摘要:
A frame based data transfer device includes a receive frame parser, a receive frame processor, and a DMA engine. The receive frame parser receives a frame, stores framing information from the frame in a receive header queue, and stores an information unit from the frame in an information unit buffer. The receive frame processor is coupled to the receive header queue. The receive frame processor reads a transport layer task context as determined by a tag field in the framing information, determines how to handle the frame from the transport layer task context and framing information, generates a DMA descriptor, and stores an updated transport layer task context. The DMA engine is coupled to the information unit buffer and receive frame processor. The DMA engine reads a DMA task context, transfers the information unit to a destination memory by processing the DMA descriptor, and stores an updated DMA task context.
摘要:
A method, computer program product, system (including a circuit card), and integrated circuit for initializing a buffer pool, such that the buffer pool includes a plurality of data buffers available for use during a plurality of I/O transfers. In response to the initiation of a first I/O transfer concerning a first data portion being transferred from a first data source to a first data target, the first data portion is written to a first portion of the plurality of data buffers. The first data portion is transferred to the first data target, and the first portion of the plurality of data buffers is released back to the buffer pool for use during one or more subsequent I/O transfers.
摘要:
Methods of scheduling tasks in computer systems architectures are disclosed. In one aspect, a method may include comparing a connection address of a first node with a connection address of a second node, determining that the connection address of the first node matches the connection address of the second node, and scheduling tasks to the first and second nodes based, at least in part, on the determination. Apparatus to implement task scheduling, and systems including the apparatus are also disclosed.
摘要:
Disclosed is a target port that implements a transport layer retry (TLR) mechanism. The target port includes a circuit having a transmit transport layer and receive transport layer in which both the transmit and receive transport layers are coupled to a link. A transmit protocol processor of the transmit transport layer controls a TLR mechanism in a serialized protocol. A receive protocol processor of the receive transport layer is coupled to the transmit transport layer and likewise controls the TLR mechanism in the serialized protocol.
摘要:
An embodiment of the present invention is a technique to process a plurality of I/O sequences associated with a storage device. A task context pre-fetch engine pre-fetches a task context from a task context memory based on a pre-fetch request. At least a multi-threaded transmit transport layer (T×TL) processes the plurality of I/O sequences from an I/O pool simultaneously. The multi-threaded T×TL generates the pre-fetch request and one or more frames from the plurality of I/O sequences. A switch fabric and controller routes the frame to a link layer associated with the storage device.
摘要:
A device includes a task context controller, at least one transport engine connected to the task context controller, and at least one comparator connected to the transport engine. The comparator to compare a data offset from a receive frame with a current data offset and a result is used to determine frame processing order.
摘要:
A method and apparatus for managing task context are provided. Upon initialization, a protocol engine provides context resources available for processing tasks to a task issuer. Based on available context resources, the task issuer creates and manages a free list of available task context indices and assigns an index to a task prior to storing task context in a context memory accessible to both the task issuer and the protocol engine and issuing the task to the protocol engine.
摘要:
A frame based data transfer device includes a receive frame parser, a receive frame processor, and a DMA engine. The receive frame parser receives a frame, stores framing information from the frame in a receive header queue, and stores an information unit from the frame in an information unit buffer. The receive frame processor is coupled to the receive header queue. The receive frame processor reads a transport layer task context as determined by a tag field in the framing information, determines how to handle the frame from the transport layer task context and framing information, generates a DMA descriptor, and stores an updated transport layer task context. The DMA engine is coupled to the information unit buffer and receive frame processor. The DMA engine reads a DMA task context, transfers the information unit to a destination memory by processing the DMA descriptor, and stores an updated DMA task context.
摘要:
Disclosed is an initiator port that implements a transport layer retry (TLR) mechanism. The initiator port includes a circuit having a transmit transport layer and receive transport layer in which both the transmit and receive transport layers are coupled to a link. A transmit protocol processor of the transmit transport layer controls a TLR mechanism in a serialized protocol. A receive protocol processor of the receive transport layer is coupled to the transmit transport layer and likewise controls the TLR mechanism in the serialized protocol.
摘要:
A device includes a cache memory having a locked segment and an unlocked segment. A controller is connected to the cache memory. A method partitions a cache memory into context segments and associates a context entry with at least one of the context segments if a transport layer completes processing a frame for the context entry. The at least one segment is an unlocked context segment.