blk_mq_init_queue:初始化IO请求队列--request_queue。函数的主要流程如下: 调用blk_alloc_queue_node分配请求队列的内存,分配的内存节点与设备连接的NUMA节点一致,避免远端内存访问问题。 调用blk_mq_init_allocated_queue初始化分配的请求队列(request_queue),blk-mq的request_queue中包含两层队列,即percpu的软件队...
blk_mq_init_queue:初始化IO请求队列--request_queue。函数的主要流程如下: 调用blk_alloc_queue_node分配请求队列的内存,分配的内存节点与设备连接的NUMA节点一致,避免远端内存访问问题。 调用blk_mq_init_allocated_queue初始化分配的请求队列(request_queue),blk-mq的request_queue中包含两层队列,即percpu的软件队...
Preemptive Multi-Queue Fair Queuingdoi:10.1145/3307681.3326605Yong ZhaoKun SuoXiaofeng WuJia RaoSong WuHai JinACMHigh Performance Distributed Computing
blk_mq_alloc_tag_set: 为一个或者多个请求队列分配tag和request集合(tag set可以是多个request queue共享的,例如UFS设备,一个host controller只有一个tag set,但器件可能划分成多个LU--Logical Unit,每个LU有单独的request queue, 这些不同的request queue共享一个tag set),主要流程如下: 设置硬件队列数量(nr_hw_...
q->make_request_fn函数在一开始在blk_queue_make_request函数中被注册为blk_mq_make_request函数或者blk_sq_make_request,其判断标准是当前块设备层支持多个hardware queue还是单个hardware queue。 为了说明该注册q->make_request_fn函数的过程,我们从队列初始化源头开始解释起: ...
and because request costs are unknown and have high variance. Using fair schedulers like WFQ and WF2Q in such settings leads to bursty schedules, where large requests block small ones for long periods of time. In this paper, we propose Two-Dimensional Fair Queuing (2DFQ), whic...
Fair queuing and scheduling across multiple users. Based on dominant resource fairness. Resource and job scheduling rate limits. Gang-scheduling, i.e., atomically scheduling sets of related jobs. Job preemption, both to run urgent jobs in a timely fashion and to balance resource allocation between...
In addition to what Edison said, I don’t believe you’ll need fair-queue on the physical interface if you’re queuing in your policy on the MLP interface. But you don’t need to shut your interface down to make these changes. HTH, John HTH, John *** Please rate all useful posts ...
The Multi-Process Service (MPS) is an alternative, binary-compatible implementation of the CUDA Application Programming Interface (API). The MPS runtime architecture is designed to transparently enable co-operative multi-process CUDA applications, typica
interface serial 3 no ip address encapsulation ppp no fair-queue ppp multilink ! interface GigabitEthernet 0/0/0 ip address 10.17.1.254 255.255.255.0 ! router rip network 10.0.0.0 ! end Router B Configuration hostname RouterB ! ! username RouterB password passwordA ip subnet...