mirror of
https://github.com/adulau/aha.git
synced 2024-12-28 11:46:19 +00:00
perf sched: Add 'perf sched map' scheduling event map printout
This prints a textual context-switching outline of workload
captured via perf sched record.
For example, on a 16 CPU box it outputs:
N1 O1 . . . S1 . . . B0 . *I0 C1 . M1 . 23002.773423 secs
N1 O1 . *Q0 . S1 . . . B0 . I0 C1 . M1 . 23002.773423 secs
N1 O1 . Q0 . S1 . . . B0 . *R1 C1 . M1 . 23002.773485 secs
N1 O1 . Q0 . S1 . *S0 . B0 . R1 C1 . M1 . 23002.773478 secs
*L0 O1 . Q0 . S1 . S0 . B0 . R1 C1 . M1 . 23002.773523 secs
L0 O1 . *. . S1 . S0 . B0 . R1 C1 . M1 . 23002.773531 secs
L0 O1 . . . S1 . S0 . B0 . R1 C1 *T1 M1 . 23002.773547 secs T1 => irqbalance:2089
L0 O1 . . . S1 . S0 . *P0 . R1 C1 T1 M1 . 23002.773549 secs
*N1 O1 . . . S1 . S0 . P0 . R1 C1 T1 M1 . 23002.773566 secs
N1 O1 . . . *J0 . S0 . P0 . R1 C1 T1 M1 . 23002.773571 secs
N1 O1 . . . J0 . S0 *B0 P0 . R1 C1 T1 M1 . 23002.773592 secs
N1 O1 . . . J0 . *U0 B0 P0 . R1 C1 T1 M1 . 23002.773582 secs
N1 O1 . . . *S1 . U0 B0 P0 . R1 C1 T1 M1 . 23002.773604 secs
N1 O1 . . . S1 . U0 B0 *. . R1 C1 T1 M1 . 23002.773615 secs
N1 O1 . . . S1 . U0 B0 . . *K0 C1 T1 M1 . 23002.773631 secs
N1 O1 . *M0 . S1 . U0 B0 . . K0 C1 T1 M1 . 23002.773624 secs
N1 O1 . M0 . S1 . U0 *. . . K0 C1 T1 M1 . 23002.773644 secs
N1 O1 . M0 . S1 . U0 . . . *R1 C1 T1 M1 . 23002.773662 secs
N1 O1 . M0 . S1 . *. . . . R1 C1 T1 M1 . 23002.773648 secs
N1 O1 . *. . S1 . . . . . R1 C1 T1 M1 . 23002.773680 secs
N1 O1 . . . *L0 . . . . . R1 C1 T1 M1 . 23002.773717 secs
*N0 O1 . . . L0 . . . . . R1 C1 T1 M1 . 23002.773709 secs
*N1 O1 . . . L0 . . . . . R1 C1 T1 M1 . 23002.773747 secs
Columns stand for individual CPUs, from CPU0 to CPU15, and the
two-letter shortcuts stand for tasks that are running on a CPU.
'*' denotes the CPU that had the event.
A dot signals an idle CPU.
New tasks are assigned new two-letter shortcuts - when they occur
first they are printed. In the above example 'T1' stood for irqbalance:
T1 => irqbalance:2089
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar
parent
80ed0987f3
commit
0ec04e16d0
3 changed files with 214 additions and 101 deletions
|
|
@ -159,8 +159,6 @@ 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)
|
||||
{
|
||||
|
|
@ -634,38 +632,6 @@ static void test_calibrations(void)
|
|||
printf("the sleep test took %Ld nsecs\n", T1-T0);
|
||||
}
|
||||
|
||||
static void __cmd_replay(void)
|
||||
{
|
||||
unsigned long i;
|
||||
|
||||
calibrate_run_measurement_overhead();
|
||||
calibrate_sleep_measurement_overhead();
|
||||
|
||||
test_calibrations();
|
||||
|
||||
read_events();
|
||||
|
||||
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 (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);
|
||||
|
||||
print_task_traces();
|
||||
add_cross_task_wakeups();
|
||||
|
||||
create_tasks();
|
||||
printf("------------------------------------------------------------\n");
|
||||
for (i = 0; i < replay_repeat; i++)
|
||||
run_one_test();
|
||||
}
|
||||
|
||||
static int
|
||||
process_comm_event(event_t *event, unsigned long offset, unsigned long head)
|
||||
{
|
||||
|
|
@ -1354,64 +1320,6 @@ static void sort_lat(void)
|
|||
}
|
||||
}
|
||||
|
||||
static void __cmd_lat(void)
|
||||
{
|
||||
struct rb_node *next;
|
||||
|
||||
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;
|
||||
|
||||
work_list = rb_entry(next, struct work_atoms, node);
|
||||
output_lat_thread(work_list);
|
||||
next = rb_next(next);
|
||||
}
|
||||
|
||||
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;
|
||||
|
||||
static void
|
||||
|
|
@ -1431,6 +1339,7 @@ process_sched_wakeup_event(struct raw_event_sample *raw,
|
|||
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);
|
||||
}
|
||||
|
||||
|
|
@ -1438,12 +1347,98 @@ process_sched_wakeup_event(struct raw_event_sample *raw,
|
|||
* 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 = 15;
|
||||
|
||||
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, &threads, &last_match);
|
||||
sched_in = threads__findnew(switch_event->next_pid, &threads, &last_match);
|
||||
|
||||
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 cpu,
|
||||
int this_cpu,
|
||||
u64 timestamp __used,
|
||||
struct thread *thread __used)
|
||||
{
|
||||
|
|
@ -1459,17 +1454,18 @@ process_sched_switch_event(struct raw_event_sample *raw,
|
|||
FILL_FIELD(switch_event, next_pid, event, raw->data);
|
||||
FILL_FIELD(switch_event, next_prio, event, raw->data);
|
||||
|
||||
if (curr_pid[cpu] != (u32)-1) {
|
||||
if (curr_pid[this_cpu] != (u32)-1) {
|
||||
/*
|
||||
* Are we trying to switch away a PID that is
|
||||
* not current?
|
||||
*/
|
||||
if (curr_pid[cpu] != switch_event.prev_pid)
|
||||
if (curr_pid[this_cpu] != switch_event.prev_pid)
|
||||
nr_context_switch_bugs++;
|
||||
}
|
||||
curr_pid[cpu] = switch_event.next_pid;
|
||||
if (trace_handler->switch_event)
|
||||
trace_handler->switch_event(&switch_event, event, this_cpu, timestamp, thread);
|
||||
|
||||
trace_handler->switch_event(&switch_event, event, cpu, timestamp, thread);
|
||||
curr_pid[this_cpu] = switch_event.next_pid;
|
||||
}
|
||||
|
||||
static void
|
||||
|
|
@ -1486,6 +1482,7 @@ process_sched_runtime_event(struct raw_event_sample *raw,
|
|||
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);
|
||||
}
|
||||
|
||||
|
|
@ -1505,6 +1502,7 @@ process_sched_fork_event(struct raw_event_sample *raw,
|
|||
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);
|
||||
}
|
||||
|
||||
|
|
@ -1748,6 +1746,116 @@ more:
|
|||
return rc;
|
||||
}
|
||||
|
||||
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);
|
||||
}
|
||||
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");
|
||||
}
|
||||
}
|
||||
|
||||
static void __cmd_lat(void)
|
||||
{
|
||||
struct rb_node *next;
|
||||
|
||||
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;
|
||||
|
||||
work_list = rb_entry(next, struct work_atoms, node);
|
||||
output_lat_thread(work_list);
|
||||
next = rb_next(next);
|
||||
}
|
||||
|
||||
printf(" -----------------------------------------------------------------------------------------\n");
|
||||
printf(" TOTAL: |%11.3f ms |%9Ld |\n",
|
||||
(double)all_runtime/1e6, all_count);
|
||||
|
||||
printf(" ---------------------------------------------------\n");
|
||||
|
||||
print_bad_events();
|
||||
printf("\n");
|
||||
|
||||
}
|
||||
|
||||
static struct trace_sched_handler map_ops = {
|
||||
.wakeup_event = NULL,
|
||||
.switch_event = map_switch_event,
|
||||
.runtime_event = NULL,
|
||||
.fork_event = NULL,
|
||||
};
|
||||
|
||||
static void __cmd_map(void)
|
||||
{
|
||||
setup_pager();
|
||||
read_events();
|
||||
print_bad_events();
|
||||
}
|
||||
|
||||
static void __cmd_replay(void)
|
||||
{
|
||||
unsigned long i;
|
||||
|
||||
calibrate_run_measurement_overhead();
|
||||
calibrate_sleep_measurement_overhead();
|
||||
|
||||
test_calibrations();
|
||||
|
||||
read_events();
|
||||
|
||||
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 (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);
|
||||
|
||||
print_task_traces();
|
||||
add_cross_task_wakeups();
|
||||
|
||||
create_tasks();
|
||||
printf("------------------------------------------------------------\n");
|
||||
for (i = 0; i < replay_repeat; i++)
|
||||
run_one_test();
|
||||
}
|
||||
|
||||
|
||||
static const char * const sched_usage[] = {
|
||||
"perf sched [<options>] {record|latency|replay|trace}",
|
||||
NULL
|
||||
|
|
@ -1867,6 +1975,10 @@ int cmd_sched(int argc, const char **argv, const char *prefix __used)
|
|||
}
|
||||
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) {
|
||||
|
|
|
|||
|
|
@ -8,7 +8,7 @@
|
|||
|
||||
static struct thread *thread__new(pid_t pid)
|
||||
{
|
||||
struct thread *self = malloc(sizeof(*self));
|
||||
struct thread *self = calloc(1, sizeof(*self));
|
||||
|
||||
if (self != NULL) {
|
||||
self->pid = pid;
|
||||
|
|
|
|||
|
|
@ -7,6 +7,7 @@ struct thread {
|
|||
struct rb_node rb_node;
|
||||
struct list_head maps;
|
||||
pid_t pid;
|
||||
char shortname[3];
|
||||
char *comm;
|
||||
};
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue