mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 06:50:58 +07:00
perf sched: Don't read all tracepoint variables in advance
Do it just at the actual consumer of these fields, that way we avoid
needless lookups:
[root@sandy ~]# perf sched record sleep 30s
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 8.585 MB perf.data (~375063 samples) ]
Before:
[root@sandy ~]# perf stat -r 10 perf sched lat > /dev/null
Performance counter stats for 'perf sched lat' (10 runs):
103.592215 task-clock # 0.993 CPUs utilized ( +- 0.33% )
12 context-switches # 0.114 K/sec ( +- 3.29% )
0 cpu-migrations # 0.000 K/sec
7,605 page-faults # 0.073 M/sec ( +- 0.00% )
345,796,112 cycles # 3.338 GHz ( +- 0.07% ) [82.90%]
106,876,796 stalled-cycles-frontend # 30.91% frontend cycles idle ( +- 0.38% ) [83.23%]
62,060,877 stalled-cycles-backend # 17.95% backend cycles idle ( +- 0.80% ) [67.14%]
628,246,586 instructions # 1.82 insns per cycle
# 0.17 stalled cycles per insn ( +- 0.04% ) [83.64%]
134,962,057 branches # 1302.820 M/sec ( +- 0.10% ) [83.64%]
1,233,037 branch-misses # 0.91% of all branches ( +- 0.29% ) [83.41%]
0.104333272 seconds time elapsed ( +- 0.33% )
[root@sandy ~]# perf stat -r 10 perf sched lat > /dev/null
Performance counter stats for 'perf sched lat' (10 runs):
98.848272 task-clock # 0.993 CPUs utilized ( +- 0.48% )
11 context-switches # 0.112 K/sec ( +- 2.83% )
0 cpu-migrations # 0.003 K/sec ( +- 50.92% )
7,604 page-faults # 0.077 M/sec ( +- 0.00% )
332,216,085 cycles # 3.361 GHz ( +- 0.14% ) [82.87%]
100,623,710 stalled-cycles-frontend # 30.29% frontend cycles idle ( +- 0.53% ) [82.95%]
58,788,692 stalled-cycles-backend # 17.70% backend cycles idle ( +- 0.59% ) [67.15%]
609,402,433 instructions # 1.83 insns per cycle
# 0.17 stalled cycles per insn ( +- 0.04% ) [83.76%]
131,277,138 branches # 1328.067 M/sec ( +- 0.06% ) [83.77%]
1,117,871 branch-misses # 0.85% of all branches ( +- 0.32% ) [83.51%]
0.099580430 seconds time elapsed ( +- 0.48% )
[root@sandy ~]#
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-kracdpw8wqlr0xjh75uk8g11@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo
parent
2b7fcbc5a9
commit
9ec3f4e437
@ -97,73 +97,25 @@ struct work_atoms {
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typedef int (*sort_fn_t)(struct work_atoms *, struct work_atoms *);
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struct trace_switch_event {
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char *prev_comm;
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u32 prev_pid;
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u32 prev_prio;
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u64 prev_state;
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char *next_comm;
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u32 next_pid;
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u32 next_prio;
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};
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struct trace_runtime_event {
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char *comm;
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u32 pid;
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u64 runtime;
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u64 vruntime;
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};
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struct trace_wakeup_event {
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char *comm;
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u32 pid;
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u32 prio;
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u32 success;
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u32 cpu;
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};
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struct trace_fork_event {
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char *parent_comm;
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u32 parent_pid;
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char *child_comm;
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u32 child_pid;
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};
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struct trace_migrate_task_event {
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char *comm;
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u32 pid;
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u32 prio;
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u32 cpu;
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};
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struct perf_sched;
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struct trace_sched_handler {
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int (*switch_event)(struct perf_sched *sched,
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struct trace_switch_event *event,
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struct machine *machine,
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struct perf_evsel *evsel,
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struct perf_sample *sample);
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int (*switch_event)(struct perf_sched *sched, struct perf_evsel *evsel,
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struct perf_sample *sample, struct machine *machine);
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int (*runtime_event)(struct perf_sched *sched,
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struct trace_runtime_event *event,
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struct machine *machine,
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struct perf_sample *sample);
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int (*runtime_event)(struct perf_sched *sched, struct perf_evsel *evsel,
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struct perf_sample *sample, struct machine *machine);
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int (*wakeup_event)(struct perf_sched *sched,
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struct trace_wakeup_event *event,
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struct machine *machine,
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struct perf_evsel *evsel,
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struct perf_sample *sample);
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int (*wakeup_event)(struct perf_sched *sched, struct perf_evsel *evsel,
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struct perf_sample *sample, struct machine *machine);
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int (*fork_event)(struct perf_sched *sched,
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struct trace_fork_event *event,
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struct perf_evsel *evsel);
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int (*fork_event)(struct perf_sched *sched, struct perf_evsel *evsel,
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struct perf_sample *sample);
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int (*migrate_task_event)(struct perf_sched *sched,
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struct trace_migrate_task_event *event,
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struct machine *machine,
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struct perf_sample *sample);
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struct perf_evsel *evsel,
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struct perf_sample *sample,
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struct machine *machine);
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};
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struct perf_sched {
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@ -700,33 +652,36 @@ static void test_calibrations(struct perf_sched *sched)
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static int
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replay_wakeup_event(struct perf_sched *sched,
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struct trace_wakeup_event *wakeup_event,
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struct machine *machine __maybe_unused,
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struct perf_evsel *evsel, struct perf_sample *sample)
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struct perf_evsel *evsel, struct perf_sample *sample,
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struct machine *machine __maybe_unused)
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{
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const char *comm = perf_evsel__strval(evsel, sample, "comm");
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const u32 pid = perf_evsel__intval(evsel, sample, "pid");
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struct task_desc *waker, *wakee;
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if (verbose) {
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printf("sched_wakeup event %p\n", evsel);
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printf(" ... pid %d woke up %s/%d\n",
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sample->tid, wakeup_event->comm, wakeup_event->pid);
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printf(" ... pid %d woke up %s/%d\n", sample->tid, comm, pid);
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}
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waker = register_pid(sched, sample->tid, "<unknown>");
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wakee = register_pid(sched, wakeup_event->pid, wakeup_event->comm);
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wakee = register_pid(sched, pid, comm);
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add_sched_event_wakeup(sched, waker, sample->time, wakee);
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return 0;
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}
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static int
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replay_switch_event(struct perf_sched *sched,
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struct trace_switch_event *switch_event,
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struct machine *machine __maybe_unused,
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struct perf_evsel *evsel,
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struct perf_sample *sample)
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static int replay_switch_event(struct perf_sched *sched,
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struct perf_evsel *evsel,
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struct perf_sample *sample,
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struct machine *machine __maybe_unused)
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{
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const char *prev_comm = perf_evsel__strval(evsel, sample, "prev_comm"),
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*next_comm = perf_evsel__strval(evsel, sample, "next_comm");
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const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
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next_pid = perf_evsel__intval(evsel, sample, "next_pid");
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const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state");
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struct task_desc *prev, __maybe_unused *next;
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u64 timestamp0, timestamp = sample->time;
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int cpu = sample->cpu;
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@ -749,35 +704,36 @@ replay_switch_event(struct perf_sched *sched,
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return -1;
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}
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if (verbose) {
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printf(" ... switch from %s/%d to %s/%d [ran %" PRIu64 " nsecs]\n",
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switch_event->prev_comm, switch_event->prev_pid,
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switch_event->next_comm, switch_event->next_pid,
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delta);
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}
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pr_debug(" ... switch from %s/%d to %s/%d [ran %" PRIu64 " nsecs]\n",
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prev_comm, prev_pid, next_comm, next_pid, delta);
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prev = register_pid(sched, switch_event->prev_pid, switch_event->prev_comm);
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next = register_pid(sched, switch_event->next_pid, switch_event->next_comm);
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prev = register_pid(sched, prev_pid, prev_comm);
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next = register_pid(sched, next_pid, next_comm);
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sched->cpu_last_switched[cpu] = timestamp;
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add_sched_event_run(sched, prev, timestamp, delta);
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add_sched_event_sleep(sched, prev, timestamp, switch_event->prev_state);
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add_sched_event_sleep(sched, prev, timestamp, prev_state);
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return 0;
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}
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static int
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replay_fork_event(struct perf_sched *sched, struct trace_fork_event *fork_event,
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struct perf_evsel *evsel)
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static int replay_fork_event(struct perf_sched *sched, struct perf_evsel *evsel,
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struct perf_sample *sample)
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{
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const char *parent_comm = perf_evsel__strval(evsel, sample, "parent_comm"),
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*child_comm = perf_evsel__strval(evsel, sample, "child_comm");
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const u32 parent_pid = perf_evsel__intval(evsel, sample, "parent_pid"),
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child_pid = perf_evsel__intval(evsel, sample, "child_pid");
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if (verbose) {
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printf("sched_fork event %p\n", evsel);
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printf("... parent: %s/%d\n", fork_event->parent_comm, fork_event->parent_pid);
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printf("... child: %s/%d\n", fork_event->child_comm, fork_event->child_pid);
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printf("... parent: %s/%d\n", parent_comm, parent_pid);
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printf("... child: %s/%d\n", child_comm, child_pid);
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}
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register_pid(sched, fork_event->parent_pid, fork_event->parent_comm);
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register_pid(sched, fork_event->child_pid, fork_event->child_comm);
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register_pid(sched, parent_pid, parent_comm);
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register_pid(sched, child_pid, child_comm);
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return 0;
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}
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@ -870,18 +826,18 @@ static int thread_atoms_insert(struct perf_sched *sched, struct thread *thread)
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}
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static int latency_fork_event(struct perf_sched *sched __maybe_unused,
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struct trace_fork_event *fork_event __maybe_unused,
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struct perf_evsel *evsel __maybe_unused)
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struct perf_evsel *evsel __maybe_unused,
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struct perf_sample *sample __maybe_unused)
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{
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/* should insert the newcomer */
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return 0;
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}
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static char sched_out_state(struct trace_switch_event *switch_event)
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static char sched_out_state(u64 prev_state)
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{
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const char *str = TASK_STATE_TO_CHAR_STR;
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return str[switch_event->prev_state];
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return str[prev_state];
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}
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static int
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@ -951,13 +907,14 @@ add_sched_in_event(struct work_atoms *atoms, u64 timestamp)
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atoms->nb_atoms++;
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}
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static int
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latency_switch_event(struct perf_sched *sched,
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struct trace_switch_event *switch_event,
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struct machine *machine,
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struct perf_evsel *evsel __maybe_unused,
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struct perf_sample *sample)
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static int latency_switch_event(struct perf_sched *sched,
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struct perf_evsel *evsel,
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struct perf_sample *sample,
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struct machine *machine)
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{
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const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
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next_pid = perf_evsel__intval(evsel, sample, "next_pid");
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const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state");
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struct work_atoms *out_events, *in_events;
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struct thread *sched_out, *sched_in;
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u64 timestamp0, timestamp = sample->time;
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@ -978,8 +935,8 @@ latency_switch_event(struct perf_sched *sched,
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return -1;
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}
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sched_out = machine__findnew_thread(machine, switch_event->prev_pid);
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sched_in = machine__findnew_thread(machine, switch_event->next_pid);
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sched_out = machine__findnew_thread(machine, prev_pid);
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sched_in = machine__findnew_thread(machine, next_pid);
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out_events = thread_atoms_search(&sched->atom_root, sched_out, &sched->cmp_pid);
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if (!out_events) {
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@ -991,7 +948,7 @@ latency_switch_event(struct perf_sched *sched,
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return -1;
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}
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}
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if (add_sched_out_event(out_events, sched_out_state(switch_event), timestamp))
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if (add_sched_out_event(out_events, sched_out_state(prev_state), timestamp))
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return -1;
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in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid);
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@ -1015,12 +972,14 @@ latency_switch_event(struct perf_sched *sched,
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return 0;
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}
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static int
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latency_runtime_event(struct perf_sched *sched,
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struct trace_runtime_event *runtime_event,
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struct machine *machine, struct perf_sample *sample)
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static int latency_runtime_event(struct perf_sched *sched,
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struct perf_evsel *evsel,
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struct perf_sample *sample,
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struct machine *machine)
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{
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struct thread *thread = machine__findnew_thread(machine, runtime_event->pid);
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const u32 pid = perf_evsel__intval(evsel, sample, "pid");
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const u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
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struct thread *thread = machine__findnew_thread(machine, pid);
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struct work_atoms *atoms = thread_atoms_search(&sched->atom_root, thread, &sched->cmp_pid);
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u64 timestamp = sample->time;
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int cpu = sample->cpu;
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@ -1038,27 +997,27 @@ latency_runtime_event(struct perf_sched *sched,
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return -1;
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}
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add_runtime_event(atoms, runtime_event->runtime, timestamp);
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add_runtime_event(atoms, runtime, timestamp);
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return 0;
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}
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static int
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latency_wakeup_event(struct perf_sched *sched,
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struct trace_wakeup_event *wakeup_event,
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struct machine *machine,
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struct perf_evsel *evsel __maybe_unused,
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struct perf_sample *sample)
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static int latency_wakeup_event(struct perf_sched *sched,
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struct perf_evsel *evsel,
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struct perf_sample *sample,
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struct machine *machine)
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{
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const u32 pid = perf_evsel__intval(evsel, sample, "pid"),
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success = perf_evsel__intval(evsel, sample, "success");
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struct work_atoms *atoms;
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struct work_atom *atom;
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struct thread *wakee;
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u64 timestamp = sample->time;
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/* Note for later, it may be interesting to observe the failing cases */
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if (!wakeup_event->success)
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if (!success)
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return 0;
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wakee = machine__findnew_thread(machine, wakeup_event->pid);
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wakee = machine__findnew_thread(machine, pid);
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atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid);
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if (!atoms) {
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if (thread_atoms_insert(sched, wakee))
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@ -1095,11 +1054,12 @@ latency_wakeup_event(struct perf_sched *sched,
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return 0;
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}
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static int
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latency_migrate_task_event(struct perf_sched *sched,
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struct trace_migrate_task_event *migrate_task_event,
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struct machine *machine, struct perf_sample *sample)
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static int latency_migrate_task_event(struct perf_sched *sched,
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struct perf_evsel *evsel,
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struct perf_sample *sample,
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struct machine *machine)
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{
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const u32 pid = perf_evsel__intval(evsel, sample, "pid");
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u64 timestamp = sample->time;
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struct work_atoms *atoms;
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struct work_atom *atom;
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@ -1111,7 +1071,7 @@ latency_migrate_task_event(struct perf_sched *sched,
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if (sched->profile_cpu == -1)
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return 0;
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migrant = machine__findnew_thread(machine, migrate_task_event->pid);
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migrant = machine__findnew_thread(machine, pid);
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atoms = thread_atoms_search(&sched->atom_root, migrant, &sched->cmp_pid);
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if (!atoms) {
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if (thread_atoms_insert(sched, migrant))
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@ -1296,28 +1256,17 @@ static int process_sched_wakeup_event(struct perf_tool *tool,
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{
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struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
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if (sched->tp_handler->wakeup_event) {
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struct trace_wakeup_event event = {
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.comm = perf_evsel__strval(evsel, sample, "comm"),
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.pid = perf_evsel__intval(evsel, sample, "pid"),
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.prio = perf_evsel__intval(evsel, sample, "prio"),
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.success = perf_evsel__intval(evsel, sample, "success"),
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.cpu = perf_evsel__intval(evsel, sample, "cpu"),
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};
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return sched->tp_handler->wakeup_event(sched, &event, machine, evsel, sample);
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}
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if (sched->tp_handler->wakeup_event)
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return sched->tp_handler->wakeup_event(sched, evsel, sample, machine);
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return 0;
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}
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static int
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map_switch_event(struct perf_sched *sched,
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struct trace_switch_event *switch_event,
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struct machine *machine,
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struct perf_evsel *evsel __maybe_unused,
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struct perf_sample *sample)
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static int map_switch_event(struct perf_sched *sched, struct perf_evsel *evsel,
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struct perf_sample *sample, struct machine *machine)
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{
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const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
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next_pid = perf_evsel__intval(evsel, sample, "next_pid");
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struct thread *sched_out __maybe_unused, *sched_in;
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int new_shortname;
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u64 timestamp0, timestamp = sample->time;
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@ -1341,8 +1290,8 @@ map_switch_event(struct perf_sched *sched,
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return -1;
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}
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sched_out = machine__findnew_thread(machine, switch_event->prev_pid);
|
||||
sched_in = machine__findnew_thread(machine, switch_event->next_pid);
|
||||
sched_out = machine__findnew_thread(machine, prev_pid);
|
||||
sched_in = machine__findnew_thread(machine, next_pid);
|
||||
|
||||
sched->curr_thread[this_cpu] = sched_in;
|
||||
|
||||
@ -1411,19 +1360,8 @@ static int process_sched_switch_event(struct perf_tool *tool,
|
||||
sched->nr_context_switch_bugs++;
|
||||
}
|
||||
|
||||
if (sched->tp_handler->switch_event) {
|
||||
struct trace_switch_event event = {
|
||||
.prev_comm = perf_evsel__strval(evsel, sample, "prev_comm"),
|
||||
.prev_pid = prev_pid,
|
||||
.prev_prio = perf_evsel__intval(evsel, sample, "prev_prio"),
|
||||
.prev_state = perf_evsel__intval(evsel, sample, "prev_state"),
|
||||
.next_comm = perf_evsel__strval(evsel, sample, "next_comm"),
|
||||
.next_pid = next_pid,
|
||||
.next_prio = perf_evsel__intval(evsel, sample, "next_prio"),
|
||||
};
|
||||
|
||||
err = sched->tp_handler->switch_event(sched, &event, machine, evsel, sample);
|
||||
}
|
||||
if (sched->tp_handler->switch_event)
|
||||
err = sched->tp_handler->switch_event(sched, evsel, sample, machine);
|
||||
|
||||
sched->curr_pid[this_cpu] = next_pid;
|
||||
return err;
|
||||
@ -1436,15 +1374,8 @@ static int process_sched_runtime_event(struct perf_tool *tool,
|
||||
{
|
||||
struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
|
||||
|
||||
if (sched->tp_handler->runtime_event) {
|
||||
struct trace_runtime_event event = {
|
||||
.comm = perf_evsel__strval(evsel, sample, "comm"),
|
||||
.pid = perf_evsel__intval(evsel, sample, "pid"),
|
||||
.runtime = perf_evsel__intval(evsel, sample, "runtime"),
|
||||
.vruntime = perf_evsel__intval(evsel, sample, "vruntime"),
|
||||
};
|
||||
return sched->tp_handler->runtime_event(sched, &event, machine, sample);
|
||||
}
|
||||
if (sched->tp_handler->runtime_event)
|
||||
return sched->tp_handler->runtime_event(sched, evsel, sample, machine);
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1456,15 +1387,8 @@ static int process_sched_fork_event(struct perf_tool *tool,
|
||||
{
|
||||
struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
|
||||
|
||||
if (sched->tp_handler->fork_event) {
|
||||
struct trace_fork_event event = {
|
||||
.parent_comm = perf_evsel__strval(evsel, sample, "parent_comm"),
|
||||
.child_comm = perf_evsel__strval(evsel, sample, "child_comm"),
|
||||
.parent_pid = perf_evsel__intval(evsel, sample, "parent_pid"),
|
||||
.child_pid = perf_evsel__intval(evsel, sample, "child_pid"),
|
||||
};
|
||||
return sched->tp_handler->fork_event(sched, &event, evsel);
|
||||
}
|
||||
if (sched->tp_handler->fork_event)
|
||||
return sched->tp_handler->fork_event(sched, evsel, sample);
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -1485,15 +1409,8 @@ static int process_sched_migrate_task_event(struct perf_tool *tool,
|
||||
{
|
||||
struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
|
||||
|
||||
if (sched->tp_handler->migrate_task_event) {
|
||||
struct trace_migrate_task_event event = {
|
||||
.comm = perf_evsel__strval(evsel, sample, "comm"),
|
||||
.pid = perf_evsel__intval(evsel, sample, "pid"),
|
||||
.prio = perf_evsel__intval(evsel, sample, "prio"),
|
||||
.cpu = perf_evsel__intval(evsel, sample, "cpu"),
|
||||
};
|
||||
return sched->tp_handler->migrate_task_event(sched, &event, machine, sample);
|
||||
}
|
||||
if (sched->tp_handler->migrate_task_event)
|
||||
return sched->tp_handler->migrate_task_event(sched, evsel, sample, machine);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user