Linux进程sched类的优先级顺序

1  调度器及默认优先级

linux-5.14.4includeasm-genericvmlinux.lds.h      126

/*
* The order of the sched class addresses are important, as they are
* used to determine the order of the priority of each sched class in
* relation to each other.
*/
#define SCHED_DATA

STRUCT_ALIGN();

__begin_sched_classes = .;

*(__idle_sched_class)

*(__fair_sched_class)

*(__rt_sched_class)

*(__dl_sched_class)

*(__stop_sched_class)

//
内核使用
__end_sched_classes = .;

2 每种调度器对应的调度策略

linux-5.14.4kernelschedsched.h        162

static inline int idle_policy(int policy)
{
return policy == SCHED_IDLE;
}
static inline int fair_policy(int policy)
{
return policy == SCHED_NORMAL || policy == SCHED_BATCH;
}
static inline int rt_policy(int policy)
{
return policy == SCHED_FIFO || policy == SCHED_RR;
}
static inline int dl_policy(int policy)
{
return policy == SCHED_DEADLINE;
}
static inline bool valid_policy(int policy)
{
return idle_policy(policy) || fair_policy(policy) ||
rt_policy(policy) || dl_policy(policy);
}

最后

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