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perf sched: Add involuntarily sleeping task in work atoms 

Currently in perf sched, we are measuring the scheduler wakeup
latencies.

Now we also want measure the time a task wait to be scheduled
after it gets preempted.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
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>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Frederic Weisbecker 2009-09-13 00:46:19 +02:00 committed by Ingo Molnar
parent 1756220530
commit c6ced61112
1 changed files with 13 additions and 6 deletions
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19
tools/perf/builtin-sched.c
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@ -866,8 +866,8 @@ static struct trace_sched_handler replay_ops = {
#define TASK_STATE_TO_CHAR_STR "RSDTtZX"
enum thread_state {
THREAD_SLEEPING,
THREAD_WAKED_UP,
THREAD_SLEEPING = 0,
THREAD_WAIT_CPU,
THREAD_SCHED_IN,
THREAD_IGNORE
};
@ -962,7 +962,9 @@ static char sched_out_state(struct trace_switch_event *switch_event)
static void
lat_sched_out(struct task_atoms *atoms,
struct trace_switch_event *switch_event __used, u64 delta)
struct trace_switch_event *switch_event __used,
u64 delta,
u64 timestamp)
{
struct work_atom *snapshot;
@ -970,6 +972,11 @@ lat_sched_out(struct task_atoms *atoms,
if (!snapshot)
die("Non memory");
if (sched_out_state(switch_event) == 'R') {
snapshot->state = THREAD_WAIT_CPU;
snapshot->wake_up_time = timestamp;
}
snapshot->runtime = delta;
list_add_tail(&snapshot->list, &atoms->snapshot_list);
}
@ -985,7 +992,7 @@ lat_sched_in(struct task_atoms *atoms, u64 timestamp)
snapshot = list_entry(atoms->snapshot_list.prev, struct work_atom,
list);
if (snapshot->state != THREAD_WAKED_UP)
if (snapshot->state != THREAD_WAIT_CPU)
return;
if (timestamp < snapshot->wake_up_time) {
@ -1043,7 +1050,7 @@ latency_switch_event(struct trace_switch_event *switch_event,
}
lat_sched_in(in_atoms, timestamp);
lat_sched_out(out_atoms, switch_event, delta);
lat_sched_out(out_atoms, switch_event, delta, timestamp);
}
static void
@ -1077,7 +1084,7 @@ latency_wakeup_event(struct trace_wakeup_event *wakeup_event,
if (snapshot->state != THREAD_SLEEPING)
return;
snapshot->state = THREAD_WAKED_UP;
snapshot->state = THREAD_WAIT_CPU;
snapshot->wake_up_time = timestamp;
}