diff options
Diffstat (limited to 'kernel/tools/perf/builtin-sched.c')
| -rw-r--r-- | kernel/tools/perf/builtin-sched.c | 1808 |
1 files changed, 1808 insertions, 0 deletions
diff --git a/kernel/tools/perf/builtin-sched.c b/kernel/tools/perf/builtin-sched.c new file mode 100644 index 000000000..5275bab70 --- /dev/null +++ b/kernel/tools/perf/builtin-sched.c @@ -0,0 +1,1808 @@ +#include "builtin.h" +#include "perf.h" + +#include "util/util.h" +#include "util/evlist.h" +#include "util/cache.h" +#include "util/evsel.h" +#include "util/symbol.h" +#include "util/thread.h" +#include "util/header.h" +#include "util/session.h" +#include "util/tool.h" +#include "util/cloexec.h" + +#include "util/parse-options.h" +#include "util/trace-event.h" + +#include "util/debug.h" + +#include <sys/prctl.h> +#include <sys/resource.h> + +#include <semaphore.h> +#include <pthread.h> +#include <math.h> +#include <api/fs/fs.h> + +#define PR_SET_NAME 15 /* Set process name */ +#define MAX_CPUS 4096 +#define COMM_LEN 20 +#define SYM_LEN 129 +#define MAX_PID 1024000 + +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, + SCHED_EVENT_MIGRATION, +}; + +struct sched_atom { + enum sched_event_type type; + int specific_wait; + u64 timestamp; + u64 duration; + unsigned long nr; + sem_t *wait_sem; + struct task_desc *wakee; +}; + +#define TASK_STATE_TO_CHAR_STR "RSDTtZXxKWP" + +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 max_lat_at; + u64 total_lat; + u64 nb_atoms; + u64 total_runtime; +}; + +typedef int (*sort_fn_t)(struct work_atoms *, struct work_atoms *); + +struct perf_sched; + +struct trace_sched_handler { + int (*switch_event)(struct perf_sched *sched, struct perf_evsel *evsel, + struct perf_sample *sample, struct machine *machine); + + int (*runtime_event)(struct perf_sched *sched, struct perf_evsel *evsel, + struct perf_sample *sample, struct machine *machine); + + int (*wakeup_event)(struct perf_sched *sched, struct perf_evsel *evsel, + struct perf_sample *sample, struct machine *machine); + + /* PERF_RECORD_FORK event, not sched_process_fork tracepoint */ + int (*fork_event)(struct perf_sched *sched, union perf_event *event, + struct machine *machine); + + int (*migrate_task_event)(struct perf_sched *sched, + struct perf_evsel *evsel, + struct perf_sample *sample, + struct machine *machine); +}; + +struct perf_sched { + struct perf_tool tool; + const char *sort_order; + unsigned long nr_tasks; + struct task_desc **pid_to_task; + struct task_desc **tasks; + const struct trace_sched_handler *tp_handler; + pthread_mutex_t start_work_mutex; + pthread_mutex_t work_done_wait_mutex; + int profile_cpu; +/* + * 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. + */ + int max_cpu; + u32 curr_pid[MAX_CPUS]; + struct thread *curr_thread[MAX_CPUS]; + char next_shortname1; + char next_shortname2; + unsigned int replay_repeat; + unsigned long nr_run_events; + unsigned long nr_sleep_events; + unsigned long nr_wakeup_events; + unsigned long nr_sleep_corrections; + unsigned long nr_run_events_optimized; + unsigned long targetless_wakeups; + unsigned long multitarget_wakeups; + unsigned long nr_runs; + unsigned long nr_timestamps; + unsigned long nr_unordered_timestamps; + unsigned long nr_context_switch_bugs; + unsigned long nr_events; + unsigned long nr_lost_chunks; + unsigned long nr_lost_events; + u64 run_measurement_overhead; + u64 sleep_measurement_overhead; + u64 start_time; + u64 cpu_usage; + u64 runavg_cpu_usage; + u64 parent_cpu_usage; + u64 runavg_parent_cpu_usage; + u64 sum_runtime; + u64 sum_fluct; + u64 run_avg; + u64 all_runtime; + u64 all_count; + u64 cpu_last_switched[MAX_CPUS]; + struct rb_root atom_root, sorted_atom_root; + struct list_head sort_list, cmp_pid; + bool force; +}; + +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(struct perf_sched *sched, u64 nsecs) +{ + u64 T0 = get_nsecs(), T1; + + do { + T1 = get_nsecs(); + } while (T1 + sched->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(struct perf_sched *sched) +{ + u64 T0, T1, delta, min_delta = 1000000000ULL; + int i; + + for (i = 0; i < 10; i++) { + T0 = get_nsecs(); + burn_nsecs(sched, 0); + T1 = get_nsecs(); + delta = T1-T0; + min_delta = min(min_delta, delta); + } + sched->run_measurement_overhead = min_delta; + + printf("run measurement overhead: %" PRIu64 " nsecs\n", min_delta); +} + +static void calibrate_sleep_measurement_overhead(struct perf_sched *sched) +{ + 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; + sched->sleep_measurement_overhead = min_delta; + + printf("sleep measurement overhead: %" PRIu64 " nsecs\n", min_delta); +} + +static struct sched_atom * +get_new_event(struct task_desc *task, u64 timestamp) +{ + struct sched_atom *event = zalloc(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 perf_sched *sched, 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) { + sched->nr_run_events_optimized++; + curr_event->duration += duration; + return; + } + + event = get_new_event(task, timestamp); + + event->type = SCHED_EVENT_RUN; + event->duration = duration; + + sched->nr_run_events++; +} + +static void add_sched_event_wakeup(struct perf_sched *sched, 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) { + sched->targetless_wakeups++; + return; + } + if (wakee_event->wait_sem) { + sched->multitarget_wakeups++; + return; + } + + wakee_event->wait_sem = zalloc(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; + + sched->nr_wakeup_events++; +} + +static void add_sched_event_sleep(struct perf_sched *sched, struct task_desc *task, + u64 timestamp, u64 task_state __maybe_unused) +{ + struct sched_atom *event = get_new_event(task, timestamp); + + event->type = SCHED_EVENT_SLEEP; + + sched->nr_sleep_events++; +} + +static struct task_desc *register_pid(struct perf_sched *sched, + unsigned long pid, const char *comm) +{ + struct task_desc *task; + static int pid_max; + + if (sched->pid_to_task == NULL) { + if (sysctl__read_int("kernel/pid_max", &pid_max) < 0) + pid_max = MAX_PID; + BUG_ON((sched->pid_to_task = calloc(pid_max, sizeof(struct task_desc *))) == NULL); + } + if (pid >= (unsigned long)pid_max) { + BUG_ON((sched->pid_to_task = realloc(sched->pid_to_task, (pid + 1) * + sizeof(struct task_desc *))) == NULL); + while (pid >= (unsigned long)pid_max) + sched->pid_to_task[pid_max++] = NULL; + } + + task = sched->pid_to_task[pid]; + + if (task) + return task; + + task = zalloc(sizeof(*task)); + task->pid = pid; + task->nr = sched->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(sched, task, 0, 0); + + sched->pid_to_task[pid] = task; + sched->nr_tasks++; + sched->tasks = realloc(sched->tasks, sched->nr_tasks * sizeof(struct task_desc *)); + BUG_ON(!sched->tasks); + sched->tasks[task->nr] = task; + + if (verbose) + printf("registered task #%ld, PID %ld (%s)\n", sched->nr_tasks, pid, comm); + + return task; +} + + +static void print_task_traces(struct perf_sched *sched) +{ + struct task_desc *task; + unsigned long i; + + for (i = 0; i < sched->nr_tasks; i++) { + task = sched->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(struct perf_sched *sched) +{ + struct task_desc *task1, *task2; + unsigned long i, j; + + for (i = 0; i < sched->nr_tasks; i++) { + task1 = sched->tasks[i]; + j = i + 1; + if (j == sched->nr_tasks) + j = 0; + task2 = sched->tasks[j]; + add_sched_event_wakeup(sched, task1, 0, task2); + } +} + +static void perf_sched__process_event(struct perf_sched *sched, + struct sched_atom *atom) +{ + int ret = 0; + + switch (atom->type) { + case SCHED_EVENT_RUN: + burn_nsecs(sched, 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; + case SCHED_EVENT_MIGRATION: + 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 int self_open_counters(struct perf_sched *sched, unsigned long cur_task) +{ + struct perf_event_attr attr; + char sbuf[STRERR_BUFSIZE], info[STRERR_BUFSIZE]; + int fd; + struct rlimit limit; + bool need_privilege = false; + + memset(&attr, 0, sizeof(attr)); + + attr.type = PERF_TYPE_SOFTWARE; + attr.config = PERF_COUNT_SW_TASK_CLOCK; + +force_again: + fd = sys_perf_event_open(&attr, 0, -1, -1, + perf_event_open_cloexec_flag()); + + if (fd < 0) { + if (errno == EMFILE) { + if (sched->force) { + BUG_ON(getrlimit(RLIMIT_NOFILE, &limit) == -1); + limit.rlim_cur += sched->nr_tasks - cur_task; + if (limit.rlim_cur > limit.rlim_max) { + limit.rlim_max = limit.rlim_cur; + need_privilege = true; + } + if (setrlimit(RLIMIT_NOFILE, &limit) == -1) { + if (need_privilege && errno == EPERM) + strcpy(info, "Need privilege\n"); + } else + goto force_again; + } else + strcpy(info, "Have a try with -f option\n"); + } + pr_err("Error: sys_perf_event_open() syscall returned " + "with %d (%s)\n%s", fd, + strerror_r(errno, sbuf, sizeof(sbuf)), info); + exit(EXIT_FAILURE); + } + return fd; +} + +static u64 get_cpu_usage_nsec_self(int fd) +{ + u64 runtime; + int ret; + + ret = read(fd, &runtime, sizeof(runtime)); + BUG_ON(ret != sizeof(runtime)); + + return runtime; +} + +struct sched_thread_parms { + struct task_desc *task; + struct perf_sched *sched; + int fd; +}; + +static void *thread_func(void *ctx) +{ + struct sched_thread_parms *parms = ctx; + struct task_desc *this_task = parms->task; + struct perf_sched *sched = parms->sched; + u64 cpu_usage_0, cpu_usage_1; + unsigned long i, ret; + char comm2[22]; + int fd = parms->fd; + + zfree(&parms); + + sprintf(comm2, ":%s", this_task->comm); + prctl(PR_SET_NAME, comm2); + if (fd < 0) + return NULL; +again: + ret = sem_post(&this_task->ready_for_work); + BUG_ON(ret); + ret = pthread_mutex_lock(&sched->start_work_mutex); + BUG_ON(ret); + ret = pthread_mutex_unlock(&sched->start_work_mutex); + BUG_ON(ret); + + cpu_usage_0 = get_cpu_usage_nsec_self(fd); + + for (i = 0; i < this_task->nr_events; i++) { + this_task->curr_event = i; + perf_sched__process_event(sched, this_task->atoms[i]); + } + + cpu_usage_1 = get_cpu_usage_nsec_self(fd); + 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(&sched->work_done_wait_mutex); + BUG_ON(ret); + ret = pthread_mutex_unlock(&sched->work_done_wait_mutex); + BUG_ON(ret); + + goto again; +} + +static void create_tasks(struct perf_sched *sched) +{ + 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) max(16 * 1024, PTHREAD_STACK_MIN)); + BUG_ON(err); + err = pthread_mutex_lock(&sched->start_work_mutex); + BUG_ON(err); + err = pthread_mutex_lock(&sched->work_done_wait_mutex); + BUG_ON(err); + for (i = 0; i < sched->nr_tasks; i++) { + struct sched_thread_parms *parms = malloc(sizeof(*parms)); + BUG_ON(parms == NULL); + parms->task = task = sched->tasks[i]; + parms->sched = sched; + parms->fd = self_open_counters(sched, 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, parms); + BUG_ON(err); + } +} + +static void wait_for_tasks(struct perf_sched *sched) +{ + u64 cpu_usage_0, cpu_usage_1; + struct task_desc *task; + unsigned long i, ret; + + sched->start_time = get_nsecs(); + sched->cpu_usage = 0; + pthread_mutex_unlock(&sched->work_done_wait_mutex); + + for (i = 0; i < sched->nr_tasks; i++) { + task = sched->tasks[i]; + ret = sem_wait(&task->ready_for_work); + BUG_ON(ret); + sem_init(&task->ready_for_work, 0, 0); + } + ret = pthread_mutex_lock(&sched->work_done_wait_mutex); + BUG_ON(ret); + + cpu_usage_0 = get_cpu_usage_nsec_parent(); + + pthread_mutex_unlock(&sched->start_work_mutex); + + for (i = 0; i < sched->nr_tasks; i++) { + task = sched->tasks[i]; + ret = sem_wait(&task->work_done_sem); + BUG_ON(ret); + sem_init(&task->work_done_sem, 0, 0); + sched->cpu_usage += task->cpu_usage; + task->cpu_usage = 0; + } + + cpu_usage_1 = get_cpu_usage_nsec_parent(); + if (!sched->runavg_cpu_usage) + sched->runavg_cpu_usage = sched->cpu_usage; + sched->runavg_cpu_usage = (sched->runavg_cpu_usage * (sched->replay_repeat - 1) + sched->cpu_usage) / sched->replay_repeat; + + sched->parent_cpu_usage = cpu_usage_1 - cpu_usage_0; + if (!sched->runavg_parent_cpu_usage) + sched->runavg_parent_cpu_usage = sched->parent_cpu_usage; + sched->runavg_parent_cpu_usage = (sched->runavg_parent_cpu_usage * (sched->replay_repeat - 1) + + sched->parent_cpu_usage)/sched->replay_repeat; + + ret = pthread_mutex_lock(&sched->start_work_mutex); + BUG_ON(ret); + + for (i = 0; i < sched->nr_tasks; i++) { + task = sched->tasks[i]; + sem_init(&task->sleep_sem, 0, 0); + task->curr_event = 0; + } +} + +static void run_one_test(struct perf_sched *sched) +{ + u64 T0, T1, delta, avg_delta, fluct; + + T0 = get_nsecs(); + wait_for_tasks(sched); + T1 = get_nsecs(); + + delta = T1 - T0; + sched->sum_runtime += delta; + sched->nr_runs++; + + avg_delta = sched->sum_runtime / sched->nr_runs; + if (delta < avg_delta) + fluct = avg_delta - delta; + else + fluct = delta - avg_delta; + sched->sum_fluct += fluct; + if (!sched->run_avg) + sched->run_avg = delta; + sched->run_avg = (sched->run_avg * (sched->replay_repeat - 1) + delta) / sched->replay_repeat; + + printf("#%-3ld: %0.3f, ", sched->nr_runs, (double)delta / 1000000.0); + + printf("ravg: %0.2f, ", (double)sched->run_avg / 1e6); + + printf("cpu: %0.2f / %0.2f", + (double)sched->cpu_usage / 1e6, (double)sched->runavg_cpu_usage / 1e6); + +#if 0 + /* + * rusage statistics done by the parent, these are less + * accurate than the sched->sum_exec_runtime based statistics: + */ + printf(" [%0.2f / %0.2f]", + (double)sched->parent_cpu_usage/1e6, + (double)sched->runavg_parent_cpu_usage/1e6); +#endif + + printf("\n"); + + if (sched->nr_sleep_corrections) + printf(" (%ld sleep corrections)\n", sched->nr_sleep_corrections); + sched->nr_sleep_corrections = 0; +} + +static void test_calibrations(struct perf_sched *sched) +{ + u64 T0, T1; + + T0 = get_nsecs(); + burn_nsecs(sched, 1e6); + T1 = get_nsecs(); + + printf("the run test took %" PRIu64 " nsecs\n", T1 - T0); + + T0 = get_nsecs(); + sleep_nsecs(1e6); + T1 = get_nsecs(); + + printf("the sleep test took %" PRIu64 " nsecs\n", T1 - T0); +} + +static int +replay_wakeup_event(struct perf_sched *sched, + struct perf_evsel *evsel, struct perf_sample *sample, + struct machine *machine __maybe_unused) +{ + const char *comm = perf_evsel__strval(evsel, sample, "comm"); + const u32 pid = perf_evsel__intval(evsel, sample, "pid"); + struct task_desc *waker, *wakee; + + if (verbose) { + printf("sched_wakeup event %p\n", evsel); + + printf(" ... pid %d woke up %s/%d\n", sample->tid, comm, pid); + } + + waker = register_pid(sched, sample->tid, "<unknown>"); + wakee = register_pid(sched, pid, comm); + + add_sched_event_wakeup(sched, waker, sample->time, wakee); + return 0; +} + +static int replay_switch_event(struct perf_sched *sched, + struct perf_evsel *evsel, + struct perf_sample *sample, + struct machine *machine __maybe_unused) +{ + const char *prev_comm = perf_evsel__strval(evsel, sample, "prev_comm"), + *next_comm = perf_evsel__strval(evsel, sample, "next_comm"); + const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"), + next_pid = perf_evsel__intval(evsel, sample, "next_pid"); + const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state"); + struct task_desc *prev, __maybe_unused *next; + u64 timestamp0, timestamp = sample->time; + int cpu = sample->cpu; + s64 delta; + + if (verbose) + printf("sched_switch event %p\n", evsel); + + if (cpu >= MAX_CPUS || cpu < 0) + return 0; + + timestamp0 = sched->cpu_last_switched[cpu]; + if (timestamp0) + delta = timestamp - timestamp0; + else + delta = 0; + + if (delta < 0) { + pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta); + return -1; + } + + pr_debug(" ... switch from %s/%d to %s/%d [ran %" PRIu64 " nsecs]\n", + prev_comm, prev_pid, next_comm, next_pid, delta); + + prev = register_pid(sched, prev_pid, prev_comm); + next = register_pid(sched, next_pid, next_comm); + + sched->cpu_last_switched[cpu] = timestamp; + + add_sched_event_run(sched, prev, timestamp, delta); + add_sched_event_sleep(sched, prev, timestamp, prev_state); + + return 0; +} + +static int replay_fork_event(struct perf_sched *sched, + union perf_event *event, + struct machine *machine) +{ + struct thread *child, *parent; + + child = machine__findnew_thread(machine, event->fork.pid, + event->fork.tid); + parent = machine__findnew_thread(machine, event->fork.ppid, + event->fork.ptid); + + if (child == NULL || parent == NULL) { + pr_debug("thread does not exist on fork event: child %p, parent %p\n", + child, parent); + return 0; + } + + if (verbose) { + printf("fork event\n"); + printf("... parent: %s/%d\n", thread__comm_str(parent), parent->tid); + printf("... child: %s/%d\n", thread__comm_str(child), child->tid); + } + + register_pid(sched, parent->tid, thread__comm_str(parent)); + register_pid(sched, child->tid, thread__comm_str(child)); + return 0; +} + +struct sort_dimension { + const char *name; + sort_fn_t cmp; + struct list_head list; +}; + +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 int thread_atoms_insert(struct perf_sched *sched, struct thread *thread) +{ + struct work_atoms *atoms = zalloc(sizeof(*atoms)); + if (!atoms) { + pr_err("No memory at %s\n", __func__); + return -1; + } + + atoms->thread = thread__get(thread); + INIT_LIST_HEAD(&atoms->work_list); + __thread_latency_insert(&sched->atom_root, atoms, &sched->cmp_pid); + return 0; +} + +static char sched_out_state(u64 prev_state) +{ + const char *str = TASK_STATE_TO_CHAR_STR; + + return str[prev_state]; +} + +static int +add_sched_out_event(struct work_atoms *atoms, + char run_state, + u64 timestamp) +{ + struct work_atom *atom = zalloc(sizeof(*atom)); + if (!atom) { + pr_err("Non memory at %s", __func__); + return -1; + } + + 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); + return 0; +} + +static void +add_runtime_event(struct work_atoms *atoms, u64 delta, + u64 timestamp __maybe_unused) +{ + 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->max_lat_at = timestamp; + } + atoms->nb_atoms++; +} + +static int latency_switch_event(struct perf_sched *sched, + struct perf_evsel *evsel, + struct perf_sample *sample, + struct machine *machine) +{ + const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"), + next_pid = perf_evsel__intval(evsel, sample, "next_pid"); + const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state"); + struct work_atoms *out_events, *in_events; + struct thread *sched_out, *sched_in; + u64 timestamp0, timestamp = sample->time; + int cpu = sample->cpu; + s64 delta; + + BUG_ON(cpu >= MAX_CPUS || cpu < 0); + + timestamp0 = sched->cpu_last_switched[cpu]; + sched->cpu_last_switched[cpu] = timestamp; + if (timestamp0) + delta = timestamp - timestamp0; + else + delta = 0; + + if (delta < 0) { + pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta); + return -1; + } + + sched_out = machine__findnew_thread(machine, -1, prev_pid); + sched_in = machine__findnew_thread(machine, -1, next_pid); + + out_events = thread_atoms_search(&sched->atom_root, sched_out, &sched->cmp_pid); + if (!out_events) { + if (thread_atoms_insert(sched, sched_out)) + return -1; + out_events = thread_atoms_search(&sched->atom_root, sched_out, &sched->cmp_pid); + if (!out_events) { + pr_err("out-event: Internal tree error"); + return -1; + } + } + if (add_sched_out_event(out_events, sched_out_state(prev_state), timestamp)) + return -1; + + in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid); + if (!in_events) { + if (thread_atoms_insert(sched, sched_in)) + return -1; + in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid); + if (!in_events) { + pr_err("in-event: Internal tree error"); + return -1; + } + /* + * Take came in we have not heard about yet, + * add in an initial atom in runnable state: + */ + if (add_sched_out_event(in_events, 'R', timestamp)) + return -1; + } + add_sched_in_event(in_events, timestamp); + + return 0; +} + +static int latency_runtime_event(struct perf_sched *sched, + struct perf_evsel *evsel, + struct perf_sample *sample, + struct machine *machine) +{ + const u32 pid = perf_evsel__intval(evsel, sample, "pid"); + const u64 runtime = perf_evsel__intval(evsel, sample, "runtime"); + struct thread *thread = machine__findnew_thread(machine, -1, pid); + struct work_atoms *atoms = thread_atoms_search(&sched->atom_root, thread, &sched->cmp_pid); + u64 timestamp = sample->time; + int cpu = sample->cpu; + + BUG_ON(cpu >= MAX_CPUS || cpu < 0); + if (!atoms) { + if (thread_atoms_insert(sched, thread)) + return -1; + atoms = thread_atoms_search(&sched->atom_root, thread, &sched->cmp_pid); + if (!atoms) { + pr_err("in-event: Internal tree error"); + return -1; + } + if (add_sched_out_event(atoms, 'R', timestamp)) + return -1; + } + + add_runtime_event(atoms, runtime, timestamp); + return 0; +} + +static int latency_wakeup_event(struct perf_sched *sched, + struct perf_evsel *evsel, + struct perf_sample *sample, + struct machine *machine) +{ + const u32 pid = perf_evsel__intval(evsel, sample, "pid"); + struct work_atoms *atoms; + struct work_atom *atom; + struct thread *wakee; + u64 timestamp = sample->time; + + wakee = machine__findnew_thread(machine, -1, pid); + atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid); + if (!atoms) { + if (thread_atoms_insert(sched, wakee)) + return -1; + atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid); + if (!atoms) { + pr_err("wakeup-event: Internal tree error"); + return -1; + } + if (add_sched_out_event(atoms, 'S', timestamp)) + return -1; + } + + BUG_ON(list_empty(&atoms->work_list)); + + atom = list_entry(atoms->work_list.prev, struct work_atom, list); + + /* + * As we do not guarantee the wakeup event happens when + * task is out of run queue, also may happen when task is + * on run queue and wakeup only change ->state to TASK_RUNNING, + * then we should not set the ->wake_up_time when wake up a + * task which is on run queue. + * + * You WILL be missing events if you've recorded only + * one CPU, or are only looking at only one, so don't + * skip in this case. + */ + if (sched->profile_cpu == -1 && atom->state != THREAD_SLEEPING) + return 0; + + sched->nr_timestamps++; + if (atom->sched_out_time > timestamp) { + sched->nr_unordered_timestamps++; + return 0; + } + + atom->state = THREAD_WAIT_CPU; + atom->wake_up_time = timestamp; + return 0; +} + +static int latency_migrate_task_event(struct perf_sched *sched, + struct perf_evsel *evsel, + struct perf_sample *sample, + struct machine *machine) +{ + const u32 pid = perf_evsel__intval(evsel, sample, "pid"); + u64 timestamp = sample->time; + struct work_atoms *atoms; + struct work_atom *atom; + struct thread *migrant; + + /* + * Only need to worry about migration when profiling one CPU. + */ + if (sched->profile_cpu == -1) + return 0; + + migrant = machine__findnew_thread(machine, -1, pid); + atoms = thread_atoms_search(&sched->atom_root, migrant, &sched->cmp_pid); + if (!atoms) { + if (thread_atoms_insert(sched, migrant)) + return -1; + register_pid(sched, migrant->tid, thread__comm_str(migrant)); + atoms = thread_atoms_search(&sched->atom_root, migrant, &sched->cmp_pid); + if (!atoms) { + pr_err("migration-event: Internal tree error"); + return -1; + } + if (add_sched_out_event(atoms, 'R', timestamp)) + return -1; + } + + BUG_ON(list_empty(&atoms->work_list)); + + atom = list_entry(atoms->work_list.prev, struct work_atom, list); + atom->sched_in_time = atom->sched_out_time = atom->wake_up_time = timestamp; + + sched->nr_timestamps++; + + if (atom->sched_out_time > timestamp) + sched->nr_unordered_timestamps++; + + return 0; +} + +static void output_lat_thread(struct perf_sched *sched, struct work_atoms *work_list) +{ + int i; + int ret; + u64 avg; + + if (!work_list->nb_atoms) + return; + /* + * Ignore idle threads: + */ + if (!strcmp(thread__comm_str(work_list->thread), "swapper")) + return; + + sched->all_runtime += work_list->total_runtime; + sched->all_count += work_list->nb_atoms; + + ret = printf(" %s:%d ", thread__comm_str(work_list->thread), work_list->thread->tid); + + for (i = 0; i < 24 - ret; i++) + printf(" "); + + avg = work_list->total_lat / work_list->nb_atoms; + + printf("|%11.3f ms |%9" PRIu64 " | avg:%9.3f ms | max:%9.3f ms | max at: %13.6f s\n", + (double)work_list->total_runtime / 1e6, + work_list->nb_atoms, (double)avg / 1e6, + (double)work_list->max_lat / 1e6, + (double)work_list->max_lat_at / 1e9); +} + +static int pid_cmp(struct work_atoms *l, struct work_atoms *r) +{ + if (l->thread->tid < r->thread->tid) + return -1; + if (l->thread->tid > r->thread->tid) + return 1; + + return 0; +} + +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 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 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 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 int sort_dimension__add(const char *tok, struct list_head *list) +{ + size_t i; + static struct sort_dimension avg_sort_dimension = { + .name = "avg", + .cmp = avg_cmp, + }; + static struct sort_dimension max_sort_dimension = { + .name = "max", + .cmp = max_cmp, + }; + static struct sort_dimension pid_sort_dimension = { + .name = "pid", + .cmp = pid_cmp, + }; + static struct sort_dimension runtime_sort_dimension = { + .name = "runtime", + .cmp = runtime_cmp, + }; + static struct sort_dimension switch_sort_dimension = { + .name = "switch", + .cmp = switch_cmp, + }; + struct sort_dimension *available_sorts[] = { + &pid_sort_dimension, + &avg_sort_dimension, + &max_sort_dimension, + &switch_sort_dimension, + &runtime_sort_dimension, + }; + + for (i = 0; i < ARRAY_SIZE(available_sorts); i++) { + if (!strcmp(available_sorts[i]->name, tok)) { + list_add_tail(&available_sorts[i]->list, list); + + return 0; + } + } + + return -1; +} + +static void perf_sched__sort_lat(struct perf_sched *sched) +{ + struct rb_node *node; + + for (;;) { + struct work_atoms *data; + node = rb_first(&sched->atom_root); + if (!node) + break; + + rb_erase(node, &sched->atom_root); + data = rb_entry(node, struct work_atoms, node); + __thread_latency_insert(&sched->sorted_atom_root, data, &sched->sort_list); + } +} + +static int process_sched_wakeup_event(struct perf_tool *tool, + struct perf_evsel *evsel, + struct perf_sample *sample, + struct machine *machine) +{ + struct perf_sched *sched = container_of(tool, struct perf_sched, tool); + + if (sched->tp_handler->wakeup_event) + return sched->tp_handler->wakeup_event(sched, evsel, sample, machine); + + return 0; +} + +static int map_switch_event(struct perf_sched *sched, struct perf_evsel *evsel, + struct perf_sample *sample, struct machine *machine) +{ + const u32 next_pid = perf_evsel__intval(evsel, sample, "next_pid"); + struct thread *sched_in; + int new_shortname; + u64 timestamp0, timestamp = sample->time; + s64 delta; + int cpu, this_cpu = sample->cpu; + + BUG_ON(this_cpu >= MAX_CPUS || this_cpu < 0); + + if (this_cpu > sched->max_cpu) + sched->max_cpu = this_cpu; + + timestamp0 = sched->cpu_last_switched[this_cpu]; + sched->cpu_last_switched[this_cpu] = timestamp; + if (timestamp0) + delta = timestamp - timestamp0; + else + delta = 0; + + if (delta < 0) { + pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta); + return -1; + } + + sched_in = machine__findnew_thread(machine, -1, next_pid); + + sched->curr_thread[this_cpu] = sched_in; + + printf(" "); + + new_shortname = 0; + if (!sched_in->shortname[0]) { + if (!strcmp(thread__comm_str(sched_in), "swapper")) { + /* + * Don't allocate a letter-number for swapper:0 + * as a shortname. Instead, we use '.' for it. + */ + sched_in->shortname[0] = '.'; + sched_in->shortname[1] = ' '; + } else { + sched_in->shortname[0] = sched->next_shortname1; + sched_in->shortname[1] = sched->next_shortname2; + + if (sched->next_shortname1 < 'Z') { + sched->next_shortname1++; + } else { + sched->next_shortname1 = 'A'; + if (sched->next_shortname2 < '9') + sched->next_shortname2++; + else + sched->next_shortname2 = '0'; + } + } + new_shortname = 1; + } + + for (cpu = 0; cpu <= sched->max_cpu; cpu++) { + if (cpu != this_cpu) + printf(" "); + else + printf("*"); + + if (sched->curr_thread[cpu]) + printf("%2s ", sched->curr_thread[cpu]->shortname); + else + printf(" "); + } + + printf(" %12.6f secs ", (double)timestamp/1e9); + if (new_shortname) { + printf("%s => %s:%d\n", + sched_in->shortname, thread__comm_str(sched_in), sched_in->tid); + } else { + printf("\n"); + } + + return 0; +} + +static int process_sched_switch_event(struct perf_tool *tool, + struct perf_evsel *evsel, + struct perf_sample *sample, + struct machine *machine) +{ + struct perf_sched *sched = container_of(tool, struct perf_sched, tool); + int this_cpu = sample->cpu, err = 0; + u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"), + next_pid = perf_evsel__intval(evsel, sample, "next_pid"); + + if (sched->curr_pid[this_cpu] != (u32)-1) { + /* + * Are we trying to switch away a PID that is + * not current? + */ + if (sched->curr_pid[this_cpu] != prev_pid) + sched->nr_context_switch_bugs++; + } + + if (sched->tp_handler->switch_event) + err = sched->tp_handler->switch_event(sched, evsel, sample, machine); + + sched->curr_pid[this_cpu] = next_pid; + return err; +} + +static int process_sched_runtime_event(struct perf_tool *tool, + struct perf_evsel *evsel, + struct perf_sample *sample, + struct machine *machine) +{ + struct perf_sched *sched = container_of(tool, struct perf_sched, tool); + + if (sched->tp_handler->runtime_event) + return sched->tp_handler->runtime_event(sched, evsel, sample, machine); + + return 0; +} + +static int perf_sched__process_fork_event(struct perf_tool *tool, + union perf_event *event, + struct perf_sample *sample, + struct machine *machine) +{ + struct perf_sched *sched = container_of(tool, struct perf_sched, tool); + + /* run the fork event through the perf machineruy */ + perf_event__process_fork(tool, event, sample, machine); + + /* and then run additional processing needed for this command */ + if (sched->tp_handler->fork_event) + return sched->tp_handler->fork_event(sched, event, machine); + + return 0; +} + +static int process_sched_migrate_task_event(struct perf_tool *tool, + struct perf_evsel *evsel, + struct perf_sample *sample, + struct machine *machine) +{ + struct perf_sched *sched = container_of(tool, struct perf_sched, tool); + + if (sched->tp_handler->migrate_task_event) + return sched->tp_handler->migrate_task_event(sched, evsel, sample, machine); + + return 0; +} + +typedef int (*tracepoint_handler)(struct perf_tool *tool, + struct perf_evsel *evsel, + struct perf_sample *sample, + struct machine *machine); + +static int perf_sched__process_tracepoint_sample(struct perf_tool *tool __maybe_unused, + union perf_event *event __maybe_unused, + struct perf_sample *sample, + struct perf_evsel *evsel, + struct machine *machine) +{ + int err = 0; + + if (evsel->handler != NULL) { + tracepoint_handler f = evsel->handler; + err = f(tool, evsel, sample, machine); + } + + return err; +} + +static int perf_sched__read_events(struct perf_sched *sched) +{ + const struct perf_evsel_str_handler handlers[] = { + { "sched:sched_switch", process_sched_switch_event, }, + { "sched:sched_stat_runtime", process_sched_runtime_event, }, + { "sched:sched_wakeup", process_sched_wakeup_event, }, + { "sched:sched_wakeup_new", process_sched_wakeup_event, }, + { "sched:sched_migrate_task", process_sched_migrate_task_event, }, + }; + struct perf_session *session; + struct perf_data_file file = { + .path = input_name, + .mode = PERF_DATA_MODE_READ, + .force = sched->force, + }; + int rc = -1; + + session = perf_session__new(&file, false, &sched->tool); + if (session == NULL) { + pr_debug("No Memory for session\n"); + return -1; + } + + symbol__init(&session->header.env); + + if (perf_session__set_tracepoints_handlers(session, handlers)) + goto out_delete; + + if (perf_session__has_traces(session, "record -R")) { + int err = perf_session__process_events(session); + if (err) { + pr_err("Failed to process events, error %d", err); + goto out_delete; + } + + sched->nr_events = session->evlist->stats.nr_events[0]; + sched->nr_lost_events = session->evlist->stats.total_lost; + sched->nr_lost_chunks = session->evlist->stats.nr_events[PERF_RECORD_LOST]; + } + + rc = 0; +out_delete: + perf_session__delete(session); + return rc; +} + +static void print_bad_events(struct perf_sched *sched) +{ + if (sched->nr_unordered_timestamps && sched->nr_timestamps) { + printf(" INFO: %.3f%% unordered timestamps (%ld out of %ld)\n", + (double)sched->nr_unordered_timestamps/(double)sched->nr_timestamps*100.0, + sched->nr_unordered_timestamps, sched->nr_timestamps); + } + if (sched->nr_lost_events && sched->nr_events) { + printf(" INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n", + (double)sched->nr_lost_events/(double)sched->nr_events * 100.0, + sched->nr_lost_events, sched->nr_events, sched->nr_lost_chunks); + } + if (sched->nr_context_switch_bugs && sched->nr_timestamps) { + printf(" INFO: %.3f%% context switch bugs (%ld out of %ld)", + (double)sched->nr_context_switch_bugs/(double)sched->nr_timestamps*100.0, + sched->nr_context_switch_bugs, sched->nr_timestamps); + if (sched->nr_lost_events) + printf(" (due to lost events?)"); + printf("\n"); + } +} + +static int perf_sched__lat(struct perf_sched *sched) +{ + struct rb_node *next; + + setup_pager(); + + if (perf_sched__read_events(sched)) + return -1; + + perf_sched__sort_lat(sched); + + printf("\n -----------------------------------------------------------------------------------------------------------------\n"); + printf(" Task | Runtime ms | Switches | Average delay ms | Maximum delay ms | Maximum delay at |\n"); + printf(" -----------------------------------------------------------------------------------------------------------------\n"); + + next = rb_first(&sched->sorted_atom_root); + + while (next) { + struct work_atoms *work_list; + + work_list = rb_entry(next, struct work_atoms, node); + output_lat_thread(sched, work_list); + next = rb_next(next); + thread__zput(work_list->thread); + } + + printf(" -----------------------------------------------------------------------------------------------------------------\n"); + printf(" TOTAL: |%11.3f ms |%9" PRIu64 " |\n", + (double)sched->all_runtime / 1e6, sched->all_count); + + printf(" ---------------------------------------------------\n"); + + print_bad_events(sched); + printf("\n"); + + return 0; +} + +static int perf_sched__map(struct perf_sched *sched) +{ + sched->max_cpu = sysconf(_SC_NPROCESSORS_CONF); + + setup_pager(); + if (perf_sched__read_events(sched)) + return -1; + print_bad_events(sched); + return 0; +} + +static int perf_sched__replay(struct perf_sched *sched) +{ + unsigned long i; + + calibrate_run_measurement_overhead(sched); + calibrate_sleep_measurement_overhead(sched); + + test_calibrations(sched); + + if (perf_sched__read_events(sched)) + return -1; + + printf("nr_run_events: %ld\n", sched->nr_run_events); + printf("nr_sleep_events: %ld\n", sched->nr_sleep_events); + printf("nr_wakeup_events: %ld\n", sched->nr_wakeup_events); + + if (sched->targetless_wakeups) + printf("target-less wakeups: %ld\n", sched->targetless_wakeups); + if (sched->multitarget_wakeups) + printf("multi-target wakeups: %ld\n", sched->multitarget_wakeups); + if (sched->nr_run_events_optimized) + printf("run atoms optimized: %ld\n", + sched->nr_run_events_optimized); + + print_task_traces(sched); + add_cross_task_wakeups(sched); + + create_tasks(sched); + printf("------------------------------------------------------------\n"); + for (i = 0; i < sched->replay_repeat; i++) + run_one_test(sched); + + return 0; +} + +static void setup_sorting(struct perf_sched *sched, const struct option *options, + const char * const usage_msg[]) +{ + char *tmp, *tok, *str = strdup(sched->sort_order); + + for (tok = strtok_r(str, ", ", &tmp); + tok; tok = strtok_r(NULL, ", ", &tmp)) { + if (sort_dimension__add(tok, &sched->sort_list) < 0) { + error("Unknown --sort key: `%s'", tok); + usage_with_options(usage_msg, options); + } + } + + free(str); + + sort_dimension__add("pid", &sched->cmp_pid); +} + +static int __cmd_record(int argc, const char **argv) +{ + unsigned int rec_argc, i, j; + const char **rec_argv; + const char * const record_args[] = { + "record", + "-a", + "-R", + "-m", "1024", + "-c", "1", + "-e", "sched:sched_switch", + "-e", "sched:sched_stat_wait", + "-e", "sched:sched_stat_sleep", + "-e", "sched:sched_stat_iowait", + "-e", "sched:sched_stat_runtime", + "-e", "sched:sched_process_fork", + "-e", "sched:sched_wakeup", + "-e", "sched:sched_wakeup_new", + "-e", "sched:sched_migrate_task", + }; + + rec_argc = ARRAY_SIZE(record_args) + argc - 1; + rec_argv = calloc(rec_argc + 1, sizeof(char *)); + + if (rec_argv == NULL) + return -ENOMEM; + + 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 __maybe_unused) +{ + const char default_sort_order[] = "avg, max, switch, runtime"; + struct perf_sched sched = { + .tool = { + .sample = perf_sched__process_tracepoint_sample, + .comm = perf_event__process_comm, + .lost = perf_event__process_lost, + .fork = perf_sched__process_fork_event, + .ordered_events = true, + }, + .cmp_pid = LIST_HEAD_INIT(sched.cmp_pid), + .sort_list = LIST_HEAD_INIT(sched.sort_list), + .start_work_mutex = PTHREAD_MUTEX_INITIALIZER, + .work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER, + .sort_order = default_sort_order, + .replay_repeat = 10, + .profile_cpu = -1, + .next_shortname1 = 'A', + .next_shortname2 = '0', + }; + const struct option latency_options[] = { + OPT_STRING('s', "sort", &sched.sort_order, "key[,key2...]", + "sort by key(s): runtime, switch, avg, max"), + OPT_INCR('v', "verbose", &verbose, + "be more verbose (show symbol address, etc)"), + OPT_INTEGER('C', "CPU", &sched.profile_cpu, + "CPU to profile on"), + OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, + "dump raw trace in ASCII"), + OPT_END() + }; + const struct option replay_options[] = { + OPT_UINTEGER('r', "repeat", &sched.replay_repeat, + "repeat the workload replay N times (-1: infinite)"), + OPT_INCR('v', "verbose", &verbose, + "be more verbose (show symbol address, etc)"), + OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, + "dump raw trace in ASCII"), + OPT_BOOLEAN('f', "force", &sched.force, "don't complain, do it"), + OPT_END() + }; + const struct option sched_options[] = { + OPT_STRING('i', "input", &input_name, "file", + "input file name"), + OPT_INCR('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() + }; + const char * const latency_usage[] = { + "perf sched latency [<options>]", + NULL + }; + const char * const replay_usage[] = { + "perf sched replay [<options>]", + NULL + }; + const char *const sched_subcommands[] = { "record", "latency", "map", + "replay", "script", NULL }; + const char *sched_usage[] = { + NULL, + NULL + }; + struct trace_sched_handler lat_ops = { + .wakeup_event = latency_wakeup_event, + .switch_event = latency_switch_event, + .runtime_event = latency_runtime_event, + .migrate_task_event = latency_migrate_task_event, + }; + struct trace_sched_handler map_ops = { + .switch_event = map_switch_event, + }; + struct trace_sched_handler replay_ops = { + .wakeup_event = replay_wakeup_event, + .switch_event = replay_switch_event, + .fork_event = replay_fork_event, + }; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(sched.curr_pid); i++) + sched.curr_pid[i] = -1; + + argc = parse_options_subcommand(argc, argv, sched_options, sched_subcommands, + sched_usage, PARSE_OPT_STOP_AT_NON_OPTION); + if (!argc) + usage_with_options(sched_usage, sched_options); + + /* + * Aliased to 'perf script' for now: + */ + if (!strcmp(argv[0], "script")) + return cmd_script(argc, argv, prefix); + + if (!strncmp(argv[0], "rec", 3)) { + return __cmd_record(argc, argv); + } else if (!strncmp(argv[0], "lat", 3)) { + sched.tp_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(&sched, latency_options, latency_usage); + return perf_sched__lat(&sched); + } else if (!strcmp(argv[0], "map")) { + sched.tp_handler = &map_ops; + setup_sorting(&sched, latency_options, latency_usage); + return perf_sched__map(&sched); + } else if (!strncmp(argv[0], "rep", 3)) { + sched.tp_handler = &replay_ops; + if (argc) { + argc = parse_options(argc, argv, replay_options, replay_usage, 0); + if (argc) + usage_with_options(replay_usage, replay_options); + } + return perf_sched__replay(&sched); + } else { + usage_with_options(sched_usage, sched_options); + } + + return 0; +} |