sched(7) — Linux manual page - man7.org
网页These fields express values in nanoseconds. If sched_period is specified as 0, then it is made the same as sched_deadline. The kernel requires that: sched_runtime <= sched_deadline <= sched_period In addition, under the current implementation, all of the parameter values must be at least 1024 (i.e., just over one microsecond, which is the ...
Linux CFS调度器之虚拟时钟vruntime与调度延迟--Linux进程的管 …
网页__sched_period确定延迟周期的长度, 通常就是sysctl_sched_latency, 但如果有更多的进程在运行, 其值有可能按比例线性扩展. 在这种情况下, 周期长度是 __sched_period = sysctl_sched_latency * nr_running / sched_nr_latency
linux线程调度策略 - charlieroro - 博客园
网页2020年1月2日 · 如果调用 sched_setscheduler (2)， sched_setparam (2)， sched_setattr (2)， pthread_setschedparam (3)， pthread_setschedprio (3) (通过pid)修改了正在运行或可运行状态的 SCHED_FIFO 线程的优先级时，该线程在列表中的位置取决于优先级的变动：. 如果线程优先级增加了，它将会放置到新 ...
【原创】（五）Linux进程调度-CFS调度器 - LoyenWang - 博客园
网页2020年3月14日 · sched_period用于保证可运行任务都能至少运行一次的时间间隔； 当可运行任务大于8个的时候，sched_period的计算则需要根据任务个数乘以最小调度颗粒值，这个值系统默认为0.75ms；
2.6.2.3 调度逻辑 - 调度周期 | Linux核心概念详解
网页所以 CFS 没有使用固定的时间长度作为调度周期，而是根据当前队列中的任务数量动态计算出调度周期的长度，该逻辑由函数 __sched_period 实现：. 当队列中所有的任务超过8个时，CFS的调度周期为任务总数乘以0.75ms，否则调度周期为固定的6ms, 这样可以保证任务的 ...
Linux进程调度-CFS调度器原理分析及实现，懂了 - InfoQ 写作平台
网页sched_period 用于保证可运行任务都能至少运行一次的时间间隔；(2) 当可运行任务大于 8 个的时候，sched_period 的计算则需要根据任务个数乘以最小调度颗粒值，这个值系统默认为 0.75ms；(3) 每个任务的运行时间计算，是用 sched_period 值，去乘以该任务在整个 CFS …
Real-Time group scheduling — The Linux Kernel documentation
网页Any time not allocated to a real-time group will be used to run normal priority tasks (SCHED_OTHER). Any allocated run time not used will also be picked up by SCHED_OTHER. Let’s consider an example: a frame fixed real-time renderer must deliver 25 frames a second, which yields a period of 0.04s per frame.
Deadline Task Scheduling — The Linux Kernel documentation
网页SCHED_DEADLINE [18] uses three parameters, named “runtime”, “period”, and “deadline”, to schedule tasks. A SCHED_DEADLINE task should receive “runtime” microseconds of execution time every “period” microseconds, and these “runtime” microseconds are available within “deadline” microseconds from the beginning of the ...
sched_setattr(2) — Linux manual page - man7.org
网页sched_period This field specifies the "Period" parameter for deadline scheduling. The value is expressed in nanoseconds.
chrt(1) — Linux manual page - man7.org
网页The relation between the options required by the kernel is runtime ⇐ deadline ⇐ period. chrt copies period to deadline if --sched-deadline is not specified and deadline to runtime if --sched-runtime is not specified. It means that at least --sched-period has to be specified. See sched (7) for more details.
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