
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ret = pthread_mutex_unlock(&work_done_wait_mutex);
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BUG_ON(ret);
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goto again;
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}
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static void create_tasks(void)
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{
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struct task_desc *task;
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pthread_attr_t attr;
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unsigned long i;
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int err;
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err = pthread_attr_init(&attr);
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BUG_ON(err);
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err = pthread_attr_setstacksize(&attr, (size_t)(16*1024));
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BUG_ON(err);
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err = pthread_mutex_lock(&start_work_mutex);
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BUG_ON(err);
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err = pthread_mutex_lock(&work_done_wait_mutex);
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BUG_ON(err);
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for (i = 0; i < nr_tasks; i++) {
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task = tasks[i];
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sem_init(&task->sleep_sem, 0, 0);
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sem_init(&task->ready_for_work, 0, 0);
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sem_init(&task->work_done_sem, 0, 0);
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task->curr_event = 0;
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err = pthread_create(&task->thread, &attr, thread_func, task);
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BUG_ON(err);
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}
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}
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static nsec_t cpu_usage;
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static nsec_t runavg_cpu_usage;
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static nsec_t parent_cpu_usage;
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static nsec_t runavg_parent_cpu_usage;
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static void wait_for_tasks(void)
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{
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nsec_t cpu_usage_0, cpu_usage_1;
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struct task_desc *task;
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unsigned long i, ret;
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start_time = get_nsecs();
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cpu_usage = 0;
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pthread_mutex_unlock(&work_done_wait_mutex);
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for (i = 0; i < nr_tasks; i++) {
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task = tasks[i];
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ret = sem_wait(&task->ready_for_work);
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BUG_ON(ret);
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sem_init(&task->ready_for_work, 0, 0);
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}
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ret = pthread_mutex_lock(&work_done_wait_mutex);
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BUG_ON(ret);
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cpu_usage_0 = get_cpu_usage_nsec_parent();
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pthread_mutex_unlock(&start_work_mutex);
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for (i = 0; i < nr_tasks; i++) {
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task = tasks[i];
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ret = sem_wait(&task->work_done_sem);
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BUG_ON(ret);
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sem_init(&task->work_done_sem, 0, 0);
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cpu_usage += task->cpu_usage;
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task->cpu_usage = 0;
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}
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cpu_usage_1 = get_cpu_usage_nsec_parent();
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if (!runavg_cpu_usage)
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runavg_cpu_usage = cpu_usage;
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runavg_cpu_usage = (runavg_cpu_usage*9 + cpu_usage)/10;
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parent_cpu_usage = cpu_usage_1 - cpu_usage_0;
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if (!runavg_parent_cpu_usage)
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runavg_parent_cpu_usage = parent_cpu_usage;
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runavg_parent_cpu_usage = (runavg_parent_cpu_usage*9 +
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parent_cpu_usage)/10;
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ret = pthread_mutex_lock(&start_work_mutex);
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BUG_ON(ret);
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for (i = 0; i < nr_tasks; i++) {
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task = tasks[i];
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sem_init(&task->sleep_sem, 0, 0);
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task->curr_event = 0;
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}
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}
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static int __cmd_sched(void);
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static void parse_trace(void)
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{
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__cmd_sched();
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printf("nr_run_events: %ld\n", nr_run_events);
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printf("nr_sleep_events: %ld\n", nr_sleep_events);
|
|
printf("nr_wakeup_events: %ld\n", nr_wakeup_events);
|
|
|
|
if (targetless_wakeups)
|
|
printf("target-less wakeups: %ld\n", targetless_wakeups);
|
|
if (multitarget_wakeups)
|
|
printf("multi-target wakeups: %ld\n", multitarget_wakeups);
|
|
if (nr_run_events_optimized)
|
|
printf("run events optimized: %ld\n",
|
|
nr_run_events_optimized);
|
|
}
|
|
|
|
static unsigned long nr_runs;
|
|
static nsec_t sum_runtime;
|
|
static nsec_t sum_fluct;
|
|
static nsec_t run_avg;
|
|
|
|
static void run_one_test(void)
|
|
{
|
|
nsec_t T0, T1, delta, avg_delta, fluct, std_dev;
|
|
|
|
T0 = get_nsecs();
|
|
wait_for_tasks();
|
|
T1 = get_nsecs();
|
|
|
|
delta = T1 - T0;
|
|
sum_runtime += delta;
|
|
nr_runs++;
|
|
|
|
avg_delta = sum_runtime / nr_runs;
|
|
if (delta < avg_delta)
|
|
fluct = avg_delta - delta;
|
|
else
|
|
fluct = delta - avg_delta;
|
|
sum_fluct += fluct;
|
|
std_dev = sum_fluct / nr_runs / sqrt(nr_runs);
|
|
if (!run_avg)
|
|
run_avg = delta;
|
|
run_avg = (run_avg*9 + delta)/10;
|
|
|
|
printf("#%-3ld: %0.3f, ",
|
|
nr_runs, (double)delta/1000000.0);
|
|
|
|
#if 0
|
|
printf("%0.2f +- %0.2f, ",
|
|
(double)avg_delta/1e6, (double)std_dev/1e6);
|
|
#endif
|
|
printf("ravg: %0.2f, ",
|
|
(double)run_avg/1e6);
|
|
|
|
printf("cpu: %0.2f / %0.2f",
|
|
(double)cpu_usage/1e6, (double)runavg_cpu_usage/1e6);
|
|
|
|
#if 0
|
|
/*
|
|
* rusage statistics done by the parent, these are less
|
|
* accurate than the sum_exec_runtime based statistics:
|
|
*/
|
|
printf(" [%0.2f / %0.2f]",
|
|
(double)parent_cpu_usage/1e6,
|
|
(double)runavg_parent_cpu_usage/1e6);
|
|
#endif
|
|
|
|
printf("\n");
|
|
|
|
if (nr_sleep_corrections)
|
|
printf(" (%ld sleep corrections)\n", nr_sleep_corrections);
|
|
nr_sleep_corrections = 0;
|
|
}
|
|
|
|
static void test_calibrations(void)
|
|
{
|
|
nsec_t T0, T1;
|
|
|
|
T0 = get_nsecs();
|
|
burn_nsecs(1e6);
|
|
T1 = get_nsecs();
|
|
|
|
printf("the run test took %Ld nsecs\n", T1-T0);
|
|
|
|
T0 = get_nsecs();
|
|
sleep_nsecs(1e6);
|
|
T1 = get_nsecs();
|
|
|
|
printf("the sleep test took %Ld nsecs\n", T1-T0);
|
|
}
|
|
|
|
static int
|
|
process_comm_event(event_t *event, unsigned long offset, unsigned long head)
|
|
{
|
|
struct thread *thread;
|
|
|
|
thread = threads__findnew(event->comm.pid, &threads, &last_match);
|
|
|
|
dump_printf("%p [%p]: PERF_EVENT_COMM: %s:%d\n",
|
|
(void *)(offset + head),
|
|
(void *)(long)(event->header.size),
|
|
event->comm.comm, event->comm.pid);
|
|
|
|
if (thread == NULL ||
|
|
thread__set_comm(thread, event->comm.comm)) {
|
|
dump_printf("problem processing PERF_EVENT_COMM, skipping event.\n");
|
|
return -1;
|
|
}
|
|
total_comm++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct trace_wakeup_event {
|
|
u32 size;
|
|
|
|
u16 common_type;
|
|
u8 common_flags;
|
|
u8 common_preempt_count;
|
|
u32 common_pid;
|
|
u32 common_tgid;
|
|
|
|
char comm[16];
|
|
u32 pid;
|
|
|
|
u32 prio;
|
|
u32 success;
|
|
u32 cpu;
|
|
};
|
|
|
|
static void
|
|
process_sched_wakeup_event(struct trace_wakeup_event *wakeup_event, struct event *event,
|
|
int cpu __used, u64 timestamp __used, struct thread *thread __used)
|
|
{
|
|
struct task_desc *waker, *wakee;
|
|
|
|
if (verbose) {
|
|
printf("sched_wakeup event %p\n", event);
|
|
|
|
printf(" ... pid %d woke up %s/%d\n",
|
|
wakeup_event->common_pid,
|
|
wakeup_event->comm,
|
|
wakeup_event->pid);
|
|
}
|
|
|
|
waker = register_pid(wakeup_event->common_pid, "<unknown>");
|
|
wakee = register_pid(wakeup_event->pid, wakeup_event->comm);
|
|
|
|
add_sched_event_wakeup(waker, timestamp, wakee);
|
|
}
|
|
|
|
struct trace_switch_event {
|
|
u32 size;
|
|
|
|
u16 common_type;
|
|
u8 common_flags;
|
|
u8 common_preempt_count;
|
|
u32 common_pid;
|
|
u32 common_tgid;
|
|
|
|
char prev_comm[16];
|
|
u32 prev_pid;
|
|
u32 prev_prio;
|
|
u64 prev_state;
|
|
char next_comm[16];
|
|
u32 next_pid;
|
|
u32 next_prio;
|
|
};
|
|
|
|
#define MAX_CPUS 4096
|
|
|
|
unsigned long cpu_last_switched[MAX_CPUS];
|
|
|
|
static void
|
|
process_sched_switch_event(struct trace_switch_event *switch_event, struct event *event,
|
|
int cpu __used, u64 timestamp __used, struct thread *thread __used)
|
|
{
|
|
struct task_desc *prev, *next;
|
|
u64 timestamp0;
|
|
s64 delta;
|
|
|
|
if (verbose)
|
|
printf("sched_switch event %p\n", event);
|
|
|
|
if (cpu >= MAX_CPUS || cpu < 0)
|
|
return;
|
|
|
|
timestamp0 = cpu_last_switched[cpu];
|
|
if (timestamp0)
|
|
delta = timestamp - timestamp0;
|
|
else
|
|
delta = 0;
|
|
|
|
if (delta < 0)
|
|
die("hm, delta: %Ld < 0 ?\n", delta);
|
|
|
|
if (verbose) {
|
|
printf(" ... switch from %s/%d to %s/%d [ran %Ld nsecs]\n",
|
|
switch_event->prev_comm, switch_event->prev_pid,
|
|
switch_event->next_comm, switch_event->next_pid,
|
|
delta);
|
|
}
|
|
|
|
prev = register_pid(switch_event->prev_pid, switch_event->prev_comm);
|
|
next = register_pid(switch_event->next_pid, switch_event->next_comm);
|
|
|
|
cpu_last_switched[cpu] = timestamp;
|
|
|
|
add_sched_event_run(prev, timestamp, delta);
|
|
add_sched_event_sleep(prev, timestamp, switch_event->prev_state);
|
|
}
|
|
|
|
struct trace_fork_event {
|
|
u32 size;
|
|
|
|
u16 common_type;
|
|
u8 common_flags;
|
|
u8 common_preempt_count;
|
|
u32 common_pid;
|
|
u32 common_tgid;
|
|
|
|
char parent_comm[16];
|
|
u32 parent_pid;
|
|
char child_comm[16];
|
|
u32 child_pid;
|
|
};
|
|
|
|
static void
|
|
process_sched_fork_event(struct trace_fork_event *fork_event, struct event *event,
|
|
int cpu __used, u64 timestamp __used, struct thread *thread __used)
|
|
{
|
|
if (verbose) {
|
|
printf("sched_fork event %p\n", event);
|
|
printf("... parent: %s/%d\n", fork_event->parent_comm, fork_event->parent_pid);
|
|
printf("... child: %s/%d\n", fork_event->child_comm, fork_event->child_pid);
|
|
}
|
|
register_pid(fork_event->parent_pid, fork_event->parent_comm);
|
|
register_pid(fork_event->child_pid, fork_event->child_comm);
|
|
}
|
|
|
|
static void process_sched_exit_event(struct event *event,
|
|
int cpu __used, u64 timestamp __used, struct thread *thread __used)
|
|
{
|
|
if (verbose)
|
|
printf("sched_exit event %p\n", event);
|
|
}
|
|
|
|
static void
|
|
process_raw_event(event_t *raw_event __used, void *more_data,
|
|
int cpu, u64 timestamp, struct thread *thread)
|
|
{
|
|
struct {
|
|
u32 size;
|
|
char data[0];
|
|
} *raw = more_data;
|
|
struct event *event;
|
|
int type;
|
|
|
|
type = trace_parse_common_type(raw->data);
|
|
event = trace_find_event(type);
|
|
|
|
if (!strcmp(event->name, "sched_switch"))
|
|
process_sched_switch_event(more_data, event, cpu, timestamp, thread);
|
|
if (!strcmp(event->name, "sched_wakeup"))
|
|
process_sched_wakeup_event(more_data, event, cpu, timestamp, thread);
|
|
if (!strcmp(event->name, "sched_wakeup_new"))
|
|
process_sched_wakeup_event(more_data, event, cpu, timestamp, thread);
|
|
if (!strcmp(event->name, "sched_process_fork"))
|
|
process_sched_fork_event(more_data, event, cpu, timestamp, thread);
|
|
if (!strcmp(event->name, "sched_process_exit"))
|
|
process_sched_exit_event(event, cpu, timestamp, thread);
|
|
}
|
|
|
|
static int
|
|
process_sample_event(event_t *event, unsigned long offset, unsigned long head)
|
|
{
|
|
char level;
|
|
int show = 0;
|
|
struct dso *dso = NULL;
|
|
struct thread *thread;
|
|
u64 ip = event->ip.ip;
|
|
u64 timestamp = -1;
|
|
u32 cpu = -1;
|
|
u64 period = 1;
|
|
void *more_data = event->ip.__more_data;
|
|
int cpumode;
|
|
|
|
thread = threads__findnew(event->ip.pid, &threads, &last_match);
|
|
|
|
if (sample_type & PERF_SAMPLE_TIME) {
|
|
timestamp = *(u64 *)more_data;
|
|
more_data += sizeof(u64);
|
|
}
|
|
|
|
if (sample_type & PERF_SAMPLE_CPU) {
|
|
cpu = *(u32 *)more_data;
|
|
more_data += sizeof(u32);
|
|
more_data += sizeof(u32); /* reserved */
|
|
}
|
|
|
|
if (sample_type & PERF_SAMPLE_PERIOD) {
|
|
period = *(u64 *)more_data;
|
|
more_data += sizeof(u64);
|
|
}
|
|
|
|
dump_printf("%p [%p]: PERF_EVENT_SAMPLE (IP, %d): %d/%d: %p period: %Ld\n",
|
|
(void *)(offset + head),
|
|
(void *)(long)(event->header.size),
|
|
event->header.misc,
|
|
event->ip.pid, event->ip.tid,
|
|
(void *)(long)ip,
|
|
(long long)period);
|
|
|
|
dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
|
|
|
|
if (thread == NULL) {
|
|
eprintf("problem processing %d event, skipping it.\n",
|
|
event->header.type);
|
|
return -1;
|
|
}
|
|
|
|
cpumode = event->header.misc & PERF_EVENT_MISC_CPUMODE_MASK;
|
|
|
|
if (cpumode == PERF_EVENT_MISC_KERNEL) {
|
|
show = SHOW_KERNEL;
|
|
level = 'k';
|
|
|
|
dso = kernel_dso;
|
|
|
|
dump_printf(" ...... dso: %s\n", dso->name);
|
|
|
|
} else if (cpumode == PERF_EVENT_MISC_USER) {
|
|
|
|
show = SHOW_USER;
|
|
level = '.';
|
|
|
|
} else {
|
|
show = SHOW_HV;
|
|
level = 'H';
|
|
|
|
dso = hypervisor_dso;
|
|
|
|
dump_printf(" ...... dso: [hypervisor]\n");
|
|
}
|
|
|
|
if (sample_type & PERF_SAMPLE_RAW)
|
|
process_raw_event(event, more_data, cpu, timestamp, thread);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
process_event(event_t *event, unsigned long offset, unsigned long head)
|
|
{
|
|
trace_event(event);
|
|
|
|
switch (event->header.type) {
|
|
case PERF_EVENT_MMAP ... PERF_EVENT_LOST:
|
|
return 0;
|
|
|
|
case PERF_EVENT_COMM:
|
|
return process_comm_event(event, offset, head);
|
|
|
|
case PERF_EVENT_EXIT ... PERF_EVENT_READ:
|
|
return 0;
|
|
|
|
case PERF_EVENT_SAMPLE:
|
|
return process_sample_event(event, offset, head);
|
|
|
|
case PERF_EVENT_MAX:
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __cmd_sched(void)
|
|
{
|
|
int ret, rc = EXIT_FAILURE;
|
|
unsigned long offset = 0;
|
|
unsigned long head = 0;
|
|
struct stat perf_stat;
|
|
event_t *event;
|
|
uint32_t size;
|
|
char *buf;
|
|
|
|
trace_report();
|
|
register_idle_thread(&threads, &last_match);
|
|
|
|
input = open(input_name, O_RDONLY);
|
|
if (input < 0) {
|
|
perror("failed to open file");
|
|
exit(-1);
|
|
}
|
|
|
|
ret = fstat(input, &perf_stat);
|
|
if (ret < 0) {
|
|
perror("failed to stat file");
|
|
exit(-1);
|
|
}
|
|
|
|
if (!perf_stat.st_size) {
|
|
fprintf(stderr, "zero-sized file, nothing to do!\n");
|
|
exit(0);
|
|
}
|
|
header = perf_header__read(input);
|
|
head = header->data_offset;
|
|
sample_type = perf_header__sample_type(header);
|
|
|
|
if (!(sample_type & PERF_SAMPLE_RAW))
|
|
die("No trace sample to read. Did you call perf record "
|
|
"without -R?");
|
|
|
|
if (load_kernel() < 0) {
|
|
perror("failed to load kernel symbols");
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
remap:
|
|
buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
|
|
MAP_SHARED, input, offset);
|
|
if (buf == MAP_FAILED) {
|
|
perror("failed to mmap file");
|
|
exit(-1);
|
|
}
|
|
|
|
more:
|
|
event = (event_t *)(buf + head);
|
|
|
|
size = event->header.size;
|
|
if (!size)
|
|
size = 8;
|
|
|
|
if (head + event->header.size >= page_size * mmap_window) {
|
|
unsigned long shift = page_size * (head / page_size);
|
|
int res;
|
|
|
|
res = munmap(buf, page_size * mmap_window);
|
|
assert(res == 0);
|
|
|
|
offset += shift;
|
|
head -= shift;
|
|
goto remap;
|
|
}
|
|
|
|
size = event->header.size;
|
|
|
|
|
|
if (!size || process_event(event, offset, head) < 0) {
|
|
|
|
/*
|
|
* assume we lost track of the stream, check alignment, and
|
|
* increment a single u64 in the hope to catch on again 'soon'.
|
|
*/
|
|
|
|
if (unlikely(head & 7))
|
|
head &= ~7ULL;
|
|
|
|
size = 8;
|
|
}
|
|
|
|
head += size;
|
|
|
|
if (offset + head < (unsigned long)perf_stat.st_size)
|
|
goto more;
|
|
|
|
rc = EXIT_SUCCESS;
|
|
close(input);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static const char * const annotate_usage[] = {
|
|
"perf trace [<options>] <command>",
|
|
NULL
|
|
};
|
|
|
|
static const struct option options[] = {
|
|
OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
|
|
"dump raw trace in ASCII"),
|
|
OPT_BOOLEAN('v', "verbose", &verbose,
|
|
"be more verbose (show symbol address, etc)"),
|
|
OPT_END()
|
|
};
|
|
|
|
int cmd_sched(int argc, const char **argv, const char *prefix __used)
|
|
{
|
|
long nr_iterations = 10, i;
|
|
|
|
symbol__init();
|
|
page_size = getpagesize();
|
|
|
|
argc = parse_options(argc, argv, options, annotate_usage, 0);
|
|
if (argc) {
|
|
/*
|
|
* Special case: if there's an argument left then assume tha
|
|
* it's a symbol filter:
|
|
*/
|
|
if (argc > 1)
|
|
usage_with_options(annotate_usage, options);
|
|
}
|
|
|
|
// setup_pager();
|
|
|
|
calibrate_run_measurement_overhead();
|
|
calibrate_sleep_measurement_overhead();
|
|
|
|
test_calibrations();
|
|
|
|
parse_trace();
|
|
print_task_traces();
|
|
add_cross_task_wakeups();
|
|
|
|
create_tasks();
|
|
printf("------------------------------------------------------------\n");
|
|
for (i = 0; i < nr_iterations; i++)
|
|
run_one_test();
|
|
|
|
return 0;
|
|
}
|