Commit | Line | Data |
---|---|---|
51e0304c IM |
1 | /* |
2 | * Only give sleepers 50% of their service deficit. This allows | |
3 | * them to run sooner, but does not allow tons of sleepers to | |
4 | * rip the spread apart. | |
5 | */ | |
f8b6d1cc | 6 | SCHED_FEAT(GENTLE_FAIR_SLEEPERS, true) |
e26af0e8 | 7 | |
e26af0e8 PZ |
8 | /* |
9 | * Place new tasks ahead so that they do not starve already running | |
10 | * tasks | |
11 | */ | |
f8b6d1cc | 12 | SCHED_FEAT(START_DEBIT, true) |
e26af0e8 | 13 | |
e26af0e8 PZ |
14 | /* |
15 | * Prefer to schedule the task we woke last (assuming it failed | |
16 | * wakeup-preemption), since its likely going to consume data we | |
17 | * touched, increases cache locality. | |
18 | */ | |
f8b6d1cc | 19 | SCHED_FEAT(NEXT_BUDDY, false) |
e26af0e8 PZ |
20 | |
21 | /* | |
22 | * Prefer to schedule the task that ran last (when we did | |
23 | * wake-preempt) as that likely will touch the same data, increases | |
24 | * cache locality. | |
25 | */ | |
f8b6d1cc | 26 | SCHED_FEAT(LAST_BUDDY, true) |
e26af0e8 PZ |
27 | |
28 | /* | |
29 | * Consider buddies to be cache hot, decreases the likelyness of a | |
30 | * cache buddy being migrated away, increases cache locality. | |
31 | */ | |
f8b6d1cc | 32 | SCHED_FEAT(CACHE_HOT_BUDDY, true) |
e26af0e8 | 33 | |
8e6598af PZ |
34 | /* |
35 | * Use arch dependent cpu power functions | |
36 | */ | |
bc2a27cd | 37 | SCHED_FEAT(ARCH_POWER, true) |
8e6598af | 38 | |
f8b6d1cc PZ |
39 | SCHED_FEAT(HRTICK, false) |
40 | SCHED_FEAT(DOUBLE_TICK, false) | |
41 | SCHED_FEAT(LB_BIAS, true) | |
e26af0e8 PZ |
42 | |
43 | /* | |
44 | * Spin-wait on mutex acquisition when the mutex owner is running on | |
45 | * another cpu -- assumes that when the owner is running, it will soon | |
46 | * release the lock. Decreases scheduling overhead. | |
47 | */ | |
f8b6d1cc | 48 | SCHED_FEAT(OWNER_SPIN, true) |
aa483808 VP |
49 | |
50 | /* | |
095c0aa8 | 51 | * Decrement CPU power based on time not spent running tasks |
aa483808 | 52 | */ |
f8b6d1cc | 53 | SCHED_FEAT(NONTASK_POWER, true) |
317f3941 PZ |
54 | |
55 | /* | |
56 | * Queue remote wakeups on the target CPU and process them | |
57 | * using the scheduler IPI. Reduces rq->lock contention/bounces. | |
58 | */ | |
f8b6d1cc | 59 | SCHED_FEAT(TTWU_QUEUE, true) |
e3589f6c | 60 | |
f8b6d1cc PZ |
61 | SCHED_FEAT(FORCE_SD_OVERLAP, false) |
62 | SCHED_FEAT(RT_RUNTIME_SHARE, true) | |
eb95308e | 63 | SCHED_FEAT(LB_MIN, false) |
cbee9f88 PZ |
64 | |
65 | /* | |
66 | * Apply the automatic NUMA scheduling policy | |
67 | */ | |
68 | #ifdef CONFIG_NUMA_BALANCING | |
69 | SCHED_FEAT(NUMA, true) | |
70 | #endif |