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Tweaked CFS scheduler for lower latency. 7de2596b35ac1dbf55fb384f3d668a7315635c0b
- Scheduling latency: 6 -> 4 ms
- Minimal granularity: 0.75 -> 0.4 ms
- Wakeup granularity: 1 -> 0.5 ms
- CPU migration cost: 0.5 -> 0.25 ms
- Bandwidth slice size: 5 -> 3 ms
- Number of threads running: 8 -> 10
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Forced interrupt request threading by default. e9a38f81725b3024defed48f6f3efbbd622c2746
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Tweaked on-demand scheduler. 070b844e9e5485b8c14c85ae48747157893df148
- Samping down factor: 1 -> 5
MuQSS is not enabled by default. Can be enabled with CONFIG_SCHED_MUQSS variable.
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Disable yielding as it caused performance issues. ac994d428ce6eaa4c05a2b4a2083a32fcc55c682
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Reduced the cpu percentage that isochronous processes (SCHED_ISO) can use. ec2c919523eb93f34178b8df17d3351990d31907
- Isochronous processes allowed time: 70% -> 25%
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Round robin time reduced. 07224ba0c5d52ac05a08c28705f2578468e7a5be
- Round robin interval: 6 ms -> 2 ms
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Tweaked on-demand scheduler. 070b844e9e5485b8c14c85ae48747157893df148
- Samping down factor: 1 -> 5
- Frequency up threshold: 95 -> 45
- Micro frequency up threshold: 80 -> 40
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MuQSS tweeks documentation updated. add8f00727055356b90337313a23a3992e547d8d
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LZ4 compression algorithm for zswap instead of LZO. 90f3ec26286144951705914bec821254ce9e4b11
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zswap enabled by default. 7444df2ac4e2c4b47cfc5c6b1b64f54eb09e3800
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z3fold is now default compression allocator with stronger compression. 4eab5c9ea4fd3e6595b664a429869f4611fad7d4
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Transparent Huge Page defragmentation strategy to defer+madwise. 11c4c38b31dce0ff44972f495da537b3fbb0945f
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Unevictable memory not allowed to be compacted. 394ae0c10f1a73cc0b9a738e5e4c070076cc7727
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Writeback triggers at higher memory threshold. 598f06b26605fd12c5d955ef86ff3add25343efc
- Background writeback threshold: 10% -> 20%
- Sync writeback threshold: 20% -> 50%
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BFQ (budget fair queueing) as default scheduler for multiqueue block devices. 07b36ce250f292fc4590cbadb4c5797c54f528b5
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Increase block layer queue depth to 512. 9646e76dda2341d1cdd3796690a1f1861ebcb1bd- Reverted. 99a750246b733bf1f9178458c5b8193ad4626de0
- Virtual (SCSI) Host Bus Adapter (VHBA) driver added. Allows to emulate CD/DVD devices. ae2bd58fe11e9963d350cfd031da934231435e24
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Allowed O3 level of optimizations outside of ARC architecture. 8e4c45742cfca87c0cc44e7969ab8826be9139be
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Added ZEN_INTERACTIVE compile variable that enables the latency improvements. 827501ad72d510cb15ca96495b2233606b739f5e