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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2009-09-13 00:46:19 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-09-13 10:22:47 +0200 |
| commit | c6ced61112f1e6139914149fab65695801a74f0f (patch) | |
| tree | 7190da3cfee68b9a0fdcd39af84e78e31e054cb1 /tools/perf | |
| parent | 175622053069afbd366ba3c6030b5af82f378d40 (diff) | |
| download | linux-stable-c6ced61112f1e6139914149fab65695801a74f0f.tar.gz linux-stable-c6ced61112f1e6139914149fab65695801a74f0f.tar.bz2 linux-stable-c6ced61112f1e6139914149fab65695801a74f0f.zip | |
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>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/builtin-sched.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c index 7e57a986c056..61a80e8c9d0d 100644 --- a/tools/perf/builtin-sched.c +++ b/tools/perf/builtin-sched.c @@ -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; } |