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authorSteven Rostedt <srostedt@redhat.com>2010-05-14 09:29:52 -0400
committerSteven Rostedt <rostedt@goodmis.org>2010-05-14 09:29:52 -0400
commit23e117fa44429cc054cb27d5621d64e4ced91e52 (patch)
treea4b9d0902b9c6f009b2c297515221c1b9bed3af8 /kernel/sched_features.h
parent668eb65f092902eb7dd526af73d4a7f025a94612 (diff)
parenta93d2f1744206827ccf416e2cdc5018aa503314e (diff)
Merge branch 'sched/core' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip into trace/tip/tracing/core-4
Diffstat (limited to 'kernel/sched_features.h')
-rw-r--r--kernel/sched_features.h55
1 files changed, 0 insertions, 55 deletions
diff --git a/kernel/sched_features.h b/kernel/sched_features.h
index d5059fd761d9..83c66e8ad3ee 100644
--- a/kernel/sched_features.h
+++ b/kernel/sched_features.h
@@ -1,11 +1,4 @@
1/* 1/*
2 * Disregards a certain amount of sleep time (sched_latency_ns) and
3 * considers the task to be running during that period. This gives it
4 * a service deficit on wakeup, allowing it to run sooner.
5 */
6SCHED_FEAT(FAIR_SLEEPERS, 1)
7
8/*
9 * Only give sleepers 50% of their service deficit. This allows 2 * Only give sleepers 50% of their service deficit. This allows
10 * them to run sooner, but does not allow tons of sleepers to 3 * them to run sooner, but does not allow tons of sleepers to
11 * rip the spread apart. 4 * rip the spread apart.
@@ -13,13 +6,6 @@ SCHED_FEAT(FAIR_SLEEPERS, 1)
13SCHED_FEAT(GENTLE_FAIR_SLEEPERS, 1) 6SCHED_FEAT(GENTLE_FAIR_SLEEPERS, 1)
14 7
15/* 8/*
16 * By not normalizing the sleep time, heavy tasks get an effective
17 * longer period, and lighter task an effective shorter period they
18 * are considered running.
19 */
20SCHED_FEAT(NORMALIZED_SLEEPER, 0)
21
22/*
23 * Place new tasks ahead so that they do not starve already running 9 * Place new tasks ahead so that they do not starve already running
24 * tasks 10 * tasks
25 */ 11 */
@@ -31,37 +17,6 @@ SCHED_FEAT(START_DEBIT, 1)
31SCHED_FEAT(WAKEUP_PREEMPT, 1) 17SCHED_FEAT(WAKEUP_PREEMPT, 1)
32 18
33/* 19/*
34 * Compute wakeup_gran based on task behaviour, clipped to
35 * [0, sched_wakeup_gran_ns]
36 */
37SCHED_FEAT(ADAPTIVE_GRAN, 1)
38
39/*
40 * When converting the wakeup granularity to virtual time, do it such
41 * that heavier tasks preempting a lighter task have an edge.
42 */
43SCHED_FEAT(ASYM_GRAN, 1)
44
45/*
46 * Always wakeup-preempt SYNC wakeups, see SYNC_WAKEUPS.
47 */
48SCHED_FEAT(WAKEUP_SYNC, 0)
49
50/*
51 * Wakeup preempt based on task behaviour. Tasks that do not overlap
52 * don't get preempted.
53 */
54SCHED_FEAT(WAKEUP_OVERLAP, 0)
55
56/*
57 * Use the SYNC wakeup hint, pipes and the likes use this to indicate
58 * the remote end is likely to consume the data we just wrote, and
59 * therefore has cache benefit from being placed on the same cpu, see
60 * also AFFINE_WAKEUPS.
61 */
62SCHED_FEAT(SYNC_WAKEUPS, 1)
63
64/*
65 * Based on load and program behaviour, see if it makes sense to place 20 * Based on load and program behaviour, see if it makes sense to place
66 * a newly woken task on the same cpu as the task that woke it -- 21 * a newly woken task on the same cpu as the task that woke it --
67 * improve cache locality. Typically used with SYNC wakeups as 22 * improve cache locality. Typically used with SYNC wakeups as
@@ -70,16 +25,6 @@ SCHED_FEAT(SYNC_WAKEUPS, 1)
70SCHED_FEAT(AFFINE_WAKEUPS, 1) 25SCHED_FEAT(AFFINE_WAKEUPS, 1)
71 26
72/* 27/*
73 * Weaken SYNC hint based on overlap
74 */
75SCHED_FEAT(SYNC_LESS, 1)
76
77/*
78 * Add SYNC hint based on overlap
79 */
80SCHED_FEAT(SYNC_MORE, 0)
81
82/*
83 * Prefer to schedule the task we woke last (assuming it failed 28 * Prefer to schedule the task we woke last (assuming it failed
84 * wakeup-preemption), since its likely going to consume data we 29 * wakeup-preemption), since its likely going to consume data we
85 * touched, increases cache locality. 30 * touched, increases cache locality.