发明授权
- 专利标题: Hypertransport data path protocol
- 专利标题(中): 超传输数据路径协议
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申请号: US10818670申请日: 2004-04-06
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公开(公告)号: US07117308B1公开(公告)日: 2006-10-03
- 发明人: John W. Mitten , Christopher G. Riedle , David Richard Barach , Kenneth H. Potter, Jr. , Kent Hoult , Jeffery B. Scott
- 申请人: John W. Mitten , Christopher G. Riedle , David Richard Barach , Kenneth H. Potter, Jr. , Kent Hoult , Jeffery B. Scott
- 申请人地址: US CA San Jose
- 专利权人: Cisco Technology, Inc.
- 当前专利权人: Cisco Technology, Inc.
- 当前专利权人地址: US CA San Jose
- 代理机构: Cesari and McKenna, LLP
- 主分类号: G06F12/00
- IPC分类号: G06F12/00
摘要:
A data path protocol eliminates most of the conventional read transactions required to transfer data between devices interconnected by a split transaction bus, such as a HyperTransport (HPT) bus. To that end, each device is configured to manage its own set of buffer descriptors, unlike previous data path protocols in which only one device managed all the buffer descriptors. As such, neither device has to perform a read transaction to retrieve a “free” buffer descriptor from the other device. As a result, only write transactions are performed for transferring descriptors across the HPT bus, thereby decreasing the amount of traffic over the bus and eliminating conventional latencies associated with read transactions. In addition, because descriptors are separately managed in each device, the data path protocol also conserves processing bandwidth that is traditionally consumed by managing ownership of the buffer descriptors within a single device.