SPDK_POLLER_REGISTER(bdev_nvme_poll)# 方向:从nvme设备取出应答数据,回复给bdevspdk_nvme_poll_group_process_completions nvme_transport_poll_group_process_completions spdk_nvme_transport_poll_group->transport->ops.poll_grou
SPDK_POLLER_REGISTER(bdev_nvme_poll) # 方向:从nvme设备取出应答数据,回复给bdev spdk_nvme_poll_group_process_completions nvme_transport_poll_group_process_completions spdk_nvme_transport_poll_group->transport->ops.poll_group_process_completions <A> nvme_pcie_poll_group_process_completions <B> nvme_...
entity which can be polled for completions. This new API consists of thespdk_nvme_poll_group family of functions. As a result of this new API, all NVMe transports are expected to implement several poll group related functions. A new flag,create_only, has been added to thespdk_nvme_io_q...
例如,使用SPDK用户态NVMe驱动访问相应的I/O QPair进行读写操作,SPDK 提供了异步读写的函数 (spdk_nvme_ns_cmd_read),同时检查是否完成的函数 (spdk_nvme_qpair_process_completions)。这些函数的调用应由一个线程完成,不应该跨线程处理。 SPDK 的I/O 路径也采用无锁化机制。当多个thread操作同意SPDK 用户态bloc...
const struct spdk_nvme_transport * nvme_get_first_transport(void) { return TAILQ_FIRST(&g_spdk_nvme_transports); }const struct spdk_nvme_transport * nvme_get_next_transport(const struct spdk_nvme_transport *transport) { return TAILQ_NEXT(transport, link);...
例如,使用SPDK用户态NVMe驱动访问相应的I/O QPair进行读写操作,SPDK 提供了异步读写的函数 (spdk_nvme_ns_cmd_read),同时检查是否完成的函数 (spdk_nvme_qpair_process_completions)。这些函数的调用应由一个线程完成,不应该跨线程处理。 SPDK 的I/O 路径也采用无锁化机制。当多个thread操作同意SPDK 用户态...
如果不使用SPDK应用编程框架,则需要编程者自己注意这个事项。例如,使用SPDK用户态NVMe驱动访问相应的I/O QPair进行读写操作,SPDK 提供了异步读写的函数 (spdk_nvme_ns_cmd_read),同时检查是否完成的函数 (spdk_nvme_qpair_process_completions)。这些函数的调用应由一个线程完成,不应该跨线程处理。
spdk_nvme_cmd_cb user_cb_fn; void *user_cb_arg; void *user_buffer; }; struct nvme_completion_poll_status { struct spdk_nvme_cpl cpl; uint64_t timeout_tsc; /** * DMA buffer retained throughout the duration of the command. It'll be released * automatically if the c...
Poll on a flag that marks the completion of both the read and write of the data. If the request is still in flight we can poll for the completions for a given queue pair. Although the actual reading and writing of the data is asynchronous,the spdk_nvme_qpair_process_completions function...
poll for completions. Polling an NVMe device is fast because only host memory needs to be read (no MMIO) to check a queue pair for a bit flip and technologies such as Intel's DDIO will ensure that the host memory being checked is present in the CPU cache after an ...