Add missing update for the documentation bit of some scheduler knob.
The knobs have been moved to /debug/sched/ location (with adjusted names).
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Reviewed-by: Alex Shi <alexs@kernel.org>
Tested-by: Yanteng Si <siyanteng@loongson.cn>
Link: https://lore.kernel.org/r/20220816121907.841-1-lukasz.luba@arm.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
way the previous scheduler had, and has no heuristics whatsoever. There is
only one central tunable (you have to switch on CONFIG_SCHED_DEBUG):
- /proc/sys/kernel/sched_min_granularity_ns
+ /sys/kernel/debug/sched/min_granularity_ns
which can be used to tune the scheduler from "desktop" (i.e., low latencies) to
"server" (i.e., good batching) workloads. It defaults to a setting suitable
CFS使用纳秒粒度的计时,不依赖于任何jiffies或HZ的细节。因此CFS并不像之前的调度器那样
有“时间片”的概念,也没有任何启发式的设计。唯一可调的参数(你需要打开CONFIG_SCHED_DEBUG)是:
- /proc/sys/kernel/sched_min_granularity_ns
+ /sys/kernel/debug/sched/min_granularity_ns
它可以用来将调度器从“桌面”模式(也就是低时延)调节为“服务器”(也就是高批处理)模式。
它的默认设置是适合桌面的工作负载。SCHED_BATCH也被CFS调度器模块处理。