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-rw-r--r--src/tools/perf/builtin-sched.c1773
1 files changed, 0 insertions, 1773 deletions
diff --git a/src/tools/perf/builtin-sched.c b/src/tools/perf/builtin-sched.c
deleted file mode 100644
index d8c51b2..0000000
--- a/src/tools/perf/builtin-sched.c
+++ /dev/null
@@ -1,1773 +0,0 @@
-#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/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>
-
-#define PR_SET_NAME 15 /* Set process name */
-#define MAX_CPUS 4096
-#define COMM_LEN 20
-#define SYM_LEN 129
-#define MAX_PID 65536
-
-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 "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 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[MAX_PID];
- 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_state_machine_bugs;
- 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;
-};
-
-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;
-
- BUG_ON(pid >= MAX_PID);
-
- 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_task *));
- 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(void)
-{
- struct perf_event_attr attr;
- int fd;
-
- memset(&attr, 0, sizeof(attr));
-
- attr.type = PERF_TYPE_SOFTWARE;
- attr.config = PERF_COUNT_SW_TASK_CLOCK;
-
- fd = sys_perf_event_open(&attr, 0, -1, -1, 0);
-
- if (fd < 0)
- pr_err("Error: sys_perf_event_open() syscall returned "
- "with %d (%s)\n", fd, strerror(errno));
- 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;
-};
-
-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;
-
- free(parms);
-
- sprintf(comm2, ":%s", this_task->comm);
- prctl(PR_SET_NAME, comm2);
- fd = self_open_counters();
- 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;
- 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 * 9 + sched->cpu_usage) / 10;
-
- 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 * 9 +
- sched->parent_cpu_usage)/10;
-
- 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 * 9 + delta) / 10;
-
- 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", parent->comm, parent->tid);
- printf("... child: %s/%d\n", child->comm, child->tid);
- }
-
- register_pid(sched, parent->tid, parent->comm);
- register_pid(sched, child->tid, child->comm);
- 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;
- 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, 0, prev_pid);
- sched_in = machine__findnew_thread(machine, 0, 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, 0, 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"),
- success = perf_evsel__intval(evsel, sample, "success");
- struct work_atoms *atoms;
- struct work_atom *atom;
- struct thread *wakee;
- u64 timestamp = sample->time;
-
- /* Note for later, it may be interesting to observe the failing cases */
- if (!success)
- return 0;
-
- wakee = machine__findnew_thread(machine, 0, 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);
-
- /*
- * You WILL be missing events if you've recorded only
- * one CPU, or are only looking at only one, so don't
- * make useless noise.
- */
- if (sched->profile_cpu == -1 && atom->state != THREAD_SLEEPING)
- sched->nr_state_machine_bugs++;
-
- 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, 0, 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, migrant->comm);
- 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(work_list->thread->comm, "swapper"))
- return;
-
- sched->all_runtime += work_list->total_runtime;
- sched->all_count += work_list->nb_atoms;
-
- ret = printf(" %s:%d ", work_list->thread->comm, 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: %9.6f 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 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
- next_pid = perf_evsel__intval(evsel, sample, "next_pid");
- struct thread *sched_out __maybe_unused, *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_out = machine__findnew_thread(machine, 0, prev_pid);
- sched_in = machine__findnew_thread(machine, 0, next_pid);
-
- sched->curr_thread[this_cpu] = sched_in;
-
- printf(" ");
-
- new_shortname = 0;
- if (!sched_in->shortname[0]) {
- 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]) {
- if (sched->curr_thread[cpu]->tid)
- printf("%2s ", sched->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->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;
-
- evsel->hists.stats.total_period += sample->period;
- hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
-
- if (evsel->handler.func != NULL) {
- tracepoint_handler f = evsel->handler.func;
- err = f(tool, evsel, sample, machine);
- }
-
- return err;
-}
-
-static int perf_sched__read_events(struct perf_sched *sched,
- struct perf_session **psession)
-{
- 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;
-
- session = perf_session__new(input_name, O_RDONLY, 0, false, &sched->tool);
- if (session == NULL) {
- pr_debug("No Memory for session\n");
- return -1;
- }
-
- 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, &sched->tool);
- if (err) {
- pr_err("Failed to process events, error %d", err);
- goto out_delete;
- }
-
- sched->nr_events = session->stats.nr_events[0];
- sched->nr_lost_events = session->stats.total_lost;
- sched->nr_lost_chunks = session->stats.nr_events[PERF_RECORD_LOST];
- }
-
- if (psession)
- *psession = session;
- else
- perf_session__delete(session);
-
- return 0;
-
-out_delete:
- perf_session__delete(session);
- return -1;
-}
-
-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_state_machine_bugs && sched->nr_timestamps) {
- printf(" INFO: %.3f%% state machine bugs (%ld out of %ld)",
- (double)sched->nr_state_machine_bugs/(double)sched->nr_timestamps*100.0,
- sched->nr_state_machine_bugs, sched->nr_timestamps);
- if (sched->nr_lost_events)
- printf(" (due to lost events?)");
- printf("\n");
- }
- 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;
- struct perf_session *session;
-
- setup_pager();
-
- /* save session -- references to threads are held in work_list */
- if (perf_sched__read_events(sched, &session))
- 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);
- }
-
- 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");
-
- perf_session__delete(session);
- 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, NULL))
- 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, NULL))
- 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_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);
-}
-
-static const char default_sort_order[] = "avg, max, switch, runtime";
-static 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_samples = 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,
- .curr_pid = { [0 ... MAX_CPUS - 1] = -1 },
- .sort_order = default_sort_order,
- .replay_repeat = 10,
- .profile_cpu = -1,
- .next_shortname1 = 'A',
- .next_shortname2 = '0',
-};
-
-int cmd_sched(int argc, const char **argv, const char *prefix __maybe_unused)
-{
- 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_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_usage[] = {
- "perf sched [<options>] {record|latency|map|replay|script}",
- 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,
- };
-
- argc = parse_options(argc, argv, sched_options, 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);
-
- symbol__init();
- 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;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-31 23:29:33 +0000