1760 lines
38 KiB
C
1760 lines
38 KiB
C
#include "builtin.h"
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#include "perf.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 "util/trace-event.h"
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#include "util/debug.h"
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#include <sys/types.h>
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#include <sys/prctl.h>
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#include <semaphore.h>
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#include <pthread.h>
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#include <math.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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static char default_sort_order[] = "avg, max, switch, runtime";
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static char *sort_order = default_sort_order;
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#define PR_SET_NAME 15 /* Set process name */
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#define MAX_CPUS 4096
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#define BUG_ON(x) assert(!(x))
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static u64 run_measurement_overhead;
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static u64 sleep_measurement_overhead;
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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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u64 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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u64 timestamp;
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u64 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 u64 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 unsigned long targetless_wakeups;
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static unsigned long multitarget_wakeups;
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static u64 cpu_usage;
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static u64 runavg_cpu_usage;
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static u64 parent_cpu_usage;
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static u64 runavg_parent_cpu_usage;
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static unsigned long nr_runs;
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static u64 sum_runtime;
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static u64 sum_fluct;
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static u64 run_avg;
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static unsigned long replay_repeat = 10;
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static unsigned long nr_timestamps;
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static unsigned long unordered_timestamps;
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#define TASK_STATE_TO_CHAR_STR "RSDTtZX"
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enum thread_state {
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THREAD_SLEEPING = 0,
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THREAD_WAIT_CPU,
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THREAD_SCHED_IN,
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THREAD_IGNORE
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};
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struct work_atom {
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struct list_head list;
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enum thread_state state;
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u64 sched_out_time;
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u64 wake_up_time;
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u64 sched_in_time;
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u64 runtime;
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};
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struct task_atoms {
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struct list_head atom_list;
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struct thread *thread;
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struct rb_node node;
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u64 max_lat;
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u64 total_lat;
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u64 nb_atoms;
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u64 total_runtime;
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};
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typedef int (*sort_fn_t)(struct task_atoms *, struct task_atoms *);
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static struct rb_root atom_root, sorted_atom_root;
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static u64 all_runtime;
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static u64 all_count;
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static int read_events(void);
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static u64 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(u64 nsecs)
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{
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u64 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(u64 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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u64 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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u64 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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static struct sched_event *
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get_new_event(struct task_desc *task, u64 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, u64 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 void
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add_sched_event_wakeup(struct task_desc *task, u64 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, u64 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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u64 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 u64 get_cpu_usage_nsec_parent(void)
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{
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struct rusage ru;
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u64 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 u64 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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u64 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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u64 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 void wait_for_tasks(void)
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{
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u64 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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|
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static void run_one_test(void)
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|
{
|
|
u64 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);
|
|
|
|
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)
|
|
{
|
|
u64 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 void __cmd_replay(void)
|
|
{
|
|
unsigned long i;
|
|
|
|
calibrate_run_measurement_overhead();
|
|
calibrate_sleep_measurement_overhead();
|
|
|
|
test_calibrations();
|
|
|
|
read_events();
|
|
|
|
printf("nr_run_events: %ld\n", nr_run_events);
|
|
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);
|
|
|
|
print_task_traces();
|
|
add_cross_task_wakeups();
|
|
|
|
create_tasks();
|
|
printf("------------------------------------------------------------\n");
|
|
for (i = 0; i < replay_repeat; i++)
|
|
run_one_test();
|
|
}
|
|
|
|
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 raw_event_sample {
|
|
u32 size;
|
|
char data[0];
|
|
};
|
|
|
|
#define FILL_FIELD(ptr, field, event, data) \
|
|
ptr.field = (typeof(ptr.field)) raw_field_value(event, #field, data)
|
|
|
|
#define FILL_ARRAY(ptr, array, event, data) \
|
|
do { \
|
|
void *__array = raw_field_ptr(event, #array, data); \
|
|
memcpy(ptr.array, __array, sizeof(ptr.array)); \
|
|
} while(0)
|
|
|
|
#define FILL_COMMON_FIELDS(ptr, event, data) \
|
|
do { \
|
|
FILL_FIELD(ptr, common_type, event, data); \
|
|
FILL_FIELD(ptr, common_flags, event, data); \
|
|
FILL_FIELD(ptr, common_preempt_count, event, data); \
|
|
FILL_FIELD(ptr, common_pid, event, data); \
|
|
FILL_FIELD(ptr, common_tgid, event, data); \
|
|
} while (0)
|
|
|
|
|
|
|
|
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;
|
|
};
|
|
|
|
|
|
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;
|
|
};
|
|
|
|
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;
|
|
};
|
|
|
|
struct trace_sched_handler {
|
|
void (*switch_event)(struct trace_switch_event *,
|
|
struct event *,
|
|
int cpu,
|
|
u64 timestamp,
|
|
struct thread *thread);
|
|
|
|
void (*wakeup_event)(struct trace_wakeup_event *,
|
|
struct event *,
|
|
int cpu,
|
|
u64 timestamp,
|
|
struct thread *thread);
|
|
|
|
void (*fork_event)(struct trace_fork_event *,
|
|
struct event *,
|
|
int cpu,
|
|
u64 timestamp,
|
|
struct thread *thread);
|
|
};
|
|
|
|
|
|
static void
|
|
replay_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);
|
|
}
|
|
|
|
static unsigned long cpu_last_switched[MAX_CPUS];
|
|
|
|
static void
|
|
replay_switch_event(struct trace_switch_event *switch_event,
|
|
struct event *event,
|
|
int cpu,
|
|
u64 timestamp,
|
|
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);
|
|
}
|
|
|
|
|
|
static void
|
|
replay_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 struct trace_sched_handler replay_ops = {
|
|
.wakeup_event = replay_wakeup_event,
|
|
.switch_event = replay_switch_event,
|
|
.fork_event = replay_fork_event,
|
|
};
|
|
|
|
struct sort_dimension {
|
|
const char *name;
|
|
sort_fn_t cmp;
|
|
struct list_head list;
|
|
};
|
|
|
|
static LIST_HEAD(cmp_pid);
|
|
|
|
static int
|
|
thread_lat_cmp(struct list_head *list, struct task_atoms *l, struct task_atoms *r)
|
|
{
|
|
struct sort_dimension *sort;
|
|
int ret = 0;
|
|
|
|
BUG_ON(list_empty(list));
|
|
|
|
list_for_each_entry(sort, list, list) {
|
|
ret = sort->cmp(l, r);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct task_atoms *
|
|
thread_atoms_search(struct rb_root *root, struct thread *thread,
|
|
struct list_head *sort_list)
|
|
{
|
|
struct rb_node *node = root->rb_node;
|
|
struct task_atoms key = { .thread = thread };
|
|
|
|
while (node) {
|
|
struct task_atoms *atoms;
|
|
int cmp;
|
|
|
|
atoms = container_of(node, struct task_atoms, node);
|
|
|
|
cmp = thread_lat_cmp(sort_list, &key, atoms);
|
|
if (cmp > 0)
|
|
node = node->rb_left;
|
|
else if (cmp < 0)
|
|
node = node->rb_right;
|
|
else {
|
|
BUG_ON(thread != atoms->thread);
|
|
return atoms;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
__thread_latency_insert(struct rb_root *root, struct task_atoms *data,
|
|
struct list_head *sort_list)
|
|
{
|
|
struct rb_node **new = &(root->rb_node), *parent = NULL;
|
|
|
|
while (*new) {
|
|
struct task_atoms *this;
|
|
int cmp;
|
|
|
|
this = container_of(*new, struct task_atoms, node);
|
|
parent = *new;
|
|
|
|
cmp = thread_lat_cmp(sort_list, data, this);
|
|
|
|
if (cmp > 0)
|
|
new = &((*new)->rb_left);
|
|
else
|
|
new = &((*new)->rb_right);
|
|
}
|
|
|
|
rb_link_node(&data->node, parent, new);
|
|
rb_insert_color(&data->node, root);
|
|
}
|
|
|
|
static void thread_atoms_insert(struct thread *thread)
|
|
{
|
|
struct task_atoms *atoms;
|
|
|
|
atoms = calloc(sizeof(*atoms), 1);
|
|
if (!atoms)
|
|
die("No memory");
|
|
|
|
atoms->thread = thread;
|
|
INIT_LIST_HEAD(&atoms->atom_list);
|
|
__thread_latency_insert(&atom_root, atoms, &cmp_pid);
|
|
}
|
|
|
|
static void
|
|
latency_fork_event(struct trace_fork_event *fork_event __used,
|
|
struct event *event __used,
|
|
int cpu __used,
|
|
u64 timestamp __used,
|
|
struct thread *thread __used)
|
|
{
|
|
/* should insert the newcomer */
|
|
}
|
|
|
|
__used
|
|
static char sched_out_state(struct trace_switch_event *switch_event)
|
|
{
|
|
const char *str = TASK_STATE_TO_CHAR_STR;
|
|
|
|
return str[switch_event->prev_state];
|
|
}
|
|
|
|
static void
|
|
lat_sched_out(struct task_atoms *atoms,
|
|
struct trace_switch_event *switch_event __used,
|
|
u64 delta,
|
|
u64 timestamp)
|
|
{
|
|
struct work_atom *atom;
|
|
|
|
atom = calloc(sizeof(*atom), 1);
|
|
if (!atom)
|
|
die("Non memory");
|
|
|
|
atom->sched_out_time = timestamp;
|
|
|
|
if (sched_out_state(switch_event) == 'R') {
|
|
atom->state = THREAD_WAIT_CPU;
|
|
atom->wake_up_time = atom->sched_out_time;
|
|
}
|
|
|
|
atom->runtime = delta;
|
|
list_add_tail(&atom->list, &atoms->atom_list);
|
|
}
|
|
|
|
static void
|
|
lat_sched_in(struct task_atoms *atoms, u64 timestamp)
|
|
{
|
|
struct work_atom *atom;
|
|
u64 delta;
|
|
|
|
if (list_empty(&atoms->atom_list))
|
|
return;
|
|
|
|
atom = list_entry(atoms->atom_list.prev, struct work_atom, list);
|
|
|
|
if (atom->state != THREAD_WAIT_CPU)
|
|
return;
|
|
|
|
if (timestamp < atom->wake_up_time) {
|
|
atom->state = THREAD_IGNORE;
|
|
return;
|
|
}
|
|
|
|
atom->state = THREAD_SCHED_IN;
|
|
atom->sched_in_time = timestamp;
|
|
|
|
delta = atom->sched_in_time - atom->wake_up_time;
|
|
atoms->total_lat += delta;
|
|
if (delta > atoms->max_lat)
|
|
atoms->max_lat = delta;
|
|
atoms->nb_atoms++;
|
|
atoms->total_runtime += atom->runtime;
|
|
}
|
|
|
|
static void
|
|
latency_switch_event(struct trace_switch_event *switch_event,
|
|
struct event *event __used,
|
|
int cpu,
|
|
u64 timestamp,
|
|
struct thread *thread __used)
|
|
{
|
|
struct task_atoms *out_atoms, *in_atoms;
|
|
struct thread *sched_out, *sched_in;
|
|
u64 timestamp0;
|
|
s64 delta;
|
|
|
|
if (cpu >= MAX_CPUS || cpu < 0)
|
|
return;
|
|
|
|
timestamp0 = cpu_last_switched[cpu];
|
|
cpu_last_switched[cpu] = timestamp;
|
|
if (timestamp0)
|
|
delta = timestamp - timestamp0;
|
|
else
|
|
delta = 0;
|
|
|
|
if (delta < 0)
|
|
die("hm, delta: %Ld < 0 ?\n", delta);
|
|
|
|
|
|
sched_out = threads__findnew(switch_event->prev_pid, &threads, &last_match);
|
|
sched_in = threads__findnew(switch_event->next_pid, &threads, &last_match);
|
|
|
|
in_atoms = thread_atoms_search(&atom_root, sched_in, &cmp_pid);
|
|
if (!in_atoms) {
|
|
thread_atoms_insert(sched_in);
|
|
in_atoms = thread_atoms_search(&atom_root, sched_in, &cmp_pid);
|
|
if (!in_atoms)
|
|
die("in-atom: Internal tree error");
|
|
}
|
|
|
|
out_atoms = thread_atoms_search(&atom_root, sched_out, &cmp_pid);
|
|
if (!out_atoms) {
|
|
thread_atoms_insert(sched_out);
|
|
out_atoms = thread_atoms_search(&atom_root, sched_out, &cmp_pid);
|
|
if (!out_atoms)
|
|
die("out-atom: Internal tree error");
|
|
}
|
|
|
|
lat_sched_in(in_atoms, timestamp);
|
|
lat_sched_out(out_atoms, switch_event, delta, timestamp);
|
|
}
|
|
|
|
static void
|
|
latency_wakeup_event(struct trace_wakeup_event *wakeup_event,
|
|
struct event *event __used,
|
|
int cpu __used,
|
|
u64 timestamp,
|
|
struct thread *thread __used)
|
|
{
|
|
struct task_atoms *atoms;
|
|
struct work_atom *atom;
|
|
struct thread *wakee;
|
|
|
|
/* Note for later, it may be interesting to observe the failing cases */
|
|
if (!wakeup_event->success)
|
|
return;
|
|
|
|
wakee = threads__findnew(wakeup_event->pid, &threads, &last_match);
|
|
atoms = thread_atoms_search(&atom_root, wakee, &cmp_pid);
|
|
if (!atoms) {
|
|
thread_atoms_insert(wakee);
|
|
return;
|
|
}
|
|
|
|
if (list_empty(&atoms->atom_list))
|
|
return;
|
|
|
|
atom = list_entry(atoms->atom_list.prev, struct work_atom, list);
|
|
|
|
if (atom->state != THREAD_SLEEPING)
|
|
return;
|
|
|
|
nr_timestamps++;
|
|
if (atom->sched_out_time > timestamp) {
|
|
unordered_timestamps++;
|
|
return;
|
|
}
|
|
|
|
atom->state = THREAD_WAIT_CPU;
|
|
atom->wake_up_time = timestamp;
|
|
}
|
|
|
|
static struct trace_sched_handler lat_ops = {
|
|
.wakeup_event = latency_wakeup_event,
|
|
.switch_event = latency_switch_event,
|
|
.fork_event = latency_fork_event,
|
|
};
|
|
|
|
static void output_lat_thread(struct task_atoms *atom_list)
|
|
{
|
|
int i;
|
|
int ret;
|
|
u64 avg;
|
|
|
|
if (!atom_list->nb_atoms)
|
|
return;
|
|
/*
|
|
* Ignore idle threads:
|
|
*/
|
|
if (!atom_list->thread->pid)
|
|
return;
|
|
|
|
all_runtime += atom_list->total_runtime;
|
|
all_count += atom_list->nb_atoms;
|
|
|
|
ret = printf(" %s ", atom_list->thread->comm);
|
|
|
|
for (i = 0; i < 19 - ret; i++)
|
|
printf(" ");
|
|
|
|
avg = atom_list->total_lat / atom_list->nb_atoms;
|
|
|
|
printf("|%9.3f ms |%9llu | avg:%9.3f ms | max:%9.3f ms |\n",
|
|
(double)atom_list->total_runtime / 1e6,
|
|
atom_list->nb_atoms, (double)avg / 1e6,
|
|
(double)atom_list->max_lat / 1e6);
|
|
}
|
|
|
|
static int pid_cmp(struct task_atoms *l, struct task_atoms *r)
|
|
{
|
|
if (l->thread->pid < r->thread->pid)
|
|
return -1;
|
|
if (l->thread->pid > r->thread->pid)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct sort_dimension pid_sort_dimension = {
|
|
.name = "pid",
|
|
.cmp = pid_cmp,
|
|
};
|
|
|
|
static int avg_cmp(struct task_atoms *l, struct task_atoms *r)
|
|
{
|
|
u64 avgl, avgr;
|
|
|
|
if (!l->nb_atoms)
|
|
return -1;
|
|
|
|
if (!r->nb_atoms)
|
|
return 1;
|
|
|
|
avgl = l->total_lat / l->nb_atoms;
|
|
avgr = r->total_lat / r->nb_atoms;
|
|
|
|
if (avgl < avgr)
|
|
return -1;
|
|
if (avgl > avgr)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct sort_dimension avg_sort_dimension = {
|
|
.name = "avg",
|
|
.cmp = avg_cmp,
|
|
};
|
|
|
|
static int max_cmp(struct task_atoms *l, struct task_atoms *r)
|
|
{
|
|
if (l->max_lat < r->max_lat)
|
|
return -1;
|
|
if (l->max_lat > r->max_lat)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct sort_dimension max_sort_dimension = {
|
|
.name = "max",
|
|
.cmp = max_cmp,
|
|
};
|
|
|
|
static int switch_cmp(struct task_atoms *l, struct task_atoms *r)
|
|
{
|
|
if (l->nb_atoms < r->nb_atoms)
|
|
return -1;
|
|
if (l->nb_atoms > r->nb_atoms)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct sort_dimension switch_sort_dimension = {
|
|
.name = "switch",
|
|
.cmp = switch_cmp,
|
|
};
|
|
|
|
static int runtime_cmp(struct task_atoms *l, struct task_atoms *r)
|
|
{
|
|
if (l->total_runtime < r->total_runtime)
|
|
return -1;
|
|
if (l->total_runtime > r->total_runtime)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct sort_dimension runtime_sort_dimension = {
|
|
.name = "runtime",
|
|
.cmp = runtime_cmp,
|
|
};
|
|
|
|
static struct sort_dimension *available_sorts[] = {
|
|
&pid_sort_dimension,
|
|
&avg_sort_dimension,
|
|
&max_sort_dimension,
|
|
&switch_sort_dimension,
|
|
&runtime_sort_dimension,
|
|
};
|
|
|
|
#define NB_AVAILABLE_SORTS (int)(sizeof(available_sorts) / sizeof(struct sort_dimension *))
|
|
|
|
static LIST_HEAD(sort_list);
|
|
|
|
static int sort_dimension__add(char *tok, struct list_head *list)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < NB_AVAILABLE_SORTS; i++) {
|
|
if (!strcmp(available_sorts[i]->name, tok)) {
|
|
list_add_tail(&available_sorts[i]->list, list);
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
static void setup_sorting(void);
|
|
|
|
static void sort_lat(void)
|
|
{
|
|
struct rb_node *node;
|
|
|
|
for (;;) {
|
|
struct task_atoms *data;
|
|
node = rb_first(&atom_root);
|
|
if (!node)
|
|
break;
|
|
|
|
rb_erase(node, &atom_root);
|
|
data = rb_entry(node, struct task_atoms, node);
|
|
__thread_latency_insert(&sorted_atom_root, data, &sort_list);
|
|
}
|
|
}
|
|
|
|
static void __cmd_lat(void)
|
|
{
|
|
struct rb_node *next;
|
|
|
|
setup_pager();
|
|
read_events();
|
|
sort_lat();
|
|
|
|
printf("-----------------------------------------------------------------------------------\n");
|
|
printf(" Task | Runtime ms | Switches | Average delay ms | Maximum delay ms |\n");
|
|
printf("-----------------------------------------------------------------------------------\n");
|
|
|
|
next = rb_first(&sorted_atom_root);
|
|
|
|
while (next) {
|
|
struct task_atoms *atom_list;
|
|
|
|
atom_list = rb_entry(next, struct task_atoms, node);
|
|
output_lat_thread(atom_list);
|
|
next = rb_next(next);
|
|
}
|
|
|
|
printf("-----------------------------------------------------------------------------------\n");
|
|
printf(" TOTAL: |%9.3f ms |%9Ld |",
|
|
(double)all_runtime/1e6, all_count);
|
|
|
|
if (unordered_timestamps && nr_timestamps) {
|
|
printf(" INFO: %.2f%% unordered events.\n",
|
|
(double)unordered_timestamps/(double)nr_timestamps*100.0);
|
|
} else {
|
|
printf("\n");
|
|
}
|
|
|
|
printf("---------------------------------------------\n");
|
|
}
|
|
|
|
static struct trace_sched_handler *trace_handler;
|
|
|
|
static void
|
|
process_sched_wakeup_event(struct raw_event_sample *raw,
|
|
struct event *event,
|
|
int cpu __used,
|
|
u64 timestamp __used,
|
|
struct thread *thread __used)
|
|
{
|
|
struct trace_wakeup_event wakeup_event;
|
|
|
|
FILL_COMMON_FIELDS(wakeup_event, event, raw->data);
|
|
|
|
FILL_ARRAY(wakeup_event, comm, event, raw->data);
|
|
FILL_FIELD(wakeup_event, pid, event, raw->data);
|
|
FILL_FIELD(wakeup_event, prio, event, raw->data);
|
|
FILL_FIELD(wakeup_event, success, event, raw->data);
|
|
FILL_FIELD(wakeup_event, cpu, event, raw->data);
|
|
|
|
trace_handler->wakeup_event(&wakeup_event, event, cpu, timestamp, thread);
|
|
}
|
|
|
|
static void
|
|
process_sched_switch_event(struct raw_event_sample *raw,
|
|
struct event *event,
|
|
int cpu __used,
|
|
u64 timestamp __used,
|
|
struct thread *thread __used)
|
|
{
|
|
struct trace_switch_event switch_event;
|
|
|
|
FILL_COMMON_FIELDS(switch_event, event, raw->data);
|
|
|
|
FILL_ARRAY(switch_event, prev_comm, event, raw->data);
|
|
FILL_FIELD(switch_event, prev_pid, event, raw->data);
|
|
FILL_FIELD(switch_event, prev_prio, event, raw->data);
|
|
FILL_FIELD(switch_event, prev_state, event, raw->data);
|
|
FILL_ARRAY(switch_event, next_comm, event, raw->data);
|
|
FILL_FIELD(switch_event, next_pid, event, raw->data);
|
|
FILL_FIELD(switch_event, next_prio, event, raw->data);
|
|
|
|
trace_handler->switch_event(&switch_event, event, cpu, timestamp, thread);
|
|
}
|
|
|
|
static void
|
|
process_sched_fork_event(struct raw_event_sample *raw,
|
|
struct event *event,
|
|
int cpu __used,
|
|
u64 timestamp __used,
|
|
struct thread *thread __used)
|
|
{
|
|
struct trace_fork_event fork_event;
|
|
|
|
FILL_COMMON_FIELDS(fork_event, event, raw->data);
|
|
|
|
FILL_ARRAY(fork_event, parent_comm, event, raw->data);
|
|
FILL_FIELD(fork_event, parent_pid, event, raw->data);
|
|
FILL_ARRAY(fork_event, child_comm, event, raw->data);
|
|
FILL_FIELD(fork_event, child_pid, event, raw->data);
|
|
|
|
trace_handler->fork_event(&fork_event, event, cpu, timestamp, thread);
|
|
}
|
|
|
|
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 raw_event_sample *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(raw, event, cpu, timestamp, thread);
|
|
if (!strcmp(event->name, "sched_wakeup"))
|
|
process_sched_wakeup_event(raw, event, cpu, timestamp, thread);
|
|
if (!strcmp(event->name, "sched_wakeup_new"))
|
|
process_sched_wakeup_event(raw, event, cpu, timestamp, thread);
|
|
if (!strcmp(event->name, "sched_process_fork"))
|
|
process_sched_fork_event(raw, 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 read_events(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 sched_usage[] = {
|
|
"perf sched [<options>] {record|latency|replay|trace}",
|
|
NULL
|
|
};
|
|
|
|
static const struct option sched_options[] = {
|
|
OPT_BOOLEAN('v', "verbose", &verbose,
|
|
"be more verbose (show symbol address, etc)"),
|
|
OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
|
|
"dump raw trace in ASCII"),
|
|
OPT_END()
|
|
};
|
|
|
|
static const char * const latency_usage[] = {
|
|
"perf sched latency [<options>]",
|
|
NULL
|
|
};
|
|
|
|
static const struct option latency_options[] = {
|
|
OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
|
|
"sort by key(s): runtime, switch, avg, max"),
|
|
OPT_BOOLEAN('v', "verbose", &verbose,
|
|
"be more verbose (show symbol address, etc)"),
|
|
OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
|
|
"dump raw trace in ASCII"),
|
|
OPT_END()
|
|
};
|
|
|
|
static const char * const replay_usage[] = {
|
|
"perf sched replay [<options>]",
|
|
NULL
|
|
};
|
|
|
|
static const struct option replay_options[] = {
|
|
OPT_INTEGER('r', "repeat", &replay_repeat,
|
|
"repeat the workload replay N times (-1: infinite)"),
|
|
OPT_BOOLEAN('v', "verbose", &verbose,
|
|
"be more verbose (show symbol address, etc)"),
|
|
OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
|
|
"dump raw trace in ASCII"),
|
|
OPT_END()
|
|
};
|
|
|
|
static void setup_sorting(void)
|
|
{
|
|
char *tmp, *tok, *str = strdup(sort_order);
|
|
|
|
for (tok = strtok_r(str, ", ", &tmp);
|
|
tok; tok = strtok_r(NULL, ", ", &tmp)) {
|
|
if (sort_dimension__add(tok, &sort_list) < 0) {
|
|
error("Unknown --sort key: `%s'", tok);
|
|
usage_with_options(latency_usage, latency_options);
|
|
}
|
|
}
|
|
|
|
free(str);
|
|
|
|
sort_dimension__add((char *)"pid", &cmp_pid);
|
|
}
|
|
|
|
static const char *record_args[] = {
|
|
"record",
|
|
"-a",
|
|
"-R",
|
|
"-M",
|
|
"-f",
|
|
"-c", "1",
|
|
"-e", "sched:sched_switch:r",
|
|
"-e", "sched:sched_stat_wait:r",
|
|
"-e", "sched:sched_stat_sleep:r",
|
|
"-e", "sched:sched_stat_iowait:r",
|
|
"-e", "sched:sched_stat_runtime:r",
|
|
"-e", "sched:sched_process_exit:r",
|
|
"-e", "sched:sched_process_fork:r",
|
|
"-e", "sched:sched_wakeup:r",
|
|
"-e", "sched:sched_migrate_task:r",
|
|
};
|
|
|
|
static int __cmd_record(int argc, const char **argv)
|
|
{
|
|
unsigned int rec_argc, i, j;
|
|
const char **rec_argv;
|
|
|
|
rec_argc = ARRAY_SIZE(record_args) + argc - 1;
|
|
rec_argv = calloc(rec_argc + 1, sizeof(char *));
|
|
|
|
for (i = 0; i < ARRAY_SIZE(record_args); i++)
|
|
rec_argv[i] = strdup(record_args[i]);
|
|
|
|
for (j = 1; j < (unsigned int)argc; j++, i++)
|
|
rec_argv[i] = argv[j];
|
|
|
|
BUG_ON(i != rec_argc);
|
|
|
|
return cmd_record(i, rec_argv, NULL);
|
|
}
|
|
|
|
int cmd_sched(int argc, const char **argv, const char *prefix __used)
|
|
{
|
|
symbol__init();
|
|
page_size = getpagesize();
|
|
|
|
argc = parse_options(argc, argv, sched_options, sched_usage,
|
|
PARSE_OPT_STOP_AT_NON_OPTION);
|
|
if (!argc)
|
|
usage_with_options(sched_usage, sched_options);
|
|
|
|
if (!strncmp(argv[0], "rec", 3)) {
|
|
return __cmd_record(argc, argv);
|
|
} else if (!strncmp(argv[0], "lat", 3)) {
|
|
trace_handler = &lat_ops;
|
|
if (argc > 1) {
|
|
argc = parse_options(argc, argv, latency_options, latency_usage, 0);
|
|
if (argc)
|
|
usage_with_options(latency_usage, latency_options);
|
|
}
|
|
setup_sorting();
|
|
__cmd_lat();
|
|
} else if (!strncmp(argv[0], "rep", 3)) {
|
|
trace_handler = &replay_ops;
|
|
if (argc) {
|
|
argc = parse_options(argc, argv, replay_options, replay_usage, 0);
|
|
if (argc)
|
|
usage_with_options(replay_usage, replay_options);
|
|
}
|
|
__cmd_replay();
|
|
} else if (!strcmp(argv[0], "trace")) {
|
|
/*
|
|
* Aliased to 'perf trace' for now:
|
|
*/
|
|
return cmd_trace(argc, argv, prefix);
|
|
} else {
|
|
usage_with_options(sched_usage, sched_options);
|
|
}
|
|
|
|
return 0;
|
|
}
|