linux/tools/perf/builtin-sched.c
Feng Tang 70cb4e963f perf tools: Add a global variable "const char *input_name"
Currently many perf commands annotate/evlist/report/script/lock etc all
support "-i" option to chose a specific perf data, and all of them
create a local "input_name" to save the file name for that perf data.

Since most of these commands need it, we can add a global variable for
it, also it can some other benefits:

1. When calling script browser inside hists/annotation browser, it needs
to know the perf data file name to run that script.

2. For further feature like runtime switching to another perf data file,
this variable can also help.

Signed-off-by: Feng Tang <feng.tang@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1351569369-26732-2-git-send-email-feng.tang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2012-10-29 11:45:34 -02:00

1787 lines
44 KiB
C

#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);
int (*fork_event)(struct perf_sched *sched, struct perf_evsel *evsel,
struct perf_sample *sample);
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, struct perf_evsel *evsel,
struct perf_sample *sample)
{
const char *parent_comm = perf_evsel__strval(evsel, sample, "parent_comm"),
*child_comm = perf_evsel__strval(evsel, sample, "child_comm");
const u32 parent_pid = perf_evsel__intval(evsel, sample, "parent_pid"),
child_pid = perf_evsel__intval(evsel, sample, "child_pid");
if (verbose) {
printf("sched_fork event %p\n", evsel);
printf("... parent: %s/%d\n", parent_comm, parent_pid);
printf("... child: %s/%d\n", child_comm, child_pid);
}
register_pid(sched, parent_pid, parent_comm);
register_pid(sched, child_pid, 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 int latency_fork_event(struct perf_sched *sched __maybe_unused,
struct perf_evsel *evsel __maybe_unused,
struct perf_sample *sample __maybe_unused)
{
/* should insert the newcomer */
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, prev_pid);
sched_in = machine__findnew_thread(machine, 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, 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, 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, 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->pid, 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->pid);
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->pid < r->thread->pid)
return -1;
if (l->thread->pid > r->thread->pid)
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, prev_pid);
sched_in = machine__findnew_thread(machine, 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]->pid)
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->pid);
} 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 process_sched_fork_event(struct perf_tool *tool,
struct perf_evsel *evsel,
struct perf_sample *sample,
struct machine *machine __maybe_unused)
{
struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
if (sched->tp_handler->fork_event)
return sched->tp_handler->fork_event(sched, evsel, sample);
return 0;
}
static int process_sched_exit_event(struct perf_tool *tool __maybe_unused,
struct perf_evsel *evsel,
struct perf_sample *sample __maybe_unused,
struct machine *machine __maybe_unused)
{
pr_debug("sched_exit event %p\n", evsel);
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)
{
struct thread *thread = machine__findnew_thread(machine, sample->tid);
int err = 0;
if (thread == NULL) {
pr_debug("problem processing %s event, skipping it.\n",
perf_evsel__name(evsel));
return -1;
}
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, bool destroy,
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_process_fork", process_sched_fork_event, },
{ "sched:sched_process_exit", process_sched_exit_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->hists.stats.nr_events[0];
sched->nr_lost_events = session->hists.stats.total_lost;
sched->nr_lost_chunks = session->hists.stats.nr_events[PERF_RECORD_LOST];
}
if (destroy)
perf_session__delete(session);
if (psession)
*psession = 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();
if (perf_sched__read_events(sched, false, &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, true, 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, true, 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",
"-f",
"-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_exit",
"-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);
}
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,
.exit = perf_event__process_exit,
.fork = perf_event__process_fork,
.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',
};
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,
.fork_event = latency_fork_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;
}