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| author | Ingo Molnar <mingo@elte.hu> | 2010-05-20 08:38:55 -0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-05-20 08:38:55 -0400 |
| commit | dfacc4d6c98b89609250269f518c1f54c30454ef (patch) | |
| tree | e7effbee7bdc85d18f7b26ab9cb5c9f700d1481a /kernel/sched_features.h | |
| parent | f869097e884d8cb65b2bb7831ca57b7dffb66fdd (diff) | |
| parent | 85cb68b27c428d477169f3aa46c72dba103a17bd (diff) | |
Merge branch 'perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into perf/core
Diffstat (limited to 'kernel/sched_features.h')
| -rw-r--r-- | kernel/sched_features.h | 55 |
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 | */ | ||
| 6 | SCHED_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) | |||
| 13 | SCHED_FEAT(GENTLE_FAIR_SLEEPERS, 1) | 6 | SCHED_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 | */ | ||
| 20 | SCHED_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) | |||
| 31 | SCHED_FEAT(WAKEUP_PREEMPT, 1) | 17 | SCHED_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 | */ | ||
| 37 | SCHED_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 | */ | ||
| 43 | SCHED_FEAT(ASYM_GRAN, 1) | ||
| 44 | |||
| 45 | /* | ||
| 46 | * Always wakeup-preempt SYNC wakeups, see SYNC_WAKEUPS. | ||
| 47 | */ | ||
| 48 | SCHED_FEAT(WAKEUP_SYNC, 0) | ||
| 49 | |||
| 50 | /* | ||
| 51 | * Wakeup preempt based on task behaviour. Tasks that do not overlap | ||
| 52 | * don't get preempted. | ||
| 53 | */ | ||
| 54 | SCHED_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 | */ | ||
| 62 | SCHED_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) | |||
| 70 | SCHED_FEAT(AFFINE_WAKEUPS, 1) | 25 | SCHED_FEAT(AFFINE_WAKEUPS, 1) |
| 71 | 26 | ||
| 72 | /* | 27 | /* |
| 73 | * Weaken SYNC hint based on overlap | ||
| 74 | */ | ||
| 75 | SCHED_FEAT(SYNC_LESS, 1) | ||
| 76 | |||
| 77 | /* | ||
| 78 | * Add SYNC hint based on overlap | ||
| 79 | */ | ||
| 80 | SCHED_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. |
