This implementation is inspired from the Linux Kernel. Wait queues have similar semantics to condition variables, but don't require setting the condition + signaling to be atomic, hence no mutex is needed. In turn, one may safely call QUEUE_WAKE() from an ISR. Note, while cond_signal() ...
queue the context into hash table, release the lock got in 4) release the read_lock on mmap_sem   Eventually unqueue the context (but rarely, as this part  may be done by the futex_wake()) Futexes were designed to improve scalability but current implementation has various...
David, M.: A single-enqueuer wait-free queue implementation. In: Proceedings of DISC 2004. Lecture Notes in Computer Science, vol. 3274, pp. 132-143 (2004)M. David. A single-enqueuer wait-free queue implementation. In Proceedings of the 18th International Conference on Distributed Computing...
wait_for_completion puts the calling thread in the "uninterruptible sleep" state, making the kernel count the CPU utilization as 100%, leading to the bugos 1.0 system load. Other reports of the same issue: http://www.orangepi.org/orangep...
综上所述,本文的主要贡献有: 协调内核(Coordination kernel):我们提出了一种无等待的协调服务,该服务具有宽松的一致性保证,可用于分布式系统。 尤其是,我们描述了协调内核的设计与实现,并且我们已在许多关键应用程序中使用他来实现了各种协调技术。 协调方法(Coordination recipes):我们展示了ZooKeeper如何用于构建更高...
Coordination kernel: 为了在分布式系统中使用,我们添了一个提供 relaxed 的一致性保证的 wait-free 的协作服务。特别是,我们描述了协调内核的设计和实现,我们已经在许多关键应用程序中使用了协调内核来实现各种协调技术。 Coordination recipes: 我们展示了 ZooKeeper 如何可用于构建通常在分布式应用程序中使用的高级协调原...
for POSIX message queue implementation. identifiers. implementation-dependent constants usually defined in limits.h. initializers. of POSIX errnos. of sigev_notify. pcTaskGetHandle pcTaskGetName policies. status flags for open(), openat(), and fcntl(). taskDISABLE_INTERRUPTS taskENABLE_INTERRUPTS ta...
queue id The ID of the OLTP queue for which this session is waiting. process# The process number of the process in which this session runs. wait time The intended wait time for this session. queue waitThe direct loader uses a queue of slots for managing buffers. These slots are ...
As part of a class assignment that focuses on scheduling processes using blocking and locks, we are required to implement two kernel functions. int wait_event_interruptible(wait_queue_head_t q, CONDITION); void wake_up_all(wait_queue_head_t *q); ...
DpRqQInit: keep protect_queue / slots_per_queue 0 / 2001 in sys_admrdisp/queue_size_check_value : -> on,50,30,40,500,50,500,80EmInit: MmSetImplementation( 2 ).MM global diagnostic options set: 0<ES> client 0 initializing ...<ES> InitFreeList<ES> block size is 4096 kByte.<ES...