函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\sched\fair.c Create Date:2022-07-27 10:38:52
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：update_stats_enqueue_sleeper

函数原型：static inline void update_stats_enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se)

返回类型：void

参数：

类型参数名称
struct cfs_rq *cfs_rq
struct sched_entity *se
925  struct task_struct * tsk = NULL
928  如果非schedstat_enabled()则返回
931  sleep_start等于schedstat_val(sleep_start)
932  block_start等于schedstat_val(block_start)
934  如果entity_is_task(se)则tsk等于CFS operations on generic schedulable entities:
937  如果sleep_start则
938  delta等于rq_clock(rq_of(cfs_rq))减sleep_start
940  如果delta小于0则delta等于0
943  如果此条件成立可能性小(为编译器优化)(delta > schedstat_val(sleep_max))则__schedstat_set(sleep_max, delta)
946  __schedstat_set(sleep_start, 0)
947  __schedstat_add(sum_sleep_runtime, delta)
949  如果tsk则
950  account_scheduler_latency(tsk, delta >> 10, 1)
951  Tracepoint for accounting sleep time (time the task is not runnable,* including iowait, see below).
954  如果block_start则
955  delta等于rq_clock(rq_of(cfs_rq))减block_start
957  如果delta小于0则delta等于0
960  如果此条件成立可能性小(为编译器优化)(delta > schedstat_val(block_max))则__schedstat_set(block_max, delta)
963  __schedstat_set(block_start, 0)
964  __schedstat_add(sum_sleep_runtime, delta)
966  如果tsk则
967  如果in_iowait则
973  Tracepoint for accounting blocked time (time the task is in uninterruptible).
980  如果此条件成立可能性小(为编译器优化)(prof_on == SLEEP_PROFILING)则
985  account_scheduler_latency(tsk, delta >> 10, 0)
调用者
名称描述
update_stats_enqueueTask is being enqueued - update stats: