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Method, system, and storage medium for providing queue pairs for I/O adapters

A technology of adapters and queue pairs, applied in transmission systems, digital transmission systems, instruments, etc., can solve problems that are no longer suitable for high-performance computing systems

Inactive Publication Date: 2006-08-09
IBM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even now, the industry-standard mechanisms described above are no longer suitable for HPC systems

Method used

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  • Method, system, and storage medium for providing queue pairs for I/O adapters
  • Method, system, and storage medium for providing queue pairs for I/O adapters
  • Method, system, and storage medium for providing queue pairs for I/O adapters

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Embodiment Construction

[0016] Exemplary embodiments of the present invention provide low-latency queue pairs that eliminate the overhead associated with work queue units and define the mechanisms required to allow messages to be placed directly on the queue pair. The exemplary embodiments are best implemented in a distributed computing system, such as a prior art system area network (SAN) having end nodes, switches, routers, and links interconnecting these components. Figures 1 through 5 show various parts of an exemplary operating environment for an embodiment of the present invention. Fig. 6 shows a standard queue pair structure in the prior art. Figure 7 shows an exemplary embodiment of a low-latency queue pair.

[0017] Figure 1 is a diagram of a distributed computer system. The distributed computer system shown in FIG. 1 takes the form of a system area network (SAN) 100 and is provided for exemplary purposes only. The exemplary embodiments of the present invention described below can be impl...

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Abstract

A low-latency queue pair (QP) is provided for I / O Adapters that eliminates the overhead associated with work queue elements (WQEs) and defines the mechanisms necessary to allow the placement of the message directly on the queue pair.

Description

technical field [0001] The present disclosure relates generally to computer and processor architecture, input / output (I / O) processing, operating systems, and more specifically, to low-latency queue pairs for I / O adapters ( QP). Background technique [0002] I / O adapters, such as remote direct memory access (RDMA) capable adapters, or RDMA network interface cards (RNICs), such as InfiniBand TM (IB) A host channel adapter (HCA), which defines queue pairs (QPs) for passing message information from software consumers to adapters over a network fabric. industry standards such as those available from InfiniBandInfiniBand acquired by the Trade Association TM The architecture specification and iWarp from the RDMA Consortium specify that message information carried on a QP is in the form of a work queue element (WQE) carrying control information belonging to the message. Additionally, one or more data descriptors point to where the message data will be transmitted or the recei...

Claims

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Application Information

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IPC IPC(8): G06F13/00H04L12/56H04L12/861
Inventor 戴维·F.·克拉多克托马斯·A.·格里格凯文·J.·雷利
Owner IBM CORP