Invention Grant
US07921275B2 Method for enabling direct prefetching of data during asychronous memory move operation
失效
用于在异步存储器移动操作期间直接预取数据的方法
- Patent Title: Method for enabling direct prefetching of data during asychronous memory move operation
- Patent Title (中): 用于在异步存储器移动操作期间直接预取数据的方法
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Application No.: US12024598Application Date: 2008-02-01
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Publication No.: US07921275B2Publication Date: 2011-04-05
- Inventor: Ravi K. Arimilli , Robert S. Blackmore , Chulho Kim , Balaram Sinharoy , Hanhong Xue
- Applicant: Ravi K. Arimilli , Robert S. Blackmore , Chulho Kim , Balaram Sinharoy , Hanhong Xue
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Dillon & Yudell LLP
- Main IPC: G06F12/00
- IPC: G06F12/00

Abstract:
While an asynchronous memory move (AMM) operation is ongoing, a prefetch request for data from the source effective address or the destination effective address triggers cache injection by the AMM mover of relevant data from the stream of data being moved in the physical memory. The memory controller forwards the first prefetched line to the prefetch engine and L1 cache, the next cache lines in the sequence of data to the L2 cache, and a subsequent set of cache lines to the L3 cache. The memory controller then forwards the remaining data to the destination memory location. Quick access to prefetch data is enabled by buffering the stream of data in the upper caches rather than placing all the moved data within the memory. Also, the memory controller places moved data into only a subset of the available cache lines of the upper level cache.
Public/Granted literature
- US20090198908A1 METHOD FOR ENABLING DIRECT PREFETCHING OF DATA DURING ASYCHRONOUS MEMORY MOVE OPERATION Public/Granted day:2009-08-06
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