diff options
Diffstat (limited to 'tools/perf/builtin-sched.c')
| -rw-r--r-- | tools/perf/builtin-sched.c | 2004 |
1 files changed, 2004 insertions, 0 deletions
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c new file mode 100644 index 0000000..275d79c --- /dev/null +++ b/tools/perf/builtin-sched.c @@ -0,0 +1,2004 @@ +#include "builtin.h" +#include "perf.h" + +#include "util/util.h" +#include "util/cache.h" +#include "util/symbol.h" +#include "util/thread.h" +#include "util/header.h" + +#include "util/parse-options.h" +#include "util/trace-event.h" + +#include "util/debug.h" + +#include <sys/types.h> +#include <sys/prctl.h> + +#include <semaphore.h> +#include <pthread.h> +#include <math.h> + +static char const *input_name = "perf.data"; +static int input; +static unsigned long page_size; +static unsigned long mmap_window = 32; + +static unsigned long total_comm = 0; + +static struct rb_root threads; +static struct thread *last_match; + +static struct perf_header *header; +static u64 sample_type; + +static char default_sort_order[] = "avg, max, switch, runtime"; +static char *sort_order = default_sort_order; + +#define PR_SET_NAME 15 /* Set process name */ +#define MAX_CPUS 4096 + +#define BUG_ON(x) assert(!(x)) + +static u64 run_measurement_overhead; +static u64 sleep_measurement_overhead; + +#define COMM_LEN 20 +#define SYM_LEN 129 + +#define MAX_PID 65536 + +static unsigned long nr_tasks; + +struct sched_atom; + +struct task_desc { + unsigned long nr; + unsigned long pid; + char comm[COMM_LEN]; + + unsigned long nr_events; + unsigned long curr_event; + struct sched_atom **atoms; + + pthread_t thread; + sem_t sleep_sem; + + sem_t ready_for_work; + sem_t work_done_sem; + + u64 cpu_usage; +}; + +enum sched_event_type { + SCHED_EVENT_RUN, + SCHED_EVENT_SLEEP, + SCHED_EVENT_WAKEUP, +}; + +struct sched_atom { + enum sched_event_type type; + u64 timestamp; + u64 duration; + unsigned long nr; + int specific_wait; + sem_t *wait_sem; + struct task_desc *wakee; +}; + +static struct task_desc *pid_to_task[MAX_PID]; + +static struct task_desc **tasks; + +static pthread_mutex_t start_work_mutex = PTHREAD_MUTEX_INITIALIZER; +static u64 start_time; + +static pthread_mutex_t work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER; + +static unsigned long nr_run_events; +static unsigned long nr_sleep_events; +static unsigned long nr_wakeup_events; + +static unsigned long nr_sleep_corrections; +static unsigned long nr_run_events_optimized; + +static unsigned long targetless_wakeups; +static unsigned long multitarget_wakeups; + +static u64 cpu_usage; +static u64 runavg_cpu_usage; +static u64 parent_cpu_usage; +static u64 runavg_parent_cpu_usage; + +static unsigned long nr_runs; +static u64 sum_runtime; +static u64 sum_fluct; +static u64 run_avg; + +static unsigned long replay_repeat = 10; +static unsigned long nr_timestamps; +static unsigned long nr_unordered_timestamps; +static unsigned long nr_state_machine_bugs; +static unsigned long nr_context_switch_bugs; +static unsigned long nr_events; +static unsigned long nr_lost_chunks; +static unsigned long nr_lost_events; + +#define TASK_STATE_TO_CHAR_STR "RSDTtZX" + +enum thread_state { + THREAD_SLEEPING = 0, + THREAD_WAIT_CPU, + THREAD_SCHED_IN, + THREAD_IGNORE +}; + +struct work_atom { + struct list_head list; + enum thread_state state; + u64 sched_out_time; + u64 wake_up_time; + u64 sched_in_time; + u64 runtime; +}; + +struct work_atoms { + struct list_head work_list; + struct thread *thread; + struct rb_node node; + u64 max_lat; + u64 total_lat; + u64 nb_atoms; + u64 total_runtime; +}; + +typedef int (*sort_fn_t)(struct work_atoms *, struct work_atoms *); + +static struct rb_root atom_root, sorted_atom_root; + +static u64 all_runtime; +static u64 all_count; + + +static u64 get_nsecs(void) +{ + struct timespec ts; + + clock_gettime(CLOCK_MONOTONIC, &ts); + + return ts.tv_sec * 1000000000ULL + ts.tv_nsec; +} + +static void burn_nsecs(u64 nsecs) +{ + u64 T0 = get_nsecs(), T1; + + do { + T1 = get_nsecs(); + } while (T1 + run_measurement_overhead < T0 + nsecs); +} + +static void sleep_nsecs(u64 nsecs) +{ + struct timespec ts; + + ts.tv_nsec = nsecs % 999999999; + ts.tv_sec = nsecs / 999999999; + + nanosleep(&ts, NULL); +} + +static void calibrate_run_measurement_overhead(void) +{ + u64 T0, T1, delta, min_delta = 1000000000ULL; + int i; + + for (i = 0; i < 10; i++) { + T0 = get_nsecs(); + burn_nsecs(0); + T1 = get_nsecs(); + delta = T1-T0; + min_delta = min(min_delta, delta); + } + run_measurement_overhead = min_delta; + + printf("run measurement overhead: %Ld nsecs\n", min_delta); +} + +static void calibrate_sleep_measurement_overhead(void) +{ + u64 T0, T1, delta, min_delta = 1000000000ULL; + int i; + + for (i = 0; i < 10; i++) { + T0 = get_nsecs(); + sleep_nsecs(10000); + T1 = get_nsecs(); + delta = T1-T0; + min_delta = min(min_delta, delta); + } + min_delta -= 10000; + sleep_measurement_overhead = min_delta; + + printf("sleep measurement overhead: %Ld nsecs\n", min_delta); +} + +static struct sched_atom * +get_new_event(struct task_desc *task, u64 timestamp) +{ + struct sched_atom *event = calloc(1, sizeof(*event)); + unsigned long idx = task->nr_events; + size_t size; + + event->timestamp = timestamp; + event->nr = idx; + + task->nr_events++; + size = sizeof(struct sched_atom *) * task->nr_events; + task->atoms = realloc(task->atoms, size); + BUG_ON(!task->atoms); + + task->atoms[idx] = event; + + return event; +} + +static struct sched_atom *last_event(struct task_desc *task) +{ + if (!task->nr_events) + return NULL; + + return task->atoms[task->nr_events - 1]; +} + +static void +add_sched_event_run(struct task_desc *task, u64 timestamp, u64 duration) +{ + struct sched_atom *event, *curr_event = last_event(task); + + /* + * optimize an existing RUN event by merging this one + * to it: + */ + if (curr_event && curr_event->type == SCHED_EVENT_RUN) { + nr_run_events_optimized++; + curr_event->duration += duration; + return; + } + + event = get_new_event(task, timestamp); + + event->type = SCHED_EVENT_RUN; + event->duration = duration; + + nr_run_events++; +} + +static void +add_sched_event_wakeup(struct task_desc *task, u64 timestamp, + struct task_desc *wakee) +{ + struct sched_atom *event, *wakee_event; + + event = get_new_event(task, timestamp); + event->type = SCHED_EVENT_WAKEUP; + event->wakee = wakee; + + wakee_event = last_event(wakee); + if (!wakee_event || wakee_event->type != SCHED_EVENT_SLEEP) { + targetless_wakeups++; + return; + } + if (wakee_event->wait_sem) { + multitarget_wakeups++; + return; + } + + wakee_event->wait_sem = calloc(1, sizeof(*wakee_event->wait_sem)); + sem_init(wakee_event->wait_sem, 0, 0); + wakee_event->specific_wait = 1; + event->wait_sem = wakee_event->wait_sem; + + nr_wakeup_events++; +} + +static void +add_sched_event_sleep(struct task_desc *task, u64 timestamp, + u64 task_state __used) +{ + struct sched_atom *event = get_new_event(task, timestamp); + + event->type = SCHED_EVENT_SLEEP; + + nr_sleep_events++; +} + +static struct task_desc *register_pid(unsigned long pid, const char *comm) +{ + struct task_desc *task; + + BUG_ON(pid >= MAX_PID); + + task = pid_to_task[pid]; + + if (task) + return task; + + task = calloc(1, sizeof(*task)); + task->pid = pid; + task->nr = nr_tasks; + strcpy(task->comm, comm); + /* + * every task starts in sleeping state - this gets ignored + * if there's no wakeup pointing to this sleep state: + */ + add_sched_event_sleep(task, 0, 0); + + pid_to_task[pid] = task; + nr_tasks++; + tasks = realloc(tasks, nr_tasks*sizeof(struct task_task *)); + BUG_ON(!tasks); + tasks[task->nr] = task; + + if (verbose) + printf("registered task #%ld, PID %ld (%s)\n", nr_tasks, pid, comm); + + return task; +} + + +static void print_task_traces(void) +{ + struct task_desc *task; + unsigned long i; + + for (i = 0; i < nr_tasks; i++) { + task = tasks[i]; + printf("task %6ld (%20s:%10ld), nr_events: %ld\n", + task->nr, task->comm, task->pid, task->nr_events); + } +} + +static void add_cross_task_wakeups(void) +{ + struct task_desc *task1, *task2; + unsigned long i, j; + + for (i = 0; i < nr_tasks; i++) { + task1 = tasks[i]; + j = i + 1; + if (j == nr_tasks) + j = 0; + task2 = tasks[j]; + add_sched_event_wakeup(task1, 0, task2); + } +} + +static void +process_sched_event(struct task_desc *this_task __used, struct sched_atom *atom) +{ + int ret = 0; + u64 now; + long long delta; + + now = get_nsecs(); + delta = start_time + atom->timestamp - now; + + switch (atom->type) { + case SCHED_EVENT_RUN: + burn_nsecs(atom->duration); + break; + case SCHED_EVENT_SLEEP: + if (atom->wait_sem) + ret = sem_wait(atom->wait_sem); + BUG_ON(ret); + break; + case SCHED_EVENT_WAKEUP: + if (atom->wait_sem) + ret = sem_post(atom->wait_sem); + BUG_ON(ret); + break; + default: + BUG_ON(1); + } +} + +static u64 get_cpu_usage_nsec_parent(void) +{ + struct rusage ru; + u64 sum; + int err; + + err = getrusage(RUSAGE_SELF, &ru); + BUG_ON(err); + + sum = ru.ru_utime.tv_sec*1e9 + ru.ru_utime.tv_usec*1e3; + sum += ru.ru_stime.tv_sec*1e9 + ru.ru_stime.tv_usec*1e3; + + return sum; +} + +static u64 get_cpu_usage_nsec_self(void) +{ + char filename [] = "/proc/1234567890/sched"; + unsigned long msecs, nsecs; + char *line = NULL; + u64 total = 0; + size_t len = 0; + ssize_t chars; + FILE *file; + int ret; + + sprintf(filename, "/proc/%d/sched", getpid()); + file = fopen(filename, "r"); + BUG_ON(!file); + + while ((chars = getline(&line, &len, file)) != -1) { + ret = sscanf(line, "se.sum_exec_runtime : %ld.%06ld\n", + &msecs, &nsecs); + if (ret == 2) { + total = msecs*1e6 + nsecs; + break; + } + } + if (line) + free(line); + fclose(file); + + return total; +} + +static void *thread_func(void *ctx) +{ + struct task_desc *this_task = ctx; + u64 cpu_usage_0, cpu_usage_1; + unsigned long i, ret; + char comm2[22]; + + sprintf(comm2, ":%s", this_task->comm); + prctl(PR_SET_NAME, comm2); + +again: + ret = sem_post(&this_task->ready_for_work); + BUG_ON(ret); + ret = pthread_mutex_lock(&start_work_mutex); + BUG_ON(ret); + ret = pthread_mutex_unlock(&start_work_mutex); + BUG_ON(ret); + + cpu_usage_0 = get_cpu_usage_nsec_self(); + + for (i = 0; i < this_task->nr_events; i++) { + this_task->curr_event = i; + process_sched_event(this_task, this_task->atoms[i]); + } + + cpu_usage_1 = get_cpu_usage_nsec_self(); + this_task->cpu_usage = cpu_usage_1 - cpu_usage_0; + + ret = sem_post(&this_task->work_done_sem); + BUG_ON(ret); + + ret = pthread_mutex_lock(&work_done_wait_mutex); + BUG_ON(ret); + ret = pthread_mutex_unlock(&work_done_wait_mutex); + BUG_ON(ret); + + goto again; +} + +static void create_tasks(void) +{ + struct task_desc *task; + pthread_attr_t attr; + unsigned long i; + int err; + + err = pthread_attr_init(&attr); + BUG_ON(err); + err = pthread_attr_setstacksize(&attr, (size_t)(16*1024)); + BUG_ON(err); + err = pthread_mutex_lock(&start_work_mutex); + BUG_ON(err); + err = pthread_mutex_lock(&work_done_wait_mutex); + BUG_ON(err); + for (i = 0; i < nr_tasks; i++) { + task = tasks[i]; + sem_init(&task->sleep_sem, 0, 0); + sem_init(&task->ready_for_work, 0, 0); + sem_init(&task->work_done_sem, 0, 0); + task->curr_event = 0; + err = pthread_create(&task->thread, &attr, thread_func, task); + BUG_ON(err); + } +} + +static void wait_for_tasks(void) +{ + u64 cpu_usage_0, cpu_usage_1; + struct task_desc *task; + unsigned long i, ret; + + start_time = get_nsecs(); + cpu_usage = 0; + pthread_mutex_unlock(&work_done_wait_mutex); + + for (i = 0; i < nr_tasks; i++) { + task = tasks[i]; + ret = sem_wait(&task->ready_for_work); + BUG_ON(ret); + sem_init(&task->ready_for_work, 0, 0); + } + ret = pthread_mutex_lock(&work_done_wait_mutex); + BUG_ON(ret); + + cpu_usage_0 = get_cpu_usage_nsec_parent(); + + pthread_mutex_unlock(&start_work_mutex); + + for (i = 0; i < nr_tasks; i++) { + task = tasks[i]; + ret = sem_wait(&task->work_done_sem); + BUG_ON(ret); + sem_init(&task->work_done_sem, 0, 0); + cpu_usage += task->cpu_usage; + task->cpu_usage = 0; + } + + cpu_usage_1 = get_cpu_usage_nsec_parent(); + if (!runavg_cpu_usage) + runavg_cpu_usage = cpu_usage; + runavg_cpu_usage = (runavg_cpu_usage*9 + cpu_usage)/10; + + parent_cpu_usage = cpu_usage_1 - cpu_usage_0; + if (!runavg_parent_cpu_usage) + runavg_parent_cpu_usage = parent_cpu_usage; + runavg_parent_cpu_usage = (runavg_parent_cpu_usage*9 + + parent_cpu_usage)/10; + + ret = pthread_mutex_lock(&start_work_mutex); + BUG_ON(ret); + + for (i = 0; i < nr_tasks; i++) { + task = tasks[i]; + sem_init(&task->sleep_sem, 0, 0); + task->curr_event = 0; + } +} + +static void run_one_test(void) +{ + 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 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_runtime_event { + u32 size; + + u16 common_type; + u8 common_flags; + u8 common_preempt_count; + u32 common_pid; + u32 common_tgid; + + char comm[16]; + u32 pid; + u64 runtime; + u64 vruntime; +}; + +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 (*runtime_event)(struct trace_runtime_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 u64 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 work_atoms *l, struct work_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 work_atoms * +thread_atoms_search(struct rb_root *root, struct thread *thread, + struct list_head *sort_list) +{ + struct rb_node *node = root->rb_node; + struct work_atoms key = { .thread = thread }; + + while (node) { + struct work_atoms *atoms; + int cmp; + + atoms = container_of(node, struct work_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 work_atoms *data, + struct list_head *sort_list) +{ + struct rb_node **new = &(root->rb_node), *parent = NULL; + + while (*new) { + struct work_atoms *this; + int cmp; + + this = container_of(*new, struct work_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 work_atoms *atoms; + + atoms = calloc(sizeof(*atoms), 1); + if (!atoms) + die("No memory"); + + atoms->thread = thread; + INIT_LIST_HEAD(&atoms->work_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 +add_sched_out_event(struct work_atoms *atoms, + char run_state, + u64 timestamp) +{ + struct work_atom *atom; + + atom = calloc(sizeof(*atom), 1); + if (!atom) + die("Non memory"); + + atom->sched_out_time = timestamp; + + if (run_state == 'R') { + atom->state = THREAD_WAIT_CPU; + atom->wake_up_time = atom->sched_out_time; + } + + list_add_tail(&atom->list, &atoms->work_list); +} + +static void +add_runtime_event(struct work_atoms *atoms, u64 delta, u64 timestamp __used) +{ + struct work_atom *atom; + + BUG_ON(list_empty(&atoms->work_list)); + + atom = list_entry(atoms->work_list.prev, struct work_atom, list); + + atom->runtime += delta; + atoms->total_runtime += delta; +} + +static void +add_sched_in_event(struct work_atoms *atoms, u64 timestamp) +{ + struct work_atom *atom; + u64 delta; + + if (list_empty(&atoms->work_list)) + return; + + atom = list_entry(atoms->work_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++; +} + +static void +latency_switch_event(struct trace_switch_event *switch_event, + struct event *event __used, + int cpu, + u64 timestamp, + struct thread *thread __used) +{ + struct work_atoms *out_events, *in_events; + struct thread *sched_out, *sched_in; + u64 timestamp0; + s64 delta; + + BUG_ON(cpu >= MAX_CPUS || cpu < 0); + + 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); + + out_events = thread_atoms_search(&atom_root, sched_out, &cmp_pid); + if (!out_events) { + thread_atoms_insert(sched_out); + out_events = thread_atoms_search(&atom_root, sched_out, &cmp_pid); + if (!out_events) + die("out-event: Internal tree error"); + } + add_sched_out_event(out_events, sched_out_state(switch_event), timestamp); + + in_events = thread_atoms_search(&atom_root, sched_in, &cmp_pid); + if (!in_events) { + thread_atoms_insert(sched_in); + in_events = thread_atoms_search(&atom_root, sched_in, &cmp_pid); + if (!in_events) + die("in-event: Internal tree error"); + /* + * Take came in we have not heard about yet, + * add in an initial atom in runnable state: + */ + add_sched_out_event(in_events, 'R', timestamp); + } + add_sched_in_event(in_events, timestamp); +} + +static void +latency_runtime_event(struct trace_runtime_event *runtime_event, + struct event *event __used, + int cpu, + u64 timestamp, + struct thread *this_thread __used) +{ + struct work_atoms *atoms; + struct thread *thread; + + BUG_ON(cpu >= MAX_CPUS || cpu < 0); + + thread = threads__findnew(runtime_event->pid, &threads, &last_match); + atoms = thread_atoms_search(&atom_root, thread, &cmp_pid); + if (!atoms) { + thread_atoms_insert(thread); + atoms = thread_atoms_search(&atom_root, thread, &cmp_pid); + if (!atoms) + die("in-event: Internal tree error"); + add_sched_out_event(atoms, 'R', timestamp); + } + + add_runtime_event(atoms, runtime_event->runtime, 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 work_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); + atoms = thread_atoms_search(&atom_root, wakee, &cmp_pid); + if (!atoms) + die("wakeup-event: Internal tree error"); + add_sched_out_event(atoms, 'S', timestamp); + } + + BUG_ON(list_empty(&atoms->work_list)); + + atom = list_entry(atoms->work_list.prev, struct work_atom, list); + + if (atom->state != THREAD_SLEEPING) + nr_state_machine_bugs++; + + nr_timestamps++; + if (atom->sched_out_time > timestamp) { + nr_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, + .runtime_event = latency_runtime_event, + .fork_event = latency_fork_event, +}; + +static void output_lat_thread(struct work_atoms *work_list) +{ + int i; + int ret; + u64 avg; + + if (!work_list->nb_atoms) + return; + /* + * Ignore idle threads: + */ + if (!strcmp(work_list->thread->comm, "swapper")) + return; + + all_runtime += work_list->total_runtime; + all_count += work_list->nb_atoms; + + ret = printf(" %s:%d ", work_list->thread->comm, work_list->thread->pid); + + for (i = 0; i < 24 - ret; i++) + printf(" "); + + avg = work_list->total_lat / work_list->nb_atoms; + + printf("|%11.3f ms |%9llu | avg:%9.3f ms | max:%9.3f ms |\n", + (double)work_list->total_runtime / 1e6, + work_list->nb_atoms, (double)avg / 1e6, + (double)work_list->max_lat / 1e6); +} + +static int pid_cmp(struct work_atoms *l, struct work_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 work_atoms *l, struct work_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 work_atoms *l, struct work_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 work_atoms *l, struct work_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 work_atoms *l, struct work_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 work_atoms *data; + node = rb_first(&atom_root); + if (!node) + break; + + rb_erase(node, &atom_root); + data = rb_entry(node, struct work_atoms, node); + __thread_latency_insert(&sorted_atom_root, data, &sort_list); + } +} + +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); + + if (trace_handler->wakeup_event) + trace_handler->wakeup_event(&wakeup_event, event, cpu, timestamp, thread); +} + +/* + * Track the current task - that way we can know whether there's any + * weird events, such as a task being switched away that is not current. + */ +static int max_cpu; + +static u32 curr_pid[MAX_CPUS] = { [0 ... MAX_CPUS-1] = -1 }; + +static struct thread *curr_thread[MAX_CPUS]; + +static char next_shortname1 = 'A'; +static char next_shortname2 = '0'; + +static void +map_switch_event(struct trace_switch_event *switch_event, + struct event *event __used, + int this_cpu, + u64 timestamp, + struct thread *thread __used) +{ + struct thread *sched_out, *sched_in; + int new_shortname; + u64 timestamp0; + s64 delta; + int cpu; + + BUG_ON(this_cpu >= MAX_CPUS || this_cpu < 0); + + if (this_cpu > max_cpu) + max_cpu = this_cpu; + + timestamp0 = cpu_last_switched[this_cpu]; + cpu_last_switched[this_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); + + curr_thread[this_cpu] = sched_in; + + printf(" "); + + new_shortname = 0; + if (!sched_in->shortname[0]) { + sched_in->shortname[0] = next_shortname1; + sched_in->shortname[1] = next_shortname2; + + if (next_shortname1 < 'Z') { + next_shortname1++; + } else { + next_shortname1='A'; + if (next_shortname2 < '9') { + next_shortname2++; + } else { + next_shortname2='0'; + } + } + new_shortname = 1; + } + + for (cpu = 0; cpu <= max_cpu; cpu++) { + if (cpu != this_cpu) + printf(" "); + else + printf("*"); + + if (curr_thread[cpu]) { + if (curr_thread[cpu]->pid) + printf("%2s ", curr_thread[cpu]->shortname); + else + printf(". "); + } else + printf(" "); + } + + printf(" %12.6f secs ", (double)timestamp/1e9); + if (new_shortname) { + printf("%s => %s:%d\n", + sched_in->shortname, sched_in->comm, sched_in->pid); + } else { + printf("\n"); + } +} + + +static void +process_sched_switch_event(struct raw_event_sample *raw, + struct event *event, + int this_cpu, + 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); + + if (curr_pid[this_cpu] != (u32)-1) { + /* + * Are we trying to switch away a PID that is + * not current? + */ + if (curr_pid[this_cpu] != switch_event.prev_pid) + nr_context_switch_bugs++; + } + if (trace_handler->switch_event) + trace_handler->switch_event(&switch_event, event, this_cpu, timestamp, thread); + + curr_pid[this_cpu] = switch_event.next_pid; +} + +static void +process_sched_runtime_event(struct raw_event_sample *raw, + struct event *event, + int cpu __used, + u64 timestamp __used, + struct thread *thread __used) +{ + struct trace_runtime_event runtime_event; + + FILL_ARRAY(runtime_event, comm, event, raw->data); + FILL_FIELD(runtime_event, pid, event, raw->data); + FILL_FIELD(runtime_event, runtime, event, raw->data); + FILL_FIELD(runtime_event, vruntime, event, raw->data); + + if (trace_handler->runtime_event) + trace_handler->runtime_event(&runtime_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); + + if (trace_handler->fork_event) + 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_stat_runtime")) + process_sched_runtime_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); + + nr_events++; + switch (event->header.type) { + case PERF_EVENT_MMAP: + return 0; + case PERF_EVENT_LOST: + nr_lost_chunks++; + nr_lost_events += event->lost.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 void print_bad_events(void) +{ + if (nr_unordered_timestamps && nr_timestamps) { + printf(" INFO: %.3f%% unordered timestamps (%ld out of %ld)\n", + (double)nr_unordered_timestamps/(double)nr_timestamps*100.0, + nr_unordered_timestamps, nr_timestamps); + } + if (nr_lost_events && nr_events) { + printf(" INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n", + (double)nr_lost_events/(double)nr_events*100.0, + nr_lost_events, nr_events, nr_lost_chunks); + } + if (nr_state_machine_bugs && nr_timestamps) { + printf(" INFO: %.3f%% state machine bugs (%ld out of %ld)", + (double)nr_state_machine_bugs/(double)nr_timestamps*100.0, + nr_state_machine_bugs, nr_timestamps); + if (nr_lost_events) + printf(" (due to lost events?)"); + printf("\n"); + } + if (nr_context_switch_bugs && nr_timestamps) { + printf(" INFO: %.3f%% context switch bugs (%ld out of %ld)", + (double)nr_context_switch_bugs/(double)nr_timestamps*100.0, + nr_context_switch_bugs, nr_timestamps); + if (nr_lost_events) + printf(" (due to lost events?)"); + printf("\n"); + } +} + +static void __cmd_lat(void) +{ + struct rb_node *next; + + setup_pager(); + read_events(); + sort_lat(); + + printf("\n -----------------------------------------------------------------------------------------\n"); + printf(" Task | Runtime ms | Switches | Average delay ms | Maximum delay ms |\n"); + printf(" -----------------------------------------------------------------------------------------\n"); + + next = rb_first(&sorted_atom_root); + + while (next) { + struct work_atoms *work_list; + + work_list = rb_entry(next, struct work_atoms, node); + output_lat_thread(work_list); + next = rb_next(next); + } + + printf(" -----------------------------------------------------------------------------------------\n"); + printf(" TOTAL: |%11.3f ms |%9Ld |\n", + (double)all_runtime/1e6, all_count); + + printf(" ---------------------------------------------------\n"); + + print_bad_events(); + printf("\n"); + +} + +static struct trace_sched_handler map_ops = { + .wakeup_event = NULL, + .switch_event = map_switch_event, + .runtime_event = NULL, + .fork_event = NULL, +}; + +static void __cmd_map(void) +{ + max_cpu = sysconf(_SC_NPROCESSORS_CONF); + + setup_pager(); + read_events(); + print_bad_events(); +} + +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 atoms 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 const char * const sched_usage[] = { + "perf sched [<options>] {record|latency|map|replay|trace}", + NULL +}; + +static const struct option sched_options[] = { + OPT_STRING('i', "input", &input_name, "file", + "input file name"), + 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", + "-m", "1024", + "-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 (!strcmp(argv[0], "map")) { + trace_handler = &map_ops; + setup_sorting(); + __cmd_map(); + } 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; +} |