On Linux, system load is defined as the exponentially decaying average of num runnable processes + num uninterruptable processes. I am wondering if it will correctly account for CFS cgroup quota used to limit the number of cpu shares a group of processes may use in a given interval. In other word: If a process is throttled due to depleted
Tag: cfs
Completely Fair Scheduler (CFS): vruntime of long running processes
If vruntime is counted since creation of a process how come such a process even gets a processor if it is competing with a newly created processor-bound process which is younger let say by days? As I’ve read the rule is simple: pick the leftmost leaf which is a process with the lowest runtime. Thanks! Answer The kernel documentation for
Linux SCHED_OTHER, SCHED_FIFO and SCHED_RR – differences
Can someone explain the differences between SCHED_OTHER, SCHED_FIFO and SCHED_RR? Thanks Answer SCHED_FIFO and SCHED_RR are so called “real-time” policies. They implement the fixed-priority real-time scheduling specified by the POSIX standard. Tasks with these policies preempt every other task, which can thus easily go into starvation (if they don’t release the CPU). The difference between SCHED_FIFO and SCHED_RR is that