#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/trace-event.h"
#include <sys/types.h>
+#include <sys/prctl.h>
-
-#define MAX_CPUS 4096
+#include <semaphore.h>
+#include <pthread.h>
+#include <math.h>
static char const *input_name = "perf.data";
static int input;
static struct perf_header *header;
static u64 sample_type;
-static int replay_mode;
-static int lat_mode;
+static char default_sort_order[] = "avg, max, switch, runtime";
+static char *sort_order = default_sort_order;
+#define PR_SET_NAME 15 /* Set process name */
+#define MAX_CPUS 4096
-/*
- * Scheduler benchmarks
- */
-#include <sys/resource.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/time.h>
-#include <sys/prctl.h>
+#define BUG_ON(x) assert(!(x))
-#include <linux/unistd.h>
+static u64 run_measurement_overhead;
+static u64 sleep_measurement_overhead;
-#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>
+#define COMM_LEN 20
+#define SYM_LEN 129
+
+#define MAX_PID 65536
+
+static unsigned long nr_tasks;
+
+struct sched_atom;
+
+struct task_desc {
+ unsigned long nr;
+ unsigned long pid;
+ char comm[COMM_LEN];
+
+ unsigned long nr_events;
+ unsigned long curr_event;
+ struct sched_atom **atoms;
+
+ pthread_t thread;
+ sem_t sleep_sem;
+
+ sem_t ready_for_work;
+ sem_t work_done_sem;
+
+ u64 cpu_usage;
+};
+
+enum sched_event_type {
+ SCHED_EVENT_RUN,
+ SCHED_EVENT_SLEEP,
+ SCHED_EVENT_WAKEUP,
+};
+
+struct sched_atom {
+ enum sched_event_type type;
+ u64 timestamp;
+ u64 duration;
+ unsigned long nr;
+ int specific_wait;
+ sem_t *wait_sem;
+ struct task_desc *wakee;
+};
+
+static struct task_desc *pid_to_task[MAX_PID];
+
+static struct task_desc **tasks;
+
+static pthread_mutex_t start_work_mutex = PTHREAD_MUTEX_INITIALIZER;
+static u64 start_time;
+
+static pthread_mutex_t work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER;
-#include <stdio.h>
+static unsigned long nr_run_events;
+static unsigned long nr_sleep_events;
+static unsigned long nr_wakeup_events;
-#define PR_SET_NAME 15 /* Set process name */
+static unsigned long nr_sleep_corrections;
+static unsigned long nr_run_events_optimized;
-#define BUG_ON(x) assert(!(x))
+static unsigned long targetless_wakeups;
+static unsigned long multitarget_wakeups;
-#define DEBUG 0
+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;
-typedef unsigned long long nsec_t;
+#define TASK_STATE_TO_CHAR_STR "RSDTtZX"
-static nsec_t run_measurement_overhead;
-static nsec_t sleep_measurement_overhead;
+enum thread_state {
+ THREAD_SLEEPING = 0,
+ THREAD_WAIT_CPU,
+ THREAD_SCHED_IN,
+ THREAD_IGNORE
+};
-static nsec_t get_nsecs(void)
+struct work_atom {
+ struct list_head list;
+ enum thread_state state;
+ u64 sched_out_time;
+ u64 wake_up_time;
+ u64 sched_in_time;
+ u64 runtime;
+};
+
+struct work_atoms {
+ struct list_head work_list;
+ struct thread *thread;
+ struct rb_node node;
+ u64 max_lat;
+ u64 total_lat;
+ u64 nb_atoms;
+ u64 total_runtime;
+};
+
+typedef int (*sort_fn_t)(struct work_atoms *, struct work_atoms *);
+
+static struct rb_root atom_root, sorted_atom_root;
+
+static u64 all_runtime;
+static u64 all_count;
+
+static int read_events(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++) {
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++) {
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 = calloc(1, 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;
}
static void
-add_sched_event_sleep(struct task_desc *task, nsec_t timestamp,
+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;
}
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;
+ delta = start_time + atom->timestamp - now;
- switch (event->type) {
+ switch (atom->type) {
case SCHED_EVENT_RUN:
- burn_nsecs(event->duration);
+ burn_nsecs(atom->duration);
break;
case SCHED_EVENT_SLEEP:
- 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:
- if (event->wait_sem)
- ret = sem_post(event->wait_sem);
+ if (atom->wait_sem)
+ ret = sem_post(atom->wait_sem);
BUG_ON(ret);
break;
default:
}
}
-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;
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];
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();
}
}
-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;
}
}
-static int read_events(void);
-
-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();
printf("#%-3ld: %0.3f, ",
nr_runs, (double)delta/1000000.0);
-#if 0
- printf("%0.2f +- %0.2f, ",
- (double)avg_delta/1e6, (double)std_dev/1e6);
-#endif
printf("ravg: %0.2f, ",
(double)run_avg/1e6);
static void test_calibrations(void)
{
- nsec_t T0, T1;
+ u64 T0, T1;
T0 = get_nsecs();
burn_nsecs(1e6);
static void __cmd_replay(void)
{
- long nr_iterations = 10, i;
+ unsigned long i;
calibrate_run_measurement_overhead();
calibrate_sleep_measurement_overhead();
if (multitarget_wakeups)
printf("multi-target wakeups: %ld\n", multitarget_wakeups);
if (nr_run_events_optimized)
- printf("run events optimized: %ld\n",
+ printf("run atoms optimized: %ld\n",
nr_run_events_optimized);
print_task_traces();
create_tasks();
printf("------------------------------------------------------------\n");
- for (i = 0; i < nr_iterations; i++)
+ for (i = 0; i < replay_repeat; i++)
run_one_test();
}
thread = threads__findnew(event->comm.pid, &threads, &last_match);
- dump_printf("%p [%p]: PERF_EVENT_COMM: %s:%d\n",
+ 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");
+ dump_printf("problem processing perf_event_comm, skipping event.\n");
return -1;
}
total_comm++;
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;
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,
add_sched_event_wakeup(waker, timestamp, wakee);
}
-static unsigned long cpu_last_switched[MAX_CPUS];
+static u64 cpu_last_switched[MAX_CPUS];
static void
replay_switch_event(struct trace_switch_event *switch_event,
.fork_event = replay_fork_event,
};
-#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 sort_dimension {
+ const char *name;
+ sort_fn_t cmp;
struct list_head list;
- enum thread_state state;
- u64 wake_up_time;
- u64 sched_in_time;
- u64 runtime;
};
-struct task_atoms {
- struct list_head snapshot_list;
- struct thread *thread;
- struct rb_node node;
-};
+static LIST_HEAD(cmp_pid);
-static struct rb_root lat_snapshot_root;
+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 task_atoms *
-thread_atom_list_search(struct rb_root *root, struct thread *thread)
+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 task_atoms *atoms;
+ struct work_atoms *atoms;
+ int cmp;
- atoms = container_of(node, struct task_atoms, node);
- if (thread->pid < atoms->thread->pid)
+ 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 (thread->pid > atoms->thread->pid)
+ else if (cmp < 0)
node = node->rb_right;
else {
+ BUG_ON(thread != atoms->thread);
return atoms;
}
}
}
static void
-__thread_latency_insert(struct rb_root *root, struct task_atoms *data)
+__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 task_atoms *this;
+ struct work_atoms *this;
+ int cmp;
- this = container_of(*new, struct task_atoms, node);
+ this = container_of(*new, struct work_atoms, node);
parent = *new;
- if (data->thread->pid < this->thread->pid)
+
+ cmp = thread_lat_cmp(sort_list, data, this);
+
+ if (cmp > 0)
new = &((*new)->rb_left);
- else if (data->thread->pid > this->thread->pid)
- new = &((*new)->rb_right);
else
- die("Double thread insertion\n");
+ new = &((*new)->rb_right);
}
rb_link_node(&data->node, parent, new);
rb_insert_color(&data->node, root);
}
-static void thread_atom_list_insert(struct thread *thread)
+static void thread_atoms_insert(struct thread *thread)
{
- struct task_atoms *atoms;
+ struct work_atoms *atoms;
+
atoms = calloc(sizeof(*atoms), 1);
if (!atoms)
die("No memory");
atoms->thread = thread;
- INIT_LIST_HEAD(&atoms->snapshot_list);
- __thread_latency_insert(&lat_snapshot_root, atoms);
+ INIT_LIST_HEAD(&atoms->work_list);
+ __thread_latency_insert(&atom_root, atoms, &cmp_pid);
}
static void
}
static void
-lat_sched_out(struct task_atoms *atoms,
- struct trace_switch_event *switch_event __used,
- u64 delta,
- u64 timestamp)
+add_sched_out_event(struct work_atoms *atoms,
+ char run_state,
+ u64 timestamp)
{
- struct work_atom *snapshot;
+ struct work_atom *atom;
- snapshot = calloc(sizeof(*snapshot), 1);
- if (!snapshot)
+ atom = calloc(sizeof(*atom), 1);
+ if (!atom)
die("Non memory");
- if (sched_out_state(switch_event) == 'R') {
- snapshot->state = THREAD_WAIT_CPU;
- snapshot->wake_up_time = timestamp;
+ atom->sched_out_time = timestamp;
+
+ if (run_state == 'R') {
+ atom->state = THREAD_WAIT_CPU;
+ atom->wake_up_time = atom->sched_out_time;
}
- snapshot->runtime = delta;
- list_add_tail(&snapshot->list, &atoms->snapshot_list);
+ 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
-lat_sched_in(struct task_atoms *atoms, u64 timestamp)
+add_sched_in_event(struct work_atoms *atoms, u64 timestamp)
{
- struct work_atom *snapshot;
+ struct work_atom *atom;
+ u64 delta;
- if (list_empty(&atoms->snapshot_list))
+ if (list_empty(&atoms->work_list))
return;
- snapshot = list_entry(atoms->snapshot_list.prev, struct work_atom,
- list);
+ atom = list_entry(atoms->work_list.prev, struct work_atom, list);
- if (snapshot->state != THREAD_WAIT_CPU)
+ if (atom->state != THREAD_WAIT_CPU)
return;
- if (timestamp < snapshot->wake_up_time) {
- snapshot->state = THREAD_IGNORE;
+ if (timestamp < atom->wake_up_time) {
+ atom->state = THREAD_IGNORE;
return;
}
- snapshot->state = THREAD_SCHED_IN;
- snapshot->sched_in_time = timestamp;
+ 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
u64 timestamp,
struct thread *thread __used)
{
- struct task_atoms *out_atoms, *in_atoms;
+ struct work_atoms *out_events, *in_events;
struct thread *sched_out, *sched_in;
u64 timestamp0;
s64 delta;
- if (cpu >= MAX_CPUS || cpu < 0)
- return;
+ BUG_ON(cpu >= MAX_CPUS || cpu < 0);
timestamp0 = cpu_last_switched[cpu];
cpu_last_switched[cpu] = timestamp;
sched_out = threads__findnew(switch_event->prev_pid, &threads, &last_match);
sched_in = threads__findnew(switch_event->next_pid, &threads, &last_match);
- in_atoms = thread_atom_list_search(&lat_snapshot_root, sched_in);
- if (!in_atoms) {
- thread_atom_list_insert(sched_in);
- in_atoms = thread_atom_list_search(&lat_snapshot_root, sched_in);
- if (!in_atoms)
- die("Internal latency tree error");
+ 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);
+}
- out_atoms = thread_atom_list_search(&lat_snapshot_root, sched_out);
- if (!out_atoms) {
- thread_atom_list_insert(sched_out);
- out_atoms = thread_atom_list_search(&lat_snapshot_root, sched_out);
- if (!out_atoms)
- die("Internal latency tree error");
+static void
+latency_runtime_event(struct trace_runtime_event *runtime_event,
+ struct event *event __used,
+ int cpu,
+ u64 timestamp,
+ struct thread *this_thread __used)
+{
+ struct work_atoms *atoms;
+ struct thread *thread;
+
+ BUG_ON(cpu >= MAX_CPUS || cpu < 0);
+
+ thread = threads__findnew(runtime_event->pid, &threads, &last_match);
+ atoms = thread_atoms_search(&atom_root, thread, &cmp_pid);
+ if (!atoms) {
+ thread_atoms_insert(thread);
+ atoms = thread_atoms_search(&atom_root, thread, &cmp_pid);
+ if (!atoms)
+ die("in-event: Internal tree error");
+ add_sched_out_event(atoms, 'R', timestamp);
}
- lat_sched_in(in_atoms, timestamp);
- lat_sched_out(out_atoms, switch_event, delta, timestamp);
+ add_runtime_event(atoms, runtime_event->runtime, timestamp);
}
static void
latency_wakeup_event(struct trace_wakeup_event *wakeup_event,
- struct event *event __used,
+ struct event *__event __used,
int cpu __used,
u64 timestamp,
struct thread *thread __used)
{
- struct task_atoms *atoms;
- struct work_atom *snapshot;
+ struct work_atoms *atoms;
+ struct work_atom *atom;
struct thread *wakee;
/* Note for later, it may be interesting to observe the failing cases */
return;
wakee = threads__findnew(wakeup_event->pid, &threads, &last_match);
- atoms = thread_atom_list_search(&lat_snapshot_root, wakee);
+ atoms = thread_atoms_search(&atom_root, wakee, &cmp_pid);
if (!atoms) {
- thread_atom_list_insert(wakee);
- return;
+ 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);
}
- if (list_empty(&atoms->snapshot_list))
- return;
+ BUG_ON(list_empty(&atoms->work_list));
+
+ atom = list_entry(atoms->work_list.prev, struct work_atom, list);
- snapshot = list_entry(atoms->snapshot_list.prev, struct work_atom,
- list);
+ if (atom->state != THREAD_SLEEPING)
+ nr_state_machine_bugs++;
- if (snapshot->state != THREAD_SLEEPING)
+ nr_timestamps++;
+ if (atom->sched_out_time > timestamp) {
+ nr_unordered_timestamps++;
return;
+ }
- snapshot->state = THREAD_WAIT_CPU;
- snapshot->wake_up_time = timestamp;
+ atom->state = THREAD_WAIT_CPU;
+ atom->wake_up_time = timestamp;
}
static struct trace_sched_handler lat_ops = {
.wakeup_event = latency_wakeup_event,
.switch_event = latency_switch_event,
+ .runtime_event = latency_runtime_event,
.fork_event = latency_fork_event,
};
-static u64 all_runtime;
-static u64 all_count;
-
-static void output_lat_thread(struct task_atoms *atom_list)
+static void output_lat_thread(struct work_atoms *work_list)
{
- struct work_atom *atom;
- int count = 0;
int i;
int ret;
- u64 max = 0, avg;
- u64 total = 0, delta;
- u64 total_runtime = 0;
+ u64 avg;
- list_for_each_entry(atom, &atom_list->snapshot_list, list) {
- total_runtime += atom->runtime;
+ if (!work_list->nb_atoms)
+ return;
+ /*
+ * Ignore idle threads:
+ */
+ if (!work_list->thread->pid)
+ return;
- if (atom->state != THREAD_SCHED_IN)
- continue;
+ all_runtime += work_list->total_runtime;
+ all_count += work_list->nb_atoms;
- count++;
+ ret = printf(" %s-%d ", work_list->thread->comm, work_list->thread->pid);
- delta = atom->sched_in_time - atom->wake_up_time;
- if (delta > max)
- max = delta;
- total += delta;
- }
+ for (i = 0; i < 24 - ret; i++)
+ printf(" ");
- all_runtime += total_runtime;
- all_count += count;
+ avg = work_list->total_lat / work_list->nb_atoms;
- if (!count)
- return;
+ 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);
+}
- ret = printf(" %s ", atom_list->thread->comm);
+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;
- for (i = 0; i < 19 - ret; i++)
- printf(" ");
+ 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;
- avg = total / count;
+ 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;
- printf("|%9.3f ms |%9d | avg:%9.3f ms | max:%9.3f ms |\n",
- (double)total_runtime/1e9, count, (double)avg/1e9, (double)max/1e9);
+ return 0;
+}
+
+static struct sort_dimension max_sort_dimension = {
+ .name = "max",
+ .cmp = max_cmp,
+};
+
+static int switch_cmp(struct work_atoms *l, struct work_atoms *r)
+{
+ if (l->nb_atoms < r->nb_atoms)
+ return -1;
+ if (l->nb_atoms > r->nb_atoms)
+ return 1;
+
+ return 0;
+}
+
+static struct sort_dimension switch_sort_dimension = {
+ .name = "switch",
+ .cmp = switch_cmp,
+};
+
+static int runtime_cmp(struct work_atoms *l, struct work_atoms *r)
+{
+ if (l->total_runtime < r->total_runtime)
+ return -1;
+ if (l->total_runtime > r->total_runtime)
+ return 1;
+
+ return 0;
+}
+
+static struct sort_dimension runtime_sort_dimension = {
+ .name = "runtime",
+ .cmp = runtime_cmp,
+};
+
+static struct sort_dimension *available_sorts[] = {
+ &pid_sort_dimension,
+ &avg_sort_dimension,
+ &max_sort_dimension,
+ &switch_sort_dimension,
+ &runtime_sort_dimension,
+};
+
+#define NB_AVAILABLE_SORTS (int)(sizeof(available_sorts) / sizeof(struct sort_dimension *))
+
+static LIST_HEAD(sort_list);
+
+static int sort_dimension__add(char *tok, struct list_head *list)
+{
+ int i;
+
+ for (i = 0; i < NB_AVAILABLE_SORTS; i++) {
+ if (!strcmp(available_sorts[i]->name, tok)) {
+ list_add_tail(&available_sorts[i]->list, list);
+
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
+static void setup_sorting(void);
+
+static void sort_lat(void)
+{
+ struct rb_node *node;
+
+ for (;;) {
+ struct work_atoms *data;
+ node = rb_first(&atom_root);
+ if (!node)
+ break;
+
+ rb_erase(node, &atom_root);
+ data = rb_entry(node, struct work_atoms, node);
+ __thread_latency_insert(&sorted_atom_root, data, &sort_list);
+ }
}
static void __cmd_lat(void)
setup_pager();
read_events();
+ sort_lat();
- printf("-----------------------------------------------------------------------------------\n");
- printf(" Task | Runtime ms | Switches | Average delay ms | Maximum delay ms |\n");
- printf("-----------------------------------------------------------------------------------\n");
+ printf("\n -----------------------------------------------------------------------------------------\n");
+ printf(" Task | Runtime ms | Switches | Average delay ms | Maximum delay ms |\n");
+ printf(" -----------------------------------------------------------------------------------------\n");
- next = rb_first(&lat_snapshot_root);
+ next = rb_first(&sorted_atom_root);
while (next) {
- struct task_atoms *atom_list;
+ struct work_atoms *work_list;
- atom_list = rb_entry(next, struct task_atoms, node);
- output_lat_thread(atom_list);
+ work_list = rb_entry(next, struct work_atoms, node);
+ output_lat_thread(work_list);
next = rb_next(next);
}
- printf("-----------------------------------------------------------------------------------\n");
- printf(" TOTAL: |%9.3f ms |%9Ld |\n",
- (double)all_runtime/1e9, all_count);
- printf("---------------------------------------------\n");
+ printf(" -----------------------------------------------------------------------------------------\n");
+ printf(" TOTAL: |%11.3f ms |%9Ld |\n",
+ (double)all_runtime/1e6, all_count);
+
+ printf(" ---------------------------------------------------\n");
+ 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);
+ } else {
+ }
+ if (nr_lost_events && nr_events) {
+ printf(" INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n",
+ (double)nr_lost_events/(double)nr_events*100.0,
+ nr_lost_events, nr_events, nr_lost_chunks);
+ }
+ if (nr_state_machine_bugs && nr_timestamps) {
+ printf(" INFO: %.3f%% state machine bugs (%ld out of %ld)",
+ (double)nr_state_machine_bugs/(double)nr_timestamps*100.0,
+ nr_state_machine_bugs, nr_timestamps);
+ if (nr_lost_events)
+ printf(" (due to lost events?)");
+ printf("\n");
+ }
+ if (nr_context_switch_bugs && nr_timestamps) {
+ printf(" INFO: %.3f%% context switch bugs (%ld out of %ld)",
+ (double)nr_context_switch_bugs/(double)nr_timestamps*100.0,
+ nr_context_switch_bugs, nr_timestamps);
+ if (nr_lost_events)
+ printf(" (due to lost events?)");
+ printf("\n");
+ }
+ printf("\n");
+
}
static struct trace_sched_handler *trace_handler;
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 u32 curr_pid[MAX_CPUS] = { [0 ... MAX_CPUS-1] = -1 };
+
static void
process_sched_switch_event(struct raw_event_sample *raw,
struct event *event,
- int cpu __used,
+ int cpu,
u64 timestamp __used,
struct thread *thread __used)
{
FILL_FIELD(switch_event, next_pid, event, raw->data);
FILL_FIELD(switch_event, next_prio, event, raw->data);
+ if (curr_pid[cpu] != (u32)-1) {
+ /*
+ * Are we trying to switch away a PID that is
+ * not current?
+ */
+ if (curr_pid[cpu] != switch_event.prev_pid)
+ nr_context_switch_bugs++;
+ }
+ curr_pid[cpu] = switch_event.next_pid;
+
trace_handler->switch_event(&switch_event, event, cpu, timestamp, thread);
}
static void
+process_sched_runtime_event(struct raw_event_sample *raw,
+ struct event *event,
+ int cpu __used,
+ u64 timestamp __used,
+ struct thread *thread __used)
+{
+ struct trace_runtime_event runtime_event;
+
+ FILL_ARRAY(runtime_event, comm, event, raw->data);
+ FILL_FIELD(runtime_event, pid, event, raw->data);
+ FILL_FIELD(runtime_event, runtime, event, raw->data);
+ FILL_FIELD(runtime_event, vruntime, event, raw->data);
+
+ trace_handler->runtime_event(&runtime_event, event, cpu, timestamp, thread);
+}
+
+static void
process_sched_fork_event(struct raw_event_sample *raw,
struct event *event,
int cpu __used,
if (!strcmp(event->name, "sched_switch"))
process_sched_switch_event(raw, event, cpu, timestamp, thread);
+ if (!strcmp(event->name, "sched_stat_runtime"))
+ process_sched_runtime_event(raw, event, cpu, timestamp, thread);
if (!strcmp(event->name, "sched_wakeup"))
process_sched_wakeup_event(raw, event, cpu, timestamp, thread);
if (!strcmp(event->name, "sched_wakeup_new"))
{
trace_event(event);
+ nr_events++;
switch (event->header.type) {
- case PERF_EVENT_MMAP ... PERF_EVENT_LOST:
+ case PERF_EVENT_MMAP:
+ return 0;
+ case PERF_EVENT_LOST:
+ nr_lost_chunks++;
+ nr_lost_events += event->lost.lost;
return 0;
case PERF_EVENT_COMM:
}
static const char * const sched_usage[] = {
- "perf sched [<options>] <command>",
+ "perf sched [<options>] {record|latency|replay|trace}",
NULL
};
-static const struct option options[] = {
+static const struct option sched_options[] = {
+ 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_BOOLEAN('r', "replay", &replay_mode,
- "replay sched behaviour from traces"),
- OPT_BOOLEAN('l', "latency", &lat_mode,
- "measure various latencies"),
+ OPT_END()
+};
+
+static const char * const latency_usage[] = {
+ "perf sched latency [<options>]",
+ NULL
+};
+
+static const struct option latency_options[] = {
+ OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
+ "sort by key(s): runtime, switch, avg, max"),
OPT_BOOLEAN('v', "verbose", &verbose,
"be more verbose (show symbol address, etc)"),
+ OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
+ "dump raw trace in ASCII"),
OPT_END()
};
+static const char * const replay_usage[] = {
+ "perf sched replay [<options>]",
+ NULL
+};
+
+static const struct option replay_options[] = {
+ OPT_INTEGER('r', "repeat", &replay_repeat,
+ "repeat the workload replay N times (-1: infinite)"),
+ OPT_BOOLEAN('v', "verbose", &verbose,
+ "be more verbose (show symbol address, etc)"),
+ OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
+ "dump raw trace in ASCII"),
+ OPT_END()
+};
+
+static void setup_sorting(void)
+{
+ char *tmp, *tok, *str = strdup(sort_order);
+
+ for (tok = strtok_r(str, ", ", &tmp);
+ tok; tok = strtok_r(NULL, ", ", &tmp)) {
+ if (sort_dimension__add(tok, &sort_list) < 0) {
+ error("Unknown --sort key: `%s'", tok);
+ usage_with_options(latency_usage, latency_options);
+ }
+ }
+
+ free(str);
+
+ sort_dimension__add((char *)"pid", &cmp_pid);
+}
+
+static const char *record_args[] = {
+ "record",
+ "-a",
+ "-R",
+ "-M",
+ "-f",
+ "-m", "1024",
+ "-c", "1",
+ "-e", "sched:sched_switch:r",
+ "-e", "sched:sched_stat_wait:r",
+ "-e", "sched:sched_stat_sleep:r",
+ "-e", "sched:sched_stat_iowait:r",
+ "-e", "sched:sched_stat_runtime:r",
+ "-e", "sched:sched_process_exit:r",
+ "-e", "sched:sched_process_fork:r",
+ "-e", "sched:sched_wakeup:r",
+ "-e", "sched:sched_migrate_task:r",
+};
+
+static int __cmd_record(int argc, const char **argv)
+{
+ unsigned int rec_argc, i, j;
+ const char **rec_argv;
+
+ rec_argc = ARRAY_SIZE(record_args) + argc - 1;
+ rec_argv = calloc(rec_argc + 1, sizeof(char *));
+
+ for (i = 0; i < ARRAY_SIZE(record_args); i++)
+ rec_argv[i] = strdup(record_args[i]);
+
+ for (j = 1; j < (unsigned int)argc; j++, i++)
+ rec_argv[i] = argv[j];
+
+ BUG_ON(i != rec_argc);
+
+ return cmd_record(i, rec_argv, NULL);
+}
+
int cmd_sched(int argc, const char **argv, const char *prefix __used)
{
symbol__init();
page_size = getpagesize();
- argc = parse_options(argc, argv, options, sched_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(sched_usage, options);
- }
+ 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 (replay_mode)
- trace_handler = &replay_ops;
- else if (lat_mode)
+ if (!strncmp(argv[0], "rec", 3)) {
+ return __cmd_record(argc, argv);
+ } else if (!strncmp(argv[0], "lat", 3)) {
trace_handler = &lat_ops;
- else
- usage_with_options(sched_usage, options);
-
- if (replay_mode)
- __cmd_replay();
- else if (lat_mode)
+ 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 (!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