#include "builtin.h"
+#include "perf.h"
#include "util/util.h"
#include "util/cache.h"
#include "util/header.h"
#include "util/parse-options.h"
+#include "util/trace-event.h"
-#include "perf.h"
#include "util/debug.h"
+#include "util/data_map.h"
-#include "util/trace-event.h"
#include <sys/types.h>
+#include <sys/prctl.h>
-static char const *input_name = "perf.data";
-static int input;
-static unsigned long page_size;
-static unsigned long mmap_window = 32;
-
-static unsigned long total_comm = 0;
+#include <semaphore.h>
+#include <pthread.h>
+#include <math.h>
-static struct rb_root threads;
-static struct thread *last_match;
+static char const *input_name = "perf.data";
static struct perf_header *header;
static u64 sample_type;
+static char default_sort_order[] = "avg, max, switch, runtime";
+static char *sort_order = default_sort_order;
-/*
- * Scheduler benchmarks
- */
-#include <sys/resource.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/time.h>
-#include <sys/prctl.h>
+static int profile_cpu = -1;
-#include <linux/unistd.h>
+#define PR_SET_NAME 15 /* Set process name */
+#define MAX_CPUS 4096
-#include <semaphore.h>
-#include <pthread.h>
-#include <signal.h>
-#include <values.h>
-#include <string.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <assert.h>
-#include <fcntl.h>
-#include <time.h>
-#include <math.h>
+static u64 run_measurement_overhead;
+static u64 sleep_measurement_overhead;
-#include <stdio.h>
+#define COMM_LEN 20
+#define SYM_LEN 129
-#define PR_SET_NAME 15 /* Set process name */
+#define MAX_PID 65536
-#define BUG_ON(x) assert(!(x))
+static unsigned long nr_tasks;
-#define DEBUG 0
+struct sched_atom;
+
+struct task_desc {
+ unsigned long nr;
+ unsigned long pid;
+ char comm[COMM_LEN];
-typedef unsigned long long nsec_t;
+ unsigned long nr_events;
+ unsigned long curr_event;
+ struct sched_atom **atoms;
-#define printk(x...) do { printf(x); fflush(stdout); } while (0)
+ pthread_t thread;
+ sem_t sleep_sem;
-nsec_t prev_printk;
+ sem_t ready_for_work;
+ sem_t work_done_sem;
-#define __dprintk(x,y...) do { \
- nsec_t __now = get_nsecs(), __delta = __now - prev_printk; \
- \
- prev_printk = __now; \
- \
- printf("%.3f [%Ld] [%.3f]: " x, (double)__now/1e6, __now, (double)__delta/1e6, y);\
-} while (0)
+ u64 cpu_usage;
+};
-#if !DEBUG
-# define dprintk(x...) do { } while (0)
-#else
-# define dprintk(x...) __dprintk(x)
-#endif
+enum sched_event_type {
+ SCHED_EVENT_RUN,
+ SCHED_EVENT_SLEEP,
+ SCHED_EVENT_WAKEUP,
+ SCHED_EVENT_MIGRATION,
+};
+
+struct sched_atom {
+ enum sched_event_type type;
+ u64 timestamp;
+ u64 duration;
+ unsigned long nr;
+ int specific_wait;
+ sem_t *wait_sem;
+ struct task_desc *wakee;
+};
+
+static struct task_desc *pid_to_task[MAX_PID];
+
+static struct task_desc **tasks;
+
+static pthread_mutex_t start_work_mutex = PTHREAD_MUTEX_INITIALIZER;
+static u64 start_time;
+
+static pthread_mutex_t work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER;
+
+static unsigned long nr_run_events;
+static unsigned long nr_sleep_events;
+static unsigned long nr_wakeup_events;
+
+static unsigned long nr_sleep_corrections;
+static unsigned long nr_run_events_optimized;
+
+static unsigned long targetless_wakeups;
+static unsigned long multitarget_wakeups;
+
+static u64 cpu_usage;
+static u64 runavg_cpu_usage;
+static u64 parent_cpu_usage;
+static u64 runavg_parent_cpu_usage;
+
+static unsigned long nr_runs;
+static u64 sum_runtime;
+static u64 sum_fluct;
+static u64 run_avg;
+
+static unsigned long replay_repeat = 10;
+static unsigned long nr_timestamps;
+static unsigned long nr_unordered_timestamps;
+static unsigned long nr_state_machine_bugs;
+static unsigned long nr_context_switch_bugs;
+static unsigned long nr_events;
+static unsigned long nr_lost_chunks;
+static unsigned long nr_lost_events;
+
+#define TASK_STATE_TO_CHAR_STR "RSDTtZX"
+
+enum thread_state {
+ THREAD_SLEEPING = 0,
+ THREAD_WAIT_CPU,
+ THREAD_SCHED_IN,
+ THREAD_IGNORE
+};
+
+struct work_atom {
+ struct list_head list;
+ enum thread_state state;
+ u64 sched_out_time;
+ u64 wake_up_time;
+ u64 sched_in_time;
+ u64 runtime;
+};
+
+struct work_atoms {
+ struct list_head work_list;
+ struct thread *thread;
+ struct rb_node node;
+ u64 max_lat;
+ u64 total_lat;
+ u64 nb_atoms;
+ u64 total_runtime;
+};
+
+typedef int (*sort_fn_t)(struct work_atoms *, struct work_atoms *);
-#define __DP() __dprintk("parent: line %d\n", __LINE__)
-#define DP() dprintk("parent: line %d\n", __LINE__)
-#define D() dprintk("task %ld: line %d\n", this_task->nr, __LINE__)
+static struct rb_root atom_root, sorted_atom_root;
+static u64 all_runtime;
+static u64 all_count;
-static nsec_t run_measurement_overhead;
-static nsec_t sleep_measurement_overhead;
-static nsec_t get_nsecs(void)
+static u64 get_nsecs(void)
{
struct timespec ts;
return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
}
-static void burn_nsecs(nsec_t nsecs)
+static void burn_nsecs(u64 nsecs)
{
- nsec_t T0 = get_nsecs(), T1;
+ u64 T0 = get_nsecs(), T1;
do {
T1 = get_nsecs();
} while (T1 + run_measurement_overhead < T0 + nsecs);
}
-static void sleep_nsecs(nsec_t nsecs)
+static void sleep_nsecs(u64 nsecs)
{
struct timespec ts;
static void calibrate_run_measurement_overhead(void)
{
- nsec_t T0, T1, delta, min_delta = 1000000000ULL;
+ u64 T0, T1, delta, min_delta = 1000000000ULL;
int i;
for (i = 0; i < 10; i++) {
}
run_measurement_overhead = min_delta;
- printk("run measurement overhead: %Ld nsecs\n", min_delta);
+ printf("run measurement overhead: %Ld nsecs\n", min_delta);
}
static void calibrate_sleep_measurement_overhead(void)
{
- nsec_t T0, T1, delta, min_delta = 1000000000ULL;
+ u64 T0, T1, delta, min_delta = 1000000000ULL;
int i;
for (i = 0; i < 10; i++) {
min_delta -= 10000;
sleep_measurement_overhead = min_delta;
- printk("sleep measurement overhead: %Ld nsecs\n", min_delta);
+ printf("sleep measurement overhead: %Ld nsecs\n", min_delta);
}
-#define COMM_LEN 20
-#define SYM_LEN 129
-
-#define MAX_PID 65536
-
-static unsigned long nr_tasks;
-
-struct sched_event;
-
-struct task_desc {
- unsigned long nr;
- unsigned long pid;
- char comm[COMM_LEN];
-
- unsigned long nr_events;
- unsigned long curr_event;
- struct sched_event **events;
-
- pthread_t thread;
- sem_t sleep_sem;
-
- sem_t ready_for_work;
- sem_t work_done_sem;
-
- nsec_t cpu_usage;
-};
-
-enum sched_event_type {
- SCHED_EVENT_RUN,
- SCHED_EVENT_SLEEP,
- SCHED_EVENT_WAKEUP,
-};
-
-struct sched_event {
- enum sched_event_type type;
- nsec_t timestamp;
- nsec_t duration;
- unsigned long nr;
- int specific_wait;
- sem_t *wait_sem;
- struct task_desc *wakee;
-};
-
-static struct task_desc *pid_to_task[MAX_PID];
-
-static struct task_desc **tasks;
-
-static pthread_mutex_t start_work_mutex = PTHREAD_MUTEX_INITIALIZER;
-static nsec_t start_time;
-
-static pthread_mutex_t work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER;
-
-static unsigned long nr_run_events;
-static unsigned long nr_sleep_events;
-static unsigned long nr_wakeup_events;
-
-static unsigned long nr_sleep_corrections;
-static unsigned long nr_run_events_optimized;
-
-static struct sched_event *
-get_new_event(struct task_desc *task, nsec_t timestamp)
+static struct sched_atom *
+get_new_event(struct task_desc *task, u64 timestamp)
{
- struct sched_event *event = calloc(1, sizeof(*event));
+ struct sched_atom *event = zalloc(sizeof(*event));
unsigned long idx = task->nr_events;
size_t size;
event->nr = idx;
task->nr_events++;
- size = sizeof(struct sched_event *) * task->nr_events;
- task->events = realloc(task->events, size);
- BUG_ON(!task->events);
+ size = sizeof(struct sched_atom *) * task->nr_events;
+ task->atoms = realloc(task->atoms, size);
+ BUG_ON(!task->atoms);
- task->events[idx] = event;
+ task->atoms[idx] = event;
return event;
}
-static struct sched_event *last_event(struct task_desc *task)
+static struct sched_atom *last_event(struct task_desc *task)
{
if (!task->nr_events)
return NULL;
- return task->events[task->nr_events - 1];
+ return task->atoms[task->nr_events - 1];
}
static void
-add_sched_event_run(struct task_desc *task, nsec_t timestamp, u64 duration)
+add_sched_event_run(struct task_desc *task, u64 timestamp, u64 duration)
{
- struct sched_event *event, *curr_event = last_event(task);
+ struct sched_atom *event, *curr_event = last_event(task);
/*
* optimize an existing RUN event by merging this one
nr_run_events++;
}
-static unsigned long targetless_wakeups;
-static unsigned long multitarget_wakeups;
-
static void
-add_sched_event_wakeup(struct task_desc *task, nsec_t timestamp,
+add_sched_event_wakeup(struct task_desc *task, u64 timestamp,
struct task_desc *wakee)
{
- struct sched_event *event, *wakee_event;
+ struct sched_atom *event, *wakee_event;
event = get_new_event(task, timestamp);
event->type = SCHED_EVENT_WAKEUP;
return;
}
- wakee_event->wait_sem = calloc(1, sizeof(*wakee_event->wait_sem));
+ 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;
}
static void
-add_sched_event_sleep(struct task_desc *task, nsec_t timestamp,
- unsigned long uninterruptible __used)
+add_sched_event_sleep(struct task_desc *task, u64 timestamp,
+ u64 task_state __used)
{
- struct sched_event *event = get_new_event(task, timestamp);
+ struct sched_atom *event = get_new_event(task, timestamp);
event->type = SCHED_EVENT_SLEEP;
if (task)
return task;
- task = calloc(1, sizeof(*task));
+ task = zalloc(sizeof(*task));
task->pid = pid;
task->nr = nr_tasks;
strcpy(task->comm, comm);
BUG_ON(!tasks);
tasks[task->nr] = task;
- printk("registered task #%ld, PID %ld (%s)\n", nr_tasks, pid, comm);
+ if (verbose)
+ printf("registered task #%ld, PID %ld (%s)\n", nr_tasks, pid, comm);
return task;
}
-static int first_trace_line = 1;
-
-static nsec_t first_timestamp;
-static nsec_t prev_timestamp;
-
-void parse_line(char *line);
-
-void parse_line(char *line)
-{
- unsigned long param1 = 0, param2 = 0;
- char comm[COMM_LEN], comm2[COMM_LEN];
- unsigned long pid, pid2, timestamp0;
- struct task_desc *task, *task2;
- char func_str[SYM_LEN];
- nsec_t timestamp;
- int ret;
-
- //" <idle> 0 0D.s3 0us+: try_to_wake_up <events/0 9> (1 0)"
- ret = sscanf(line, "%20s %5ld %*s %ldus%*c:"
- " %128s <%20s %ld> (%ld %ld)\n",
- comm, &pid, ×tamp0,
- func_str, comm2, &pid2, ¶m1, ¶m2);
- dprintk("ret: %d\n", ret);
- if (ret != 8)
- return;
-
- timestamp = timestamp0 * 1000LL;
-
- if (first_trace_line) {
- first_trace_line = 0;
- first_timestamp = timestamp;
- }
-
- timestamp -= first_timestamp;
- BUG_ON(timestamp < prev_timestamp);
- prev_timestamp = timestamp;
-
- dprintk("parsed: %s - %ld %Ld: %s - <%s %ld> (%ld %ld)\n",
- comm,
- pid,
- timestamp,
- func_str,
- comm2,
- pid2,
- param1,
- param2);
-
- task = register_pid(pid, comm);
- task2 = register_pid(pid2, comm2);
-
- if (!strcmp(func_str, "update_curr")) {
- dprintk("%Ld: task %ld runs for %ld nsecs\n",
- timestamp, task->nr, param1);
- add_sched_event_run(task, timestamp, param1);
- } else if (!strcmp(func_str, "try_to_wake_up")) {
- dprintk("%Ld: task %ld wakes up task %ld\n",
- timestamp, task->nr, task2->nr);
- add_sched_event_wakeup(task, timestamp, task2);
- } else if (!strcmp(func_str, "deactivate_task")) {
- dprintk("%Ld: task %ld goes to sleep (uninterruptible: %ld)\n",
- timestamp, task->nr, param1);
- add_sched_event_sleep(task, timestamp, param1);
- }
-}
-
static void print_task_traces(void)
{
struct task_desc *task;
for (i = 0; i < nr_tasks; i++) {
task = tasks[i];
- printk("task %6ld (%20s:%10ld), nr_events: %ld\n",
+ printf("task %6ld (%20s:%10ld), nr_events: %ld\n",
task->nr, task->comm, task->pid, task->nr_events);
}
}
}
static void
-process_sched_event(struct task_desc *this_task __used, struct sched_event *event)
+process_sched_event(struct task_desc *this_task __used, struct sched_atom *atom)
{
int ret = 0;
- nsec_t now;
+ u64 now;
long long delta;
now = get_nsecs();
- delta = start_time + event->timestamp - now;
-
- dprintk("task %ld, event #%ld, %Ld, delta: %.3f (%Ld)\n",
- this_task->nr, event->nr, event->timestamp,
- (double)delta/1e6, delta);
-
- if (0 && delta > 0) {
- dprintk("%.3f: task %ld FIX %.3f\n",
- (double)event->timestamp/1e6,
- this_task->nr,
- (double)delta/1e6);
- sleep_nsecs(start_time + event->timestamp - now);
- nr_sleep_corrections++;
- }
+ delta = start_time + atom->timestamp - now;
- switch (event->type) {
+ switch (atom->type) {
case SCHED_EVENT_RUN:
- dprintk("%.3f: task %ld RUN for %.3f\n",
- (double)event->timestamp/1e6,
- this_task->nr,
- (double)event->duration/1e6);
- burn_nsecs(event->duration);
+ burn_nsecs(atom->duration);
break;
case SCHED_EVENT_SLEEP:
- dprintk("%.3f: task %ld %s SLEEP\n",
- (double)event->timestamp/1e6,
- this_task->nr, event->wait_sem ? "" : "SKIP");
- if (event->wait_sem)
- ret = sem_wait(event->wait_sem);
+ if (atom->wait_sem)
+ ret = sem_wait(atom->wait_sem);
BUG_ON(ret);
break;
case SCHED_EVENT_WAKEUP:
- dprintk("%.3f: task %ld WAKEUP => task %ld\n",
- (double)event->timestamp/1e6,
- this_task->nr,
- event->wakee->nr);
- if (event->wait_sem)
- ret = sem_post(event->wait_sem);
+ if (atom->wait_sem)
+ ret = sem_post(atom->wait_sem);
BUG_ON(ret);
break;
+ case SCHED_EVENT_MIGRATION:
+ break;
default:
BUG_ON(1);
}
}
-static nsec_t get_cpu_usage_nsec_parent(void)
+static u64 get_cpu_usage_nsec_parent(void)
{
struct rusage ru;
- nsec_t sum;
+ u64 sum;
int err;
err = getrusage(RUSAGE_SELF, &ru);
return sum;
}
-static nsec_t get_cpu_usage_nsec_self(void)
+static u64 get_cpu_usage_nsec_self(void)
{
char filename [] = "/proc/1234567890/sched";
unsigned long msecs, nsecs;
char *line = NULL;
- nsec_t total = 0;
+ u64 total = 0;
size_t len = 0;
ssize_t chars;
FILE *file;
BUG_ON(!file);
while ((chars = getline(&line, &len, file)) != -1) {
- dprintk("got line with length %zu :\n", chars);
- dprintk("%s", line);
ret = sscanf(line, "se.sum_exec_runtime : %ld.%06ld\n",
&msecs, &nsecs);
if (ret == 2) {
total = msecs*1e6 + nsecs;
- dprintk("total: (%ld.%06ld) %Ld\n",
- msecs, nsecs, total);
break;
}
}
static void *thread_func(void *ctx)
{
struct task_desc *this_task = ctx;
- nsec_t cpu_usage_0, cpu_usage_1;
+ u64 cpu_usage_0, cpu_usage_1;
unsigned long i, ret;
char comm2[22];
- dprintk("task %ld started up.\n", this_task->nr);
sprintf(comm2, ":%s", this_task->comm);
prctl(PR_SET_NAME, comm2);
again:
ret = sem_post(&this_task->ready_for_work);
BUG_ON(ret);
- D();
ret = pthread_mutex_lock(&start_work_mutex);
BUG_ON(ret);
ret = pthread_mutex_unlock(&start_work_mutex);
BUG_ON(ret);
- D();
cpu_usage_0 = get_cpu_usage_nsec_self();
for (i = 0; i < this_task->nr_events; i++) {
this_task->curr_event = i;
- process_sched_event(this_task, this_task->events[i]);
+ process_sched_event(this_task, this_task->atoms[i]);
}
cpu_usage_1 = get_cpu_usage_nsec_self();
this_task->cpu_usage = cpu_usage_1 - cpu_usage_0;
- dprintk("task %ld cpu usage: %0.3f msecs\n",
- this_task->nr, (double)this_task->cpu_usage / 1e6);
-
- D();
ret = sem_post(&this_task->work_done_sem);
BUG_ON(ret);
- D();
ret = pthread_mutex_lock(&work_done_wait_mutex);
BUG_ON(ret);
ret = pthread_mutex_unlock(&work_done_wait_mutex);
BUG_ON(ret);
- D();
goto again;
}
}
}
-static nsec_t cpu_usage;
-static nsec_t runavg_cpu_usage;
-static nsec_t parent_cpu_usage;
-static nsec_t runavg_parent_cpu_usage;
-
static void wait_for_tasks(void)
{
- nsec_t cpu_usage_0, cpu_usage_1;
+ u64 cpu_usage_0, cpu_usage_1;
struct task_desc *task;
unsigned long i, ret;
- DP();
start_time = get_nsecs();
- DP();
cpu_usage = 0;
pthread_mutex_unlock(&work_done_wait_mutex);
pthread_mutex_unlock(&start_work_mutex);
-#if 0
- for (i = 0; i < nr_tasks; i++) {
- unsigned long missed;
-
- task = tasks[i];
- while (task->curr_event + 1 < task->nr_events) {
- dprintk("parent waiting for %ld (%ld != %ld)\n",
- i, task->curr_event, task->nr_events);
- sleep_nsecs(100000000);
- }
- missed = task->nr_events - 1 - task->curr_event;
- if (missed)
- printk("task %ld missed events: %ld\n", i, missed);
- ret = sem_post(&task->sleep_sem);
- BUG_ON(ret);
- }
-#endif
- DP();
for (i = 0; i < nr_tasks; i++) {
task = tasks[i];
ret = sem_wait(&task->work_done_sem);
}
}
-static int __cmd_sched(void);
-
-static void parse_trace(void)
-{
- __cmd_sched();
-
- printk("nr_run_events: %ld\n", nr_run_events);
- printk("nr_sleep_events: %ld\n", nr_sleep_events);
- printk("nr_wakeup_events: %ld\n", nr_wakeup_events);
-
- if (targetless_wakeups)
- printk("target-less wakeups: %ld\n", targetless_wakeups);
- if (multitarget_wakeups)
- printk("multi-target wakeups: %ld\n", multitarget_wakeups);
- if (nr_run_events_optimized)
- printk("run events optimized: %ld\n",
- nr_run_events_optimized);
-}
-
-static unsigned long nr_runs;
-static nsec_t sum_runtime;
-static nsec_t sum_fluct;
-static nsec_t run_avg;
-
static void run_one_test(void)
{
- nsec_t T0, T1, delta, avg_delta, fluct, std_dev;
+ u64 T0, T1, delta, avg_delta, fluct, std_dev;
T0 = get_nsecs();
wait_for_tasks();
run_avg = delta;
run_avg = (run_avg*9 + delta)/10;
- printk("#%-3ld: %0.3f, ",
+ printf("#%-3ld: %0.3f, ",
nr_runs, (double)delta/1000000.0);
-#if 0
- printk("%0.2f +- %0.2f, ",
- (double)avg_delta/1e6, (double)std_dev/1e6);
-#endif
- printk("ravg: %0.2f, ",
+ printf("ravg: %0.2f, ",
(double)run_avg/1e6);
- printk("cpu: %0.2f / %0.2f",
+ printf("cpu: %0.2f / %0.2f",
(double)cpu_usage/1e6, (double)runavg_cpu_usage/1e6);
#if 0
* rusage statistics done by the parent, these are less
* accurate than the sum_exec_runtime based statistics:
*/
- printk(" [%0.2f / %0.2f]",
+ printf(" [%0.2f / %0.2f]",
(double)parent_cpu_usage/1e6,
(double)runavg_parent_cpu_usage/1e6);
#endif
- printk("\n");
+ printf("\n");
if (nr_sleep_corrections)
- printk(" (%ld sleep corrections)\n", nr_sleep_corrections);
+ printf(" (%ld sleep corrections)\n", nr_sleep_corrections);
nr_sleep_corrections = 0;
}
static void test_calibrations(void)
{
- nsec_t T0, T1;
+ u64 T0, T1;
T0 = get_nsecs();
burn_nsecs(1e6);
T1 = get_nsecs();
- printk("the run test took %Ld nsecs\n", T1-T0);
+ printf("the run test took %Ld nsecs\n", T1-T0);
T0 = get_nsecs();
sleep_nsecs(1e6);
T1 = get_nsecs();
- printk("the sleep test took %Ld nsecs\n", T1-T0);
+ printf("the sleep test took %Ld nsecs\n", T1-T0);
}
-static int
-process_comm_event(event_t *event, unsigned long offset, unsigned long head)
-{
- struct thread *thread;
+struct raw_event_sample {
+ u32 size;
+ char data[0];
+};
+
+#define FILL_FIELD(ptr, field, event, data) \
+ ptr.field = (typeof(ptr.field)) raw_field_value(event, #field, data)
+
+#define FILL_ARRAY(ptr, array, event, data) \
+do { \
+ void *__array = raw_field_ptr(event, #array, data); \
+ memcpy(ptr.array, __array, sizeof(ptr.array)); \
+} while(0)
+
+#define FILL_COMMON_FIELDS(ptr, event, data) \
+do { \
+ FILL_FIELD(ptr, common_type, event, data); \
+ FILL_FIELD(ptr, common_flags, event, data); \
+ FILL_FIELD(ptr, common_preempt_count, event, data); \
+ FILL_FIELD(ptr, common_pid, event, data); \
+ FILL_FIELD(ptr, common_tgid, event, data); \
+} while (0)
- thread = threads__findnew(event->comm.pid, &threads, &last_match);
- dump_printf("%p [%p]: PERF_EVENT_COMM: %s:%d\n",
- (void *)(offset + head),
- (void *)(long)(event->header.size),
- event->comm.comm, event->comm.pid);
- if (thread == NULL ||
- thread__set_comm(thread, event->comm.comm)) {
- dump_printf("problem processing PERF_EVENT_COMM, skipping event.\n");
- return -1;
- }
- total_comm++;
+struct trace_switch_event {
+ u32 size;
- return 0;
-}
+ u16 common_type;
+ u8 common_flags;
+ u8 common_preempt_count;
+ u32 common_pid;
+ u32 common_tgid;
+
+ char prev_comm[16];
+ u32 prev_pid;
+ u32 prev_prio;
+ u64 prev_state;
+ char next_comm[16];
+ u32 next_pid;
+ u32 next_prio;
+};
+
+struct trace_runtime_event {
+ u32 size;
+
+ u16 common_type;
+ u8 common_flags;
+ u8 common_preempt_count;
+ u32 common_pid;
+ u32 common_tgid;
+
+ char comm[16];
+ u32 pid;
+ u64 runtime;
+ u64 vruntime;
+};
struct trace_wakeup_event {
u32 size;
u32 cpu;
};
-static void
-process_sched_wakeup_event(struct trace_wakeup_event *wakeup_event, struct event *event,
- int cpu __used, u64 timestamp __used, struct thread *thread __used)
-{
- struct task_desc *waker, *wakee;
-
- printf("sched_wakeup event %p\n", event);
-
- printf(" ... pid %d woke up %s/%d\n",
- wakeup_event->common_pid,
- wakeup_event->comm,
- wakeup_event->pid);
+struct trace_fork_event {
+ u32 size;
- waker = register_pid(wakeup_event->common_pid, "<unknown>");
- wakee = register_pid(wakeup_event->pid, wakeup_event->comm);
+ u16 common_type;
+ u8 common_flags;
+ u8 common_preempt_count;
+ u32 common_pid;
+ u32 common_tgid;
- add_sched_event_wakeup(waker, timestamp, wakee);
-}
+ char parent_comm[16];
+ u32 parent_pid;
+ char child_comm[16];
+ u32 child_pid;
+};
-struct trace_switch_event {
+struct trace_migrate_task_event {
u32 size;
u16 common_type;
u32 common_pid;
u32 common_tgid;
- char prev_comm[16];
- u32 prev_pid;
- u32 prev_prio;
- u64 prev_state;
- char next_comm[16];
- u32 next_pid;
- u32 next_prio;
+ char comm[16];
+ u32 pid;
+
+ u32 prio;
+ u32 cpu;
+};
+
+struct trace_sched_handler {
+ void (*switch_event)(struct trace_switch_event *,
+ struct event *,
+ int cpu,
+ u64 timestamp,
+ struct thread *thread);
+
+ void (*runtime_event)(struct trace_runtime_event *,
+ struct event *,
+ int cpu,
+ u64 timestamp,
+ struct thread *thread);
+
+ void (*wakeup_event)(struct trace_wakeup_event *,
+ struct event *,
+ int cpu,
+ u64 timestamp,
+ struct thread *thread);
+
+ void (*fork_event)(struct trace_fork_event *,
+ struct event *,
+ int cpu,
+ u64 timestamp,
+ struct thread *thread);
+
+ void (*migrate_task_event)(struct trace_migrate_task_event *,
+ struct event *,
+ int cpu,
+ u64 timestamp,
+ struct thread *thread);
};
-#define MAX_CPUS 4096
-unsigned long cpu_last_switched[MAX_CPUS];
+static void
+replay_wakeup_event(struct trace_wakeup_event *wakeup_event,
+ struct event *event,
+ int cpu __used,
+ u64 timestamp __used,
+ struct thread *thread __used)
+{
+ struct task_desc *waker, *wakee;
+
+ if (verbose) {
+ printf("sched_wakeup event %p\n", event);
+
+ printf(" ... pid %d woke up %s/%d\n",
+ wakeup_event->common_pid,
+ wakeup_event->comm,
+ wakeup_event->pid);
+ }
+
+ waker = register_pid(wakeup_event->common_pid, "<unknown>");
+ wakee = register_pid(wakeup_event->pid, wakeup_event->comm);
+
+ add_sched_event_wakeup(waker, timestamp, wakee);
+}
+
+static u64 cpu_last_switched[MAX_CPUS];
static void
-process_sched_switch_event(struct trace_switch_event *switch_event, struct event *event,
- int cpu __used, u64 timestamp __used, struct thread *thread __used)
+replay_switch_event(struct trace_switch_event *switch_event,
+ struct event *event,
+ int cpu,
+ u64 timestamp,
+ struct thread *thread __used)
{
struct task_desc *prev, *next;
u64 timestamp0;
s64 delta;
- printf("sched_switch event %p\n", event);
+ if (verbose)
+ printf("sched_switch event %p\n", event);
+
if (cpu >= MAX_CPUS || cpu < 0)
return;
if (delta < 0)
die("hm, delta: %Ld < 0 ?\n", delta);
- printf(" ... switch from %s/%d to %s/%d [ran %Ld nsecs]\n",
- switch_event->prev_comm, switch_event->prev_pid,
- switch_event->next_comm, switch_event->next_pid,
- delta);
+ if (verbose) {
+ printf(" ... switch from %s/%d to %s/%d [ran %Ld nsecs]\n",
+ switch_event->prev_comm, switch_event->prev_pid,
+ switch_event->next_comm, switch_event->next_pid,
+ delta);
+ }
prev = register_pid(switch_event->prev_pid, switch_event->prev_comm);
next = register_pid(switch_event->next_pid, switch_event->next_comm);
cpu_last_switched[cpu] = timestamp;
add_sched_event_run(prev, timestamp, delta);
+ add_sched_event_sleep(prev, timestamp, switch_event->prev_state);
}
-struct trace_fork_event {
- u32 size;
-
- u16 common_type;
- u8 common_flags;
- u8 common_preempt_count;
- u32 common_pid;
- u32 common_tgid;
-
- char parent_comm[16];
- u32 parent_pid;
- char child_comm[16];
- u32 child_pid;
-};
static void
-process_sched_fork_event(struct trace_fork_event *fork_event, struct event *event,
- int cpu __used, u64 timestamp __used, struct thread *thread __used)
+replay_fork_event(struct trace_fork_event *fork_event,
+ struct event *event,
+ int cpu __used,
+ u64 timestamp __used,
+ struct thread *thread __used)
{
- printf("sched_fork event %p\n", event);
- printf("... parent: %s/%d\n", fork_event->parent_comm, fork_event->parent_pid);
- printf("... child: %s/%d\n", fork_event->child_comm, fork_event->child_pid);
+ if (verbose) {
+ printf("sched_fork event %p\n", event);
+ printf("... parent: %s/%d\n", fork_event->parent_comm, fork_event->parent_pid);
+ printf("... child: %s/%d\n", fork_event->child_comm, fork_event->child_pid);
+ }
register_pid(fork_event->parent_pid, fork_event->parent_comm);
register_pid(fork_event->child_pid, fork_event->child_comm);
}
-static void process_sched_exit_event(struct event *event,
- int cpu __used, u64 timestamp __used, struct thread *thread __used)
+static struct trace_sched_handler replay_ops = {
+ .wakeup_event = replay_wakeup_event,
+ .switch_event = replay_switch_event,
+ .fork_event = replay_fork_event,
+};
+
+struct sort_dimension {
+ const char *name;
+ sort_fn_t cmp;
+ struct list_head list;
+};
+
+static LIST_HEAD(cmp_pid);
+
+static int
+thread_lat_cmp(struct list_head *list, struct work_atoms *l, struct work_atoms *r)
+{
+ struct sort_dimension *sort;
+ int ret = 0;
+
+ BUG_ON(list_empty(list));
+
+ list_for_each_entry(sort, list, list) {
+ ret = sort->cmp(l, r);
+ if (ret)
+ return ret;
+ }
+
+ return ret;
+}
+
+static struct work_atoms *
+thread_atoms_search(struct rb_root *root, struct thread *thread,
+ struct list_head *sort_list)
+{
+ struct rb_node *node = root->rb_node;
+ struct work_atoms key = { .thread = thread };
+
+ while (node) {
+ struct work_atoms *atoms;
+ int cmp;
+
+ atoms = container_of(node, struct work_atoms, node);
+
+ cmp = thread_lat_cmp(sort_list, &key, atoms);
+ if (cmp > 0)
+ node = node->rb_left;
+ else if (cmp < 0)
+ node = node->rb_right;
+ else {
+ BUG_ON(thread != atoms->thread);
+ return atoms;
+ }
+ }
+ return NULL;
+}
+
+static void
+__thread_latency_insert(struct rb_root *root, struct work_atoms *data,
+ struct list_head *sort_list)
+{
+ struct rb_node **new = &(root->rb_node), *parent = NULL;
+
+ while (*new) {
+ struct work_atoms *this;
+ int cmp;
+
+ this = container_of(*new, struct work_atoms, node);
+ parent = *new;
+
+ cmp = thread_lat_cmp(sort_list, data, this);
+
+ if (cmp > 0)
+ new = &((*new)->rb_left);
+ else
+ new = &((*new)->rb_right);
+ }
+
+ rb_link_node(&data->node, parent, new);
+ rb_insert_color(&data->node, root);
+}
+
+static void thread_atoms_insert(struct thread *thread)
+{
+ struct work_atoms *atoms = zalloc(sizeof(*atoms));
+ if (!atoms)
+ die("No memory");
+
+ atoms->thread = thread;
+ INIT_LIST_HEAD(&atoms->work_list);
+ __thread_latency_insert(&atom_root, atoms, &cmp_pid);
+}
+
+static void
+latency_fork_event(struct trace_fork_event *fork_event __used,
+ struct event *event __used,
+ int cpu __used,
+ u64 timestamp __used,
+ struct thread *thread __used)
+{
+ /* should insert the newcomer */
+}
+
+__used
+static char sched_out_state(struct trace_switch_event *switch_event)
+{
+ const char *str = TASK_STATE_TO_CHAR_STR;
+
+ return str[switch_event->prev_state];
+}
+
+static void
+add_sched_out_event(struct work_atoms *atoms,
+ char run_state,
+ u64 timestamp)
+{
+ struct work_atom *atom = zalloc(sizeof(*atom));
+ if (!atom)
+ die("Non memory");
+
+ atom->sched_out_time = timestamp;
+
+ if (run_state == 'R') {
+ atom->state = THREAD_WAIT_CPU;
+ atom->wake_up_time = atom->sched_out_time;
+ }
+
+ list_add_tail(&atom->list, &atoms->work_list);
+}
+
+static void
+add_runtime_event(struct work_atoms *atoms, u64 delta, u64 timestamp __used)
+{
+ struct work_atom *atom;
+
+ BUG_ON(list_empty(&atoms->work_list));
+
+ atom = list_entry(atoms->work_list.prev, struct work_atom, list);
+
+ atom->runtime += delta;
+ atoms->total_runtime += delta;
+}
+
+static void
+add_sched_in_event(struct work_atoms *atoms, u64 timestamp)
+{
+ struct work_atom *atom;
+ u64 delta;
+
+ if (list_empty(&atoms->work_list))
+ return;
+
+ atom = list_entry(atoms->work_list.prev, struct work_atom, list);
+
+ if (atom->state != THREAD_WAIT_CPU)
+ return;
+
+ if (timestamp < atom->wake_up_time) {
+ atom->state = THREAD_IGNORE;
+ return;
+ }
+
+ atom->state = THREAD_SCHED_IN;
+ atom->sched_in_time = timestamp;
+
+ delta = atom->sched_in_time - atom->wake_up_time;
+ atoms->total_lat += delta;
+ if (delta > atoms->max_lat)
+ atoms->max_lat = delta;
+ atoms->nb_atoms++;
+}
+
+static void
+latency_switch_event(struct trace_switch_event *switch_event,
+ struct event *event __used,
+ int cpu,
+ u64 timestamp,
+ struct thread *thread __used)
+{
+ struct work_atoms *out_events, *in_events;
+ struct thread *sched_out, *sched_in;
+ u64 timestamp0;
+ s64 delta;
+
+ BUG_ON(cpu >= MAX_CPUS || cpu < 0);
+
+ timestamp0 = cpu_last_switched[cpu];
+ cpu_last_switched[cpu] = timestamp;
+ if (timestamp0)
+ delta = timestamp - timestamp0;
+ else
+ delta = 0;
+
+ if (delta < 0)
+ die("hm, delta: %Ld < 0 ?\n", delta);
+
+
+ sched_out = threads__findnew(switch_event->prev_pid);
+ sched_in = threads__findnew(switch_event->next_pid);
+
+ out_events = thread_atoms_search(&atom_root, sched_out, &cmp_pid);
+ if (!out_events) {
+ thread_atoms_insert(sched_out);
+ out_events = thread_atoms_search(&atom_root, sched_out, &cmp_pid);
+ if (!out_events)
+ die("out-event: Internal tree error");
+ }
+ add_sched_out_event(out_events, sched_out_state(switch_event), timestamp);
+
+ in_events = thread_atoms_search(&atom_root, sched_in, &cmp_pid);
+ if (!in_events) {
+ thread_atoms_insert(sched_in);
+ in_events = thread_atoms_search(&atom_root, sched_in, &cmp_pid);
+ if (!in_events)
+ die("in-event: Internal tree error");
+ /*
+ * Take came in we have not heard about yet,
+ * add in an initial atom in runnable state:
+ */
+ add_sched_out_event(in_events, 'R', timestamp);
+ }
+ add_sched_in_event(in_events, timestamp);
+}
+
+static void
+latency_runtime_event(struct trace_runtime_event *runtime_event,
+ struct event *event __used,
+ int cpu,
+ u64 timestamp,
+ struct thread *this_thread __used)
+{
+ struct thread *thread = threads__findnew(runtime_event->pid);
+ struct work_atoms *atoms = thread_atoms_search(&atom_root, thread, &cmp_pid);
+
+ BUG_ON(cpu >= MAX_CPUS || cpu < 0);
+ if (!atoms) {
+ thread_atoms_insert(thread);
+ atoms = thread_atoms_search(&atom_root, thread, &cmp_pid);
+ if (!atoms)
+ die("in-event: Internal tree error");
+ add_sched_out_event(atoms, 'R', timestamp);
+ }
+
+ add_runtime_event(atoms, runtime_event->runtime, timestamp);
+}
+
+static void
+latency_wakeup_event(struct trace_wakeup_event *wakeup_event,
+ struct event *__event __used,
+ int cpu __used,
+ u64 timestamp,
+ struct thread *thread __used)
+{
+ struct work_atoms *atoms;
+ struct work_atom *atom;
+ struct thread *wakee;
+
+ /* Note for later, it may be interesting to observe the failing cases */
+ if (!wakeup_event->success)
+ return;
+
+ wakee = threads__findnew(wakeup_event->pid);
+ atoms = thread_atoms_search(&atom_root, wakee, &cmp_pid);
+ if (!atoms) {
+ thread_atoms_insert(wakee);
+ atoms = thread_atoms_search(&atom_root, wakee, &cmp_pid);
+ if (!atoms)
+ die("wakeup-event: Internal tree error");
+ add_sched_out_event(atoms, 'S', timestamp);
+ }
+
+ BUG_ON(list_empty(&atoms->work_list));
+
+ atom = list_entry(atoms->work_list.prev, struct work_atom, list);
+
+ /*
+ * 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 (profile_cpu == -1 && atom->state != THREAD_SLEEPING)
+ nr_state_machine_bugs++;
+
+ nr_timestamps++;
+ if (atom->sched_out_time > timestamp) {
+ nr_unordered_timestamps++;
+ return;
+ }
+
+ atom->state = THREAD_WAIT_CPU;
+ atom->wake_up_time = timestamp;
+}
+
+static void
+latency_migrate_task_event(struct trace_migrate_task_event *migrate_task_event,
+ struct event *__event __used,
+ int cpu __used,
+ u64 timestamp,
+ struct thread *thread __used)
+{
+ struct work_atoms *atoms;
+ struct work_atom *atom;
+ struct thread *migrant;
+
+ /*
+ * Only need to worry about migration when profiling one CPU.
+ */
+ if (profile_cpu == -1)
+ return;
+
+ migrant = threads__findnew(migrate_task_event->pid);
+ atoms = thread_atoms_search(&atom_root, migrant, &cmp_pid);
+ if (!atoms) {
+ thread_atoms_insert(migrant);
+ register_pid(migrant->pid, migrant->comm);
+ atoms = thread_atoms_search(&atom_root, migrant, &cmp_pid);
+ if (!atoms)
+ die("migration-event: Internal tree error");
+ add_sched_out_event(atoms, 'R', timestamp);
+ }
+
+ 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;
+
+ nr_timestamps++;
+
+ if (atom->sched_out_time > timestamp)
+ nr_unordered_timestamps++;
+}
+
+static struct trace_sched_handler lat_ops = {
+ .wakeup_event = latency_wakeup_event,
+ .switch_event = latency_switch_event,
+ .runtime_event = latency_runtime_event,
+ .fork_event = latency_fork_event,
+ .migrate_task_event = latency_migrate_task_event,
+};
+
+static void output_lat_thread(struct work_atoms *work_list)
+{
+ int i;
+ int ret;
+ u64 avg;
+
+ if (!work_list->nb_atoms)
+ return;
+ /*
+ * Ignore idle threads:
+ */
+ if (!strcmp(work_list->thread->comm, "swapper"))
+ return;
+
+ all_runtime += work_list->total_runtime;
+ all_count += work_list->nb_atoms;
+
+ ret = printf(" %s:%d ", work_list->thread->comm, work_list->thread->pid);
+
+ for (i = 0; i < 24 - ret; i++)
+ printf(" ");
+
+ avg = work_list->total_lat / work_list->nb_atoms;
+
+ printf("|%11.3f ms |%9llu | avg:%9.3f ms | max:%9.3f ms |\n",
+ (double)work_list->total_runtime / 1e6,
+ work_list->nb_atoms, (double)avg / 1e6,
+ (double)work_list->max_lat / 1e6);
+}
+
+static int pid_cmp(struct work_atoms *l, struct work_atoms *r)
+{
+ if (l->thread->pid < r->thread->pid)
+ return -1;
+ if (l->thread->pid > r->thread->pid)
+ return 1;
+
+ return 0;
+}
+
+static struct sort_dimension pid_sort_dimension = {
+ .name = "pid",
+ .cmp = pid_cmp,
+};
+
+static int avg_cmp(struct work_atoms *l, struct work_atoms *r)
+{
+ u64 avgl, avgr;
+
+ if (!l->nb_atoms)
+ return -1;
+
+ if (!r->nb_atoms)
+ return 1;
+
+ avgl = l->total_lat / l->nb_atoms;
+ avgr = r->total_lat / r->nb_atoms;
+
+ if (avgl < avgr)
+ return -1;
+ if (avgl > avgr)
+ return 1;
+
+ return 0;
+}
+
+static struct sort_dimension avg_sort_dimension = {
+ .name = "avg",
+ .cmp = avg_cmp,
+};
+
+static int max_cmp(struct work_atoms *l, struct work_atoms *r)
+{
+ if (l->max_lat < r->max_lat)
+ return -1;
+ if (l->max_lat > r->max_lat)
+ return 1;
+
+ return 0;
+}
+
+static struct sort_dimension max_sort_dimension = {
+ .name = "max",
+ .cmp = max_cmp,
+};
+
+static int switch_cmp(struct work_atoms *l, struct work_atoms *r)
+{
+ if (l->nb_atoms < r->nb_atoms)
+ return -1;
+ if (l->nb_atoms > r->nb_atoms)
+ return 1;
+
+ return 0;
+}
+
+static struct sort_dimension switch_sort_dimension = {
+ .name = "switch",
+ .cmp = switch_cmp,
+};
+
+static int runtime_cmp(struct work_atoms *l, struct work_atoms *r)
+{
+ if (l->total_runtime < r->total_runtime)
+ return -1;
+ if (l->total_runtime > r->total_runtime)
+ return 1;
+
+ return 0;
+}
+
+static struct sort_dimension runtime_sort_dimension = {
+ .name = "runtime",
+ .cmp = runtime_cmp,
+};
+
+static struct sort_dimension *available_sorts[] = {
+ &pid_sort_dimension,
+ &avg_sort_dimension,
+ &max_sort_dimension,
+ &switch_sort_dimension,
+ &runtime_sort_dimension,
+};
+
+#define NB_AVAILABLE_SORTS (int)(sizeof(available_sorts) / sizeof(struct sort_dimension *))
+
+static LIST_HEAD(sort_list);
+
+static int sort_dimension__add(const char *tok, struct list_head *list)
+{
+ int i;
+
+ for (i = 0; i < NB_AVAILABLE_SORTS; i++) {
+ if (!strcmp(available_sorts[i]->name, tok)) {
+ list_add_tail(&available_sorts[i]->list, list);
+
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
+static void setup_sorting(void);
+
+static void sort_lat(void)
+{
+ struct rb_node *node;
+
+ for (;;) {
+ struct work_atoms *data;
+ node = rb_first(&atom_root);
+ if (!node)
+ break;
+
+ rb_erase(node, &atom_root);
+ data = rb_entry(node, struct work_atoms, node);
+ __thread_latency_insert(&sorted_atom_root, data, &sort_list);
+ }
+}
+
+static struct trace_sched_handler *trace_handler;
+
+static void
+process_sched_wakeup_event(struct raw_event_sample *raw,
+ struct event *event,
+ int cpu __used,
+ u64 timestamp __used,
+ struct thread *thread __used)
+{
+ struct trace_wakeup_event wakeup_event;
+
+ FILL_COMMON_FIELDS(wakeup_event, event, raw->data);
+
+ FILL_ARRAY(wakeup_event, comm, event, raw->data);
+ FILL_FIELD(wakeup_event, pid, event, raw->data);
+ FILL_FIELD(wakeup_event, prio, event, raw->data);
+ FILL_FIELD(wakeup_event, success, event, raw->data);
+ FILL_FIELD(wakeup_event, cpu, event, raw->data);
+
+ if (trace_handler->wakeup_event)
+ trace_handler->wakeup_event(&wakeup_event, event, cpu, timestamp, thread);
+}
+
+/*
+ * Track the current task - that way we can know whether there's any
+ * weird events, such as a task being switched away that is not current.
+ */
+static int max_cpu;
+
+static u32 curr_pid[MAX_CPUS] = { [0 ... MAX_CPUS-1] = -1 };
+
+static struct thread *curr_thread[MAX_CPUS];
+
+static char next_shortname1 = 'A';
+static char next_shortname2 = '0';
+
+static void
+map_switch_event(struct trace_switch_event *switch_event,
+ struct event *event __used,
+ int this_cpu,
+ u64 timestamp,
+ struct thread *thread __used)
+{
+ struct thread *sched_out, *sched_in;
+ int new_shortname;
+ u64 timestamp0;
+ s64 delta;
+ int cpu;
+
+ BUG_ON(this_cpu >= MAX_CPUS || this_cpu < 0);
+
+ if (this_cpu > max_cpu)
+ max_cpu = this_cpu;
+
+ timestamp0 = cpu_last_switched[this_cpu];
+ cpu_last_switched[this_cpu] = timestamp;
+ if (timestamp0)
+ delta = timestamp - timestamp0;
+ else
+ delta = 0;
+
+ if (delta < 0)
+ die("hm, delta: %Ld < 0 ?\n", delta);
+
+
+ sched_out = threads__findnew(switch_event->prev_pid);
+ sched_in = threads__findnew(switch_event->next_pid);
+
+ curr_thread[this_cpu] = sched_in;
+
+ printf(" ");
+
+ new_shortname = 0;
+ if (!sched_in->shortname[0]) {
+ sched_in->shortname[0] = next_shortname1;
+ sched_in->shortname[1] = next_shortname2;
+
+ if (next_shortname1 < 'Z') {
+ next_shortname1++;
+ } else {
+ next_shortname1='A';
+ if (next_shortname2 < '9') {
+ next_shortname2++;
+ } else {
+ next_shortname2='0';
+ }
+ }
+ new_shortname = 1;
+ }
+
+ for (cpu = 0; cpu <= max_cpu; cpu++) {
+ if (cpu != this_cpu)
+ printf(" ");
+ else
+ printf("*");
+
+ if (curr_thread[cpu]) {
+ if (curr_thread[cpu]->pid)
+ printf("%2s ", curr_thread[cpu]->shortname);
+ else
+ printf(". ");
+ } else
+ printf(" ");
+ }
+
+ printf(" %12.6f secs ", (double)timestamp/1e9);
+ if (new_shortname) {
+ printf("%s => %s:%d\n",
+ sched_in->shortname, sched_in->comm, sched_in->pid);
+ } else {
+ printf("\n");
+ }
+}
+
+
+static void
+process_sched_switch_event(struct raw_event_sample *raw,
+ struct event *event,
+ int this_cpu,
+ u64 timestamp __used,
+ struct thread *thread __used)
+{
+ struct trace_switch_event switch_event;
+
+ FILL_COMMON_FIELDS(switch_event, event, raw->data);
+
+ FILL_ARRAY(switch_event, prev_comm, event, raw->data);
+ FILL_FIELD(switch_event, prev_pid, event, raw->data);
+ FILL_FIELD(switch_event, prev_prio, event, raw->data);
+ FILL_FIELD(switch_event, prev_state, event, raw->data);
+ FILL_ARRAY(switch_event, next_comm, event, raw->data);
+ FILL_FIELD(switch_event, next_pid, event, raw->data);
+ FILL_FIELD(switch_event, next_prio, event, raw->data);
+
+ if (curr_pid[this_cpu] != (u32)-1) {
+ /*
+ * Are we trying to switch away a PID that is
+ * not current?
+ */
+ if (curr_pid[this_cpu] != switch_event.prev_pid)
+ nr_context_switch_bugs++;
+ }
+ if (trace_handler->switch_event)
+ trace_handler->switch_event(&switch_event, event, this_cpu, timestamp, thread);
+
+ curr_pid[this_cpu] = switch_event.next_pid;
+}
+
+static void
+process_sched_runtime_event(struct raw_event_sample *raw,
+ struct event *event,
+ int cpu __used,
+ u64 timestamp __used,
+ struct thread *thread __used)
{
- printf("sched_exit event %p\n", event);
+ struct trace_runtime_event runtime_event;
+
+ FILL_ARRAY(runtime_event, comm, event, raw->data);
+ FILL_FIELD(runtime_event, pid, event, raw->data);
+ FILL_FIELD(runtime_event, runtime, event, raw->data);
+ FILL_FIELD(runtime_event, vruntime, event, raw->data);
+
+ if (trace_handler->runtime_event)
+ trace_handler->runtime_event(&runtime_event, event, cpu, timestamp, thread);
}
static void
-process_raw_event(event_t *raw_event, void *more_data,
+process_sched_fork_event(struct raw_event_sample *raw,
+ struct event *event,
+ int cpu __used,
+ u64 timestamp __used,
+ struct thread *thread __used)
+{
+ struct trace_fork_event fork_event;
+
+ FILL_COMMON_FIELDS(fork_event, event, raw->data);
+
+ FILL_ARRAY(fork_event, parent_comm, event, raw->data);
+ FILL_FIELD(fork_event, parent_pid, event, raw->data);
+ FILL_ARRAY(fork_event, child_comm, event, raw->data);
+ FILL_FIELD(fork_event, child_pid, event, raw->data);
+
+ if (trace_handler->fork_event)
+ trace_handler->fork_event(&fork_event, event, cpu, timestamp, thread);
+}
+
+static void
+process_sched_exit_event(struct event *event,
+ int cpu __used,
+ u64 timestamp __used,
+ struct thread *thread __used)
+{
+ if (verbose)
+ printf("sched_exit event %p\n", event);
+}
+
+static void
+process_sched_migrate_task_event(struct raw_event_sample *raw,
+ struct event *event,
+ int cpu __used,
+ u64 timestamp __used,
+ struct thread *thread __used)
+{
+ struct trace_migrate_task_event migrate_task_event;
+
+ FILL_COMMON_FIELDS(migrate_task_event, event, raw->data);
+
+ FILL_ARRAY(migrate_task_event, comm, event, raw->data);
+ FILL_FIELD(migrate_task_event, pid, event, raw->data);
+ FILL_FIELD(migrate_task_event, prio, event, raw->data);
+ FILL_FIELD(migrate_task_event, cpu, event, raw->data);
+
+ if (trace_handler->migrate_task_event)
+ trace_handler->migrate_task_event(&migrate_task_event, event, cpu, timestamp, thread);
+}
+
+static void
+process_raw_event(event_t *raw_event __used, void *more_data,
int cpu, u64 timestamp, struct thread *thread)
{
- struct {
- u32 size;
- char data[0];
- } *raw = more_data;
+ struct raw_event_sample *raw = more_data;
struct event *event;
int type;
type = trace_parse_common_type(raw->data);
event = trace_find_event(type);
- /*
- * FIXME: better resolve from pid from the struct trace_entry
- * field, although it should be the same than this perf
- * event pid
- */
- printf("id %d, type: %d, event: %s\n",
- raw_event->header.type, type, event->name);
-
if (!strcmp(event->name, "sched_switch"))
- process_sched_switch_event(more_data, event, cpu, timestamp, thread);
+ process_sched_switch_event(raw, event, cpu, timestamp, thread);
+ if (!strcmp(event->name, "sched_stat_runtime"))
+ process_sched_runtime_event(raw, event, cpu, timestamp, thread);
if (!strcmp(event->name, "sched_wakeup"))
- process_sched_wakeup_event(more_data, event, cpu, timestamp, thread);
+ process_sched_wakeup_event(raw, event, cpu, timestamp, thread);
if (!strcmp(event->name, "sched_wakeup_new"))
- process_sched_wakeup_event(more_data, event, cpu, timestamp, thread);
+ process_sched_wakeup_event(raw, event, cpu, timestamp, thread);
if (!strcmp(event->name, "sched_process_fork"))
- process_sched_fork_event(more_data, event, cpu, timestamp, thread);
+ process_sched_fork_event(raw, event, cpu, timestamp, thread);
if (!strcmp(event->name, "sched_process_exit"))
process_sched_exit_event(event, cpu, timestamp, thread);
+ if (!strcmp(event->name, "sched_migrate_task"))
+ process_sched_migrate_task_event(raw, event, cpu, timestamp, thread);
}
-static int
-process_sample_event(event_t *event, unsigned long offset, unsigned long head)
+static int process_sample_event(event_t *event)
{
- char level;
- int show = 0;
- struct dso *dso = NULL;
struct thread *thread;
u64 ip = event->ip.ip;
u64 timestamp = -1;
u32 cpu = -1;
u64 period = 1;
void *more_data = event->ip.__more_data;
- int cpumode;
- thread = threads__findnew(event->ip.pid, &threads, &last_match);
+ if (!(sample_type & PERF_SAMPLE_RAW))
+ return 0;
+
+ thread = threads__findnew(event->ip.pid);
if (sample_type & PERF_SAMPLE_TIME) {
timestamp = *(u64 *)more_data;
more_data += sizeof(u64);
}
- dump_printf("%p [%p]: PERF_EVENT_SAMPLE (IP, %d): %d/%d: %p period: %Ld\n",
- (void *)(offset + head),
- (void *)(long)(event->header.size),
+ dump_printf("(IP, %d): %d/%d: %p period: %Ld\n",
event->header.misc,
event->ip.pid, event->ip.tid,
(void *)(long)ip,
(long long)period);
- dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
-
if (thread == NULL) {
- eprintf("problem processing %d event, skipping it.\n",
- event->header.type);
+ pr_debug("problem processing %d event, skipping it.\n",
+ event->header.type);
return -1;
}
- cpumode = event->header.misc & PERF_EVENT_MISC_CPUMODE_MASK;
-
- if (cpumode == PERF_EVENT_MISC_KERNEL) {
- show = SHOW_KERNEL;
- level = 'k';
-
- dso = kernel_dso;
-
- dump_printf(" ...... dso: %s\n", dso->name);
-
- } else if (cpumode == PERF_EVENT_MISC_USER) {
-
- show = SHOW_USER;
- level = '.';
-
- } else {
- show = SHOW_HV;
- level = 'H';
-
- dso = hypervisor_dso;
+ dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
- dump_printf(" ...... dso: [hypervisor]\n");
- }
+ if (profile_cpu != -1 && profile_cpu != (int) cpu)
+ return 0;
- if (sample_type & PERF_SAMPLE_RAW)
- process_raw_event(event, more_data, cpu, timestamp, thread);
+ process_raw_event(event, more_data, cpu, timestamp, thread);
return 0;
}
-static int
-process_event(event_t *event, unsigned long offset, unsigned long head)
+static int process_lost_event(event_t *event __used)
{
- trace_event(event);
-
- switch (event->header.type) {
- case PERF_EVENT_MMAP ... PERF_EVENT_LOST:
- return 0;
-
- case PERF_EVENT_COMM:
- return process_comm_event(event, offset, head);
+ nr_lost_chunks++;
+ nr_lost_events += event->lost.lost;
- case PERF_EVENT_EXIT ... PERF_EVENT_READ:
- return 0;
+ return 0;
+}
- case PERF_EVENT_SAMPLE:
- return process_sample_event(event, offset, head);
+static int sample_type_check(u64 type)
+{
+ sample_type = type;
- case PERF_EVENT_MAX:
- default:
+ if (!(sample_type & PERF_SAMPLE_RAW)) {
+ fprintf(stderr,
+ "No trace sample to read. Did you call perf record "
+ "without -R?");
return -1;
}
return 0;
}
-static int __cmd_sched(void)
+static struct perf_file_handler file_handler = {
+ .process_sample_event = process_sample_event,
+ .process_comm_event = event__process_comm,
+ .process_lost_event = process_lost_event,
+ .sample_type_check = sample_type_check,
+};
+
+static int read_events(void)
{
- int ret, rc = EXIT_FAILURE;
- unsigned long offset = 0;
- unsigned long head = 0;
- struct stat perf_stat;
- event_t *event;
- uint32_t size;
- char *buf;
+ register_idle_thread();
+ register_perf_file_handler(&file_handler);
- trace_report();
- register_idle_thread(&threads, &last_match);
+ return mmap_dispatch_perf_file(&header, input_name, 0, 0,
+ &event__cwdlen, &event__cwd);
+}
- input = open(input_name, O_RDONLY);
- if (input < 0) {
- perror("failed to open file");
- exit(-1);
+static void print_bad_events(void)
+{
+ if (nr_unordered_timestamps && nr_timestamps) {
+ printf(" INFO: %.3f%% unordered timestamps (%ld out of %ld)\n",
+ (double)nr_unordered_timestamps/(double)nr_timestamps*100.0,
+ nr_unordered_timestamps, nr_timestamps);
}
-
- ret = fstat(input, &perf_stat);
- if (ret < 0) {
- perror("failed to stat file");
- exit(-1);
+ if (nr_lost_events && nr_events) {
+ printf(" INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n",
+ (double)nr_lost_events/(double)nr_events*100.0,
+ nr_lost_events, nr_events, nr_lost_chunks);
}
-
- if (!perf_stat.st_size) {
- fprintf(stderr, "zero-sized file, nothing to do!\n");
- exit(0);
+ if (nr_state_machine_bugs && nr_timestamps) {
+ printf(" INFO: %.3f%% state machine bugs (%ld out of %ld)",
+ (double)nr_state_machine_bugs/(double)nr_timestamps*100.0,
+ nr_state_machine_bugs, nr_timestamps);
+ if (nr_lost_events)
+ printf(" (due to lost events?)");
+ printf("\n");
+ }
+ if (nr_context_switch_bugs && nr_timestamps) {
+ printf(" INFO: %.3f%% context switch bugs (%ld out of %ld)",
+ (double)nr_context_switch_bugs/(double)nr_timestamps*100.0,
+ nr_context_switch_bugs, nr_timestamps);
+ if (nr_lost_events)
+ printf(" (due to lost events?)");
+ printf("\n");
}
- header = perf_header__read(input);
- head = header->data_offset;
- sample_type = perf_header__sample_type(header);
+}
- if (!(sample_type & PERF_SAMPLE_RAW))
- die("No trace sample to read. Did you call perf record "
- "without -R?");
+static void __cmd_lat(void)
+{
+ struct rb_node *next;
- if (load_kernel() < 0) {
- perror("failed to load kernel symbols");
- return EXIT_FAILURE;
- }
+ setup_pager();
+ read_events();
+ sort_lat();
+
+ printf("\n -----------------------------------------------------------------------------------------\n");
+ printf(" Task | Runtime ms | Switches | Average delay ms | Maximum delay ms |\n");
+ printf(" -----------------------------------------------------------------------------------------\n");
+
+ next = rb_first(&sorted_atom_root);
+
+ while (next) {
+ struct work_atoms *work_list;
-remap:
- buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
- MAP_SHARED, input, offset);
- if (buf == MAP_FAILED) {
- perror("failed to mmap file");
- exit(-1);
+ work_list = rb_entry(next, struct work_atoms, node);
+ output_lat_thread(work_list);
+ next = rb_next(next);
}
-more:
- event = (event_t *)(buf + head);
+ printf(" -----------------------------------------------------------------------------------------\n");
+ printf(" TOTAL: |%11.3f ms |%9Ld |\n",
+ (double)all_runtime/1e6, all_count);
- size = event->header.size;
- if (!size)
- size = 8;
+ printf(" ---------------------------------------------------\n");
- if (head + event->header.size >= page_size * mmap_window) {
- unsigned long shift = page_size * (head / page_size);
- int res;
+ print_bad_events();
+ printf("\n");
- res = munmap(buf, page_size * mmap_window);
- assert(res == 0);
+}
- offset += shift;
- head -= shift;
- goto remap;
- }
+static struct trace_sched_handler map_ops = {
+ .wakeup_event = NULL,
+ .switch_event = map_switch_event,
+ .runtime_event = NULL,
+ .fork_event = NULL,
+};
- size = event->header.size;
+static void __cmd_map(void)
+{
+ max_cpu = sysconf(_SC_NPROCESSORS_CONF);
+ setup_pager();
+ read_events();
+ print_bad_events();
+}
- if (!size || process_event(event, offset, head) < 0) {
+static void __cmd_replay(void)
+{
+ unsigned long i;
- /*
- * assume we lost track of the stream, check alignment, and
- * increment a single u64 in the hope to catch on again 'soon'.
- */
+ calibrate_run_measurement_overhead();
+ calibrate_sleep_measurement_overhead();
- if (unlikely(head & 7))
- head &= ~7ULL;
+ test_calibrations();
- size = 8;
- }
+ read_events();
- head += size;
+ printf("nr_run_events: %ld\n", nr_run_events);
+ printf("nr_sleep_events: %ld\n", nr_sleep_events);
+ printf("nr_wakeup_events: %ld\n", nr_wakeup_events);
- if (offset + head < (unsigned long)perf_stat.st_size)
- goto more;
+ if (targetless_wakeups)
+ printf("target-less wakeups: %ld\n", targetless_wakeups);
+ if (multitarget_wakeups)
+ printf("multi-target wakeups: %ld\n", multitarget_wakeups);
+ if (nr_run_events_optimized)
+ printf("run atoms optimized: %ld\n",
+ nr_run_events_optimized);
- rc = EXIT_SUCCESS;
- close(input);
+ print_task_traces();
+ add_cross_task_wakeups();
- return rc;
+ create_tasks();
+ printf("------------------------------------------------------------\n");
+ for (i = 0; i < replay_repeat; i++)
+ run_one_test();
}
-static const char * const annotate_usage[] = {
- "perf trace [<options>] <command>",
+
+static const char * const sched_usage[] = {
+ "perf sched [<options>] {record|latency|map|replay|trace}",
NULL
};
-static const struct option options[] = {
+static const struct option sched_options[] = {
+ OPT_STRING('i', "input", &input_name, "file",
+ "input file name"),
+ OPT_BOOLEAN('v', "verbose", &verbose,
+ "be more verbose (show symbol address, etc)"),
OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
"dump raw trace in ASCII"),
+ OPT_END()
+};
+
+static const char * const latency_usage[] = {
+ "perf sched latency [<options>]",
+ NULL
+};
+
+static const struct option latency_options[] = {
+ OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
+ "sort by key(s): runtime, switch, avg, max"),
OPT_BOOLEAN('v', "verbose", &verbose,
"be more verbose (show symbol address, etc)"),
+ OPT_INTEGER('C', "CPU", &profile_cpu,
+ "CPU to profile on"),
+ OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
+ "dump raw trace in ASCII"),
OPT_END()
};
-int cmd_sched(int argc, const char **argv, const char *prefix __used)
-{
- long nr_iterations = 10, i;
+static const char * const replay_usage[] = {
+ "perf sched replay [<options>]",
+ NULL
+};
+
+static const struct option replay_options[] = {
+ OPT_INTEGER('r', "repeat", &replay_repeat,
+ "repeat the workload replay N times (-1: infinite)"),
+ OPT_BOOLEAN('v', "verbose", &verbose,
+ "be more verbose (show symbol address, etc)"),
+ OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
+ "dump raw trace in ASCII"),
+ OPT_END()
+};
- symbol__init();
- page_size = getpagesize();
+static void setup_sorting(void)
+{
+ char *tmp, *tok, *str = strdup(sort_order);
- argc = parse_options(argc, argv, options, annotate_usage, 0);
- if (argc) {
- /*
- * Special case: if there's an argument left then assume tha
- * it's a symbol filter:
- */
- if (argc > 1)
- usage_with_options(annotate_usage, options);
+ for (tok = strtok_r(str, ", ", &tmp);
+ tok; tok = strtok_r(NULL, ", ", &tmp)) {
+ if (sort_dimension__add(tok, &sort_list) < 0) {
+ error("Unknown --sort key: `%s'", tok);
+ usage_with_options(latency_usage, latency_options);
+ }
}
-// setup_pager();
+ free(str);
- calibrate_run_measurement_overhead();
- calibrate_sleep_measurement_overhead();
+ sort_dimension__add("pid", &cmp_pid);
+}
- test_calibrations();
+static const char *record_args[] = {
+ "record",
+ "-a",
+ "-R",
+ "-M",
+ "-f",
+ "-m", "1024",
+ "-c", "1",
+ "-e", "sched:sched_switch:r",
+ "-e", "sched:sched_stat_wait:r",
+ "-e", "sched:sched_stat_sleep:r",
+ "-e", "sched:sched_stat_iowait:r",
+ "-e", "sched:sched_stat_runtime:r",
+ "-e", "sched:sched_process_exit:r",
+ "-e", "sched:sched_process_fork:r",
+ "-e", "sched:sched_wakeup:r",
+ "-e", "sched:sched_migrate_task:r",
+};
- parse_trace();
- print_task_traces();
- add_cross_task_wakeups();
+static int __cmd_record(int argc, const char **argv)
+{
+ unsigned int rec_argc, i, j;
+ const char **rec_argv;
- create_tasks();
- printk("------------------------------------------------------------\n");
- for (i = 0; i < nr_iterations; i++)
- run_one_test();
+ rec_argc = ARRAY_SIZE(record_args) + argc - 1;
+ rec_argv = calloc(rec_argc + 1, sizeof(char *));
+
+ for (i = 0; i < ARRAY_SIZE(record_args); i++)
+ rec_argv[i] = strdup(record_args[i]);
+
+ for (j = 1; j < (unsigned int)argc; j++, i++)
+ rec_argv[i] = argv[j];
+
+ BUG_ON(i != rec_argc);
+
+ return cmd_record(i, rec_argv, NULL);
+}
+
+int cmd_sched(int argc, const char **argv, const char *prefix __used)
+{
+ symbol__init(0);
+
+ argc = parse_options(argc, argv, sched_options, sched_usage,
+ PARSE_OPT_STOP_AT_NON_OPTION);
+ if (!argc)
+ usage_with_options(sched_usage, sched_options);
+
+ if (!strncmp(argv[0], "rec", 3)) {
+ return __cmd_record(argc, argv);
+ } else if (!strncmp(argv[0], "lat", 3)) {
+ trace_handler = &lat_ops;
+ if (argc > 1) {
+ argc = parse_options(argc, argv, latency_options, latency_usage, 0);
+ if (argc)
+ usage_with_options(latency_usage, latency_options);
+ }
+ setup_sorting();
+ __cmd_lat();
+ } else if (!strcmp(argv[0], "map")) {
+ trace_handler = &map_ops;
+ setup_sorting();
+ __cmd_map();
+ } else if (!strncmp(argv[0], "rep", 3)) {
+ trace_handler = &replay_ops;
+ if (argc) {
+ argc = parse_options(argc, argv, replay_options, replay_usage, 0);
+ if (argc)
+ usage_with_options(replay_usage, replay_options);
+ }
+ __cmd_replay();
+ } else if (!strcmp(argv[0], "trace")) {
+ /*
+ * Aliased to 'perf trace' for now:
+ */
+ return cmd_trace(argc, argv, prefix);
+ } else {
+ usage_with_options(sched_usage, sched_options);
+ }
return 0;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff