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UPDATE_CFS_RQ_LOAD_A(9) | Driver Basics | UPDATE_CFS_RQ_LOAD_A(9) |
NAME¶
update_cfs_rq_load_avg - update the cfs_rq's load/util averagesSYNOPSIS¶
int update_cfs_rq_load_avg(u64 now,
struct cfs_rq * cfs_rq,
bool update_freq);
ARGUMENTS¶
nowcurrent time, as per cfs_rq_clock_task
cfs_rq
cfs_rq to update
update_freq
should we call cfs_rq_util_change or will the call
do so
DESCRIPTION¶
The cfs_rq avg is the direct sum of all its entities (blocked and runnable) avg. The immediate corollary is that all (fair) tasks must be attached, see post_init_entity_util_avg. cfs_rq->avg is used for task_h_load and update_cfs_share for example. Returns true if the load decayed or we removed utilization. It is expected that one calls update_tg_load_avg on this condition, but after you've modified the cfs_rq avg (attach/detach), such that we propagate the new avg up.COPYRIGHT¶
January 2017 | Kernel Hackers Manual 4.8. |