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Diffstat (limited to 'tools/perf/builtin-sched.c')
-rw-r--r--tools/perf/builtin-sched.c212
1 files changed, 98 insertions, 114 deletions
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 26b782f26ee..7cca7c15b40 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -13,7 +13,6 @@
#include "util/debug.h"
#include "util/data_map.h"
-#include <sys/types.h>
#include <sys/prctl.h>
#include <semaphore.h>
@@ -141,6 +140,7 @@ struct work_atoms {
struct thread *thread;
struct rb_node node;
u64 max_lat;
+ u64 max_lat_at;
u64 total_lat;
u64 nb_atoms;
u64 total_runtime;
@@ -414,34 +414,33 @@ static u64 get_cpu_usage_nsec_parent(void)
return sum;
}
-static u64 get_cpu_usage_nsec_self(void)
+static int self_open_counters(void)
{
- char filename [] = "/proc/1234567890/sched";
- unsigned long msecs, nsecs;
- char *line = NULL;
- u64 total = 0;
- size_t len = 0;
- ssize_t chars;
- FILE *file;
- int ret;
+ struct perf_event_attr attr;
+ int fd;
- sprintf(filename, "/proc/%d/sched", getpid());
- file = fopen(filename, "r");
- BUG_ON(!file);
+ memset(&attr, 0, sizeof(attr));
- while ((chars = getline(&line, &len, file)) != -1) {
- ret = sscanf(line, "se.sum_exec_runtime : %ld.%06ld\n",
- &msecs, &nsecs);
- if (ret == 2) {
- total = msecs*1e6 + nsecs;
- break;
- }
- }
- if (line)
- free(line);
- fclose(file);
+ attr.type = PERF_TYPE_SOFTWARE;
+ attr.config = PERF_COUNT_SW_TASK_CLOCK;
+
+ fd = sys_perf_event_open(&attr, 0, -1, -1, 0);
- return total;
+ if (fd < 0)
+ die("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;
}
static void *thread_func(void *ctx)
@@ -450,9 +449,11 @@ static void *thread_func(void *ctx)
u64 cpu_usage_0, cpu_usage_1;
unsigned long i, ret;
char comm2[22];
+ int fd;
sprintf(comm2, ":%s", this_task->comm);
prctl(PR_SET_NAME, comm2);
+ fd = self_open_counters();
again:
ret = sem_post(&this_task->ready_for_work);
@@ -462,16 +463,15 @@ again:
ret = pthread_mutex_unlock(&start_work_mutex);
BUG_ON(ret);
- cpu_usage_0 = get_cpu_usage_nsec_self();
+ cpu_usage_0 = get_cpu_usage_nsec_self(fd);
for (i = 0; i < this_task->nr_events; i++) {
this_task->curr_event = i;
process_sched_event(this_task, this_task->atoms[i]);
}
- cpu_usage_1 = get_cpu_usage_nsec_self();
+ 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);
@@ -628,11 +628,6 @@ static void test_calibrations(void)
printf("the sleep test took %Ld nsecs\n", T1-T0);
}
-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)
@@ -1019,8 +1014,10 @@ add_sched_in_event(struct work_atoms *atoms, u64 timestamp)
delta = atom->sched_in_time - atom->wake_up_time;
atoms->total_lat += delta;
- if (delta > atoms->max_lat)
+ if (delta > atoms->max_lat) {
atoms->max_lat = delta;
+ atoms->max_lat_at = timestamp;
+ }
atoms->nb_atoms++;
}
@@ -1216,10 +1213,11 @@ static void output_lat_thread(struct work_atoms *work_list)
avg = work_list->total_lat / work_list->nb_atoms;
- printf("|%11.3f ms |%9llu | avg:%9.3f ms | max:%9.3f ms |\n",
+ printf("|%11.3f ms |%9llu | 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 / 1e6,
+ (double)work_list->max_lat_at / 1e9);
}
static int pid_cmp(struct work_atoms *l, struct work_atoms *r)
@@ -1356,7 +1354,7 @@ static void sort_lat(void)
static struct trace_sched_handler *trace_handler;
static void
-process_sched_wakeup_event(struct raw_event_sample *raw,
+process_sched_wakeup_event(void *data,
struct event *event,
int cpu __used,
u64 timestamp __used,
@@ -1364,13 +1362,13 @@ process_sched_wakeup_event(struct raw_event_sample *raw,
{
struct trace_wakeup_event wakeup_event;
- FILL_COMMON_FIELDS(wakeup_event, event, raw->data);
+ FILL_COMMON_FIELDS(wakeup_event, event, 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);
+ FILL_ARRAY(wakeup_event, comm, event, data);
+ FILL_FIELD(wakeup_event, pid, event, data);
+ FILL_FIELD(wakeup_event, prio, event, data);
+ FILL_FIELD(wakeup_event, success, event, data);
+ FILL_FIELD(wakeup_event, cpu, event, data);
if (trace_handler->wakeup_event)
trace_handler->wakeup_event(&wakeup_event, event, cpu, timestamp, thread);
@@ -1469,7 +1467,7 @@ map_switch_event(struct trace_switch_event *switch_event,
static void
-process_sched_switch_event(struct raw_event_sample *raw,
+process_sched_switch_event(void *data,
struct event *event,
int this_cpu,
u64 timestamp __used,
@@ -1477,15 +1475,15 @@ process_sched_switch_event(struct raw_event_sample *raw,
{
struct trace_switch_event switch_event;
- FILL_COMMON_FIELDS(switch_event, event, raw->data);
+ FILL_COMMON_FIELDS(switch_event, event, 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);
+ FILL_ARRAY(switch_event, prev_comm, event, data);
+ FILL_FIELD(switch_event, prev_pid, event, data);
+ FILL_FIELD(switch_event, prev_prio, event, data);
+ FILL_FIELD(switch_event, prev_state, event, data);
+ FILL_ARRAY(switch_event, next_comm, event, data);
+ FILL_FIELD(switch_event, next_pid, event, data);
+ FILL_FIELD(switch_event, next_prio, event, data);
if (curr_pid[this_cpu] != (u32)-1) {
/*
@@ -1502,7 +1500,7 @@ process_sched_switch_event(struct raw_event_sample *raw,
}
static void
-process_sched_runtime_event(struct raw_event_sample *raw,
+process_sched_runtime_event(void *data,
struct event *event,
int cpu __used,
u64 timestamp __used,
@@ -1510,17 +1508,17 @@ process_sched_runtime_event(struct raw_event_sample *raw,
{
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);
+ FILL_ARRAY(runtime_event, comm, event, data);
+ FILL_FIELD(runtime_event, pid, event, data);
+ FILL_FIELD(runtime_event, runtime, event, data);
+ FILL_FIELD(runtime_event, vruntime, event, data);
if (trace_handler->runtime_event)
trace_handler->runtime_event(&runtime_event, event, cpu, timestamp, thread);
}
static void
-process_sched_fork_event(struct raw_event_sample *raw,
+process_sched_fork_event(void *data,
struct event *event,
int cpu __used,
u64 timestamp __used,
@@ -1528,12 +1526,12 @@ process_sched_fork_event(struct raw_event_sample *raw,
{
struct trace_fork_event fork_event;
- FILL_COMMON_FIELDS(fork_event, event, raw->data);
+ FILL_COMMON_FIELDS(fork_event, event, 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);
+ FILL_ARRAY(fork_event, parent_comm, event, data);
+ FILL_FIELD(fork_event, parent_pid, event, data);
+ FILL_ARRAY(fork_event, child_comm, event, data);
+ FILL_FIELD(fork_event, child_pid, event, data);
if (trace_handler->fork_event)
trace_handler->fork_event(&fork_event, event, cpu, timestamp, thread);
@@ -1550,7 +1548,7 @@ process_sched_exit_event(struct event *event,
}
static void
-process_sched_migrate_task_event(struct raw_event_sample *raw,
+process_sched_migrate_task_event(void *data,
struct event *event,
int cpu __used,
u64 timestamp __used,
@@ -1558,80 +1556,66 @@ process_sched_migrate_task_event(struct raw_event_sample *raw,
{
struct trace_migrate_task_event migrate_task_event;
- FILL_COMMON_FIELDS(migrate_task_event, event, raw->data);
+ FILL_COMMON_FIELDS(migrate_task_event, event, 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);
+ FILL_ARRAY(migrate_task_event, comm, event, data);
+ FILL_FIELD(migrate_task_event, pid, event, data);
+ FILL_FIELD(migrate_task_event, prio, event, data);
+ FILL_FIELD(migrate_task_event, cpu, event, 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,
+process_raw_event(event_t *raw_event __used, void *data,
int cpu, u64 timestamp, struct thread *thread)
{
- struct raw_event_sample *raw = more_data;
struct event *event;
int type;
- type = trace_parse_common_type(raw->data);
+
+ type = trace_parse_common_type(data);
event = trace_find_event(type);
if (!strcmp(event->name, "sched_switch"))
- process_sched_switch_event(raw, event, cpu, timestamp, thread);
+ process_sched_switch_event(data, event, cpu, timestamp, thread);
if (!strcmp(event->name, "sched_stat_runtime"))
- process_sched_runtime_event(raw, event, cpu, timestamp, thread);
+ process_sched_runtime_event(data, event, cpu, timestamp, thread);
if (!strcmp(event->name, "sched_wakeup"))
- process_sched_wakeup_event(raw, event, cpu, timestamp, thread);
+ process_sched_wakeup_event(data, event, cpu, timestamp, thread);
if (!strcmp(event->name, "sched_wakeup_new"))
- process_sched_wakeup_event(raw, event, cpu, timestamp, thread);
+ process_sched_wakeup_event(data, event, cpu, timestamp, thread);
if (!strcmp(event->name, "sched_process_fork"))
- process_sched_fork_event(raw, event, cpu, timestamp, thread);
+ process_sched_fork_event(data, 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);
+ process_sched_migrate_task_event(data, event, cpu, timestamp, thread);
}
static int process_sample_event(event_t *event)
{
+ struct sample_data data;
struct thread *thread;
- u64 ip = event->ip.ip;
- u64 timestamp = -1;
- u32 cpu = -1;
- u64 period = 1;
- void *more_data = event->ip.__more_data;
if (!(sample_type & PERF_SAMPLE_RAW))
return 0;
- thread = threads__findnew(event->ip.pid);
+ memset(&data, 0, sizeof(data));
+ data.time = -1;
+ data.cpu = -1;
+ data.period = -1;
- if (sample_type & PERF_SAMPLE_TIME) {
- timestamp = *(u64 *)more_data;
- more_data += sizeof(u64);
- }
-
- if (sample_type & PERF_SAMPLE_CPU) {
- cpu = *(u32 *)more_data;
- more_data += sizeof(u32);
- more_data += sizeof(u32); /* reserved */
- }
-
- if (sample_type & PERF_SAMPLE_PERIOD) {
- period = *(u64 *)more_data;
- more_data += sizeof(u64);
- }
+ event__parse_sample(event, sample_type, &data);
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);
+ data.pid, data.tid,
+ (void *)(long)data.ip,
+ (long long)data.period);
+ thread = threads__findnew(data.pid);
if (thread == NULL) {
pr_debug("problem processing %d event, skipping it.\n",
event->header.type);
@@ -1640,10 +1624,10 @@ static int process_sample_event(event_t *event)
dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
- if (profile_cpu != -1 && profile_cpu != (int) cpu)
+ if (profile_cpu != -1 && profile_cpu != (int)data.cpu)
return 0;
- process_raw_event(event, more_data, cpu, timestamp, thread);
+ process_raw_event(event, data.raw_data, data.cpu, data.time, thread);
return 0;
}
@@ -1724,9 +1708,9 @@ static void __cmd_lat(void)
read_events();
sort_lat();
- printf("\n -----------------------------------------------------------------------------------------\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 | Maximum delay at |\n");
+ printf(" ---------------------------------------------------------------------------------------------------------------\n");
next = rb_first(&sorted_atom_root);
@@ -1902,13 +1886,18 @@ static int __cmd_record(int argc, const char **argv)
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);
+ /*
+ * Aliased to 'perf trace' for now:
+ */
+ if (!strcmp(argv[0], "trace"))
+ return cmd_trace(argc, argv, prefix);
+
+ symbol__init(0);
if (!strncmp(argv[0], "rec", 3)) {
return __cmd_record(argc, argv);
} else if (!strncmp(argv[0], "lat", 3)) {
@@ -1932,11 +1921,6 @@ int cmd_sched(int argc, const char **argv, const char *prefix __used)
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);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-17 18:37:03 +0000