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WARNING in distribute_cfs_runtime
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2023-09-08 10:44
【严重程度】 提示 【特性】 qos 【重现类型】 有条件概率复现 【定位分析】 CPU下线流程中会调用unthrottle_offline_cfs_rq()解除下线核上所有队列的带宽管控, 被解除管控的任务迁移到其它在线核上后可能被Qos_sched特性识别为离线任务并将其限流, 限流标志设为QOS_THROTTLED。 在Qos_sched特性打开的情况下,cfs_rq-> runtime_remaining = 1 并被qos限流是正常情况, Qos_sched不关注cfs_rq是否有剩余运行时间,只关注当前CPU上是否有在线任务,若有在线任务, 就会压制离线任务所在的cfs_rq,此种场景屏蔽该告警即可,不影响功能逻辑。 【影响评估及测试建议】 无 【对外部影响描述】 无
【严重程度】 提示 【特性】 qos 【重现类型】 有条件概率复现 【定位分析】 CPU下线流程中会调用unthrottle_offline_cfs_rq()解除下线核上所有队列的带宽管控, 被解除管控的任务迁移到其它在线核上后可能被Qos_sched特性识别为离线任务并将其限流, 限流标志设为QOS_THROTTLED。 在Qos_sched特性打开的情况下,cfs_rq-> runtime_remaining = 1 并被qos限流是正常情况, Qos_sched不关注cfs_rq是否有剩余运行时间,只关注当前CPU上是否有在线任务,若有在线任务, 就会压制离线任务所在的cfs_rq,此种场景屏蔽该告警即可,不影响功能逻辑。 【影响评估及测试建议】 无 【对外部影响描述】 无
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