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author | Ingo Molnar <mingo@elte.hu> | 2009-09-16 17:40:48 +0200 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2009-09-16 16:41:30 +0200 |
commit | 0ec04e16d08b69d8da46abbcfa3e3f2cd9738852 (patch) | |
tree | 8a63209fd4f45ff1c15a89fd0e3aa5dbdbe58b33 | |
parent | 80ed0987f363d7eb50193df3e6f6d71451f74bc3 (diff) | |
download | kernel_samsung_smdk4412-0ec04e16d08b69d8da46abbcfa3e3f2cd9738852.zip kernel_samsung_smdk4412-0ec04e16d08b69d8da46abbcfa3e3f2cd9738852.tar.gz kernel_samsung_smdk4412-0ec04e16d08b69d8da46abbcfa3e3f2cd9738852.tar.bz2 |
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>
-rw-r--r-- | tools/perf/builtin-sched.c | 312 | ||||
-rw-r--r-- | tools/perf/util/thread.c | 2 | ||||
-rw-r--r-- | tools/perf/util/thread.h | 1 |
3 files changed, 214 insertions, 101 deletions
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c index da8f674..f67e351 100644 --- a/tools/perf/builtin-sched.c +++ b/tools/perf/builtin-sched.c @@ -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 @@ -1431,19 +1339,106 @@ 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); - trace_handler->wakeup_event(&wakeup_event, event, cpu, timestamp, thread); + 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 = 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 @@ -1486,7 +1482,8 @@ 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); - trace_handler->runtime_event(&runtime_event, event, cpu, timestamp, thread); + if (trace_handler->runtime_event) + trace_handler->runtime_event(&runtime_event, event, cpu, timestamp, thread); } static void @@ -1505,7 +1502,8 @@ 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); - trace_handler->fork_event(&fork_event, event, cpu, timestamp, thread); + if (trace_handler->fork_event) + trace_handler->fork_event(&fork_event, event, cpu, timestamp, thread); } static void @@ -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) { diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c index 12c4341..45efb5d 100644 --- a/tools/perf/util/thread.c +++ b/tools/perf/util/thread.c @@ -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; diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h index 665d1f3..32aea3c 100644 --- a/tools/perf/util/thread.h +++ b/tools/perf/util/thread.h @@ -7,6 +7,7 @@ struct thread { struct rb_node rb_node; struct list_head maps; pid_t pid; + char shortname[3]; char *comm; }; |