Invention Grant
US08156260B2 Data transfer device and method for selecting instructions retained in channel unit based on determined priorities due to the number of waiting commands/instructions
有权
数据传输装置和方法,用于根据等待命令/指令的数量,基于确定的优先级来选择保留在信道单元中的指令
- Patent Title: Data transfer device and method for selecting instructions retained in channel unit based on determined priorities due to the number of waiting commands/instructions
- Patent Title (中): 数据传输装置和方法,用于根据等待命令/指令的数量,基于确定的优先级来选择保留在信道单元中的指令
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Application No.: US12502573Application Date: 2009-07-14
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Publication No.: US08156260B2Publication Date: 2012-04-10
- Inventor: Yuichi Ogawa
- Applicant: Yuichi Ogawa
- Applicant Address: JP Kawasaki
- Assignee: Fujitsu Limited
- Current Assignee: Fujitsu Limited
- Current Assignee Address: JP Kawasaki
- Agency: Fujitsu Patent Center
- Priority: JP2008-209032 20080814
- Main IPC: G06F3/00
- IPC: G06F3/00 ; G06F13/36

Abstract:
A data transfer device for performing direct memory access (DMA) transfer of data stored in a storage unit to a plurality of other devices includes: a plurality of channel units arranged to correspond to the other devices, the channel units retaining DMA transfer instructions, and outputting number of the DMA transfer instructions retained; a plurality of priority controllers for determining priorities of the channel units on the basis of the number of the DMA transfer instructions retained in the channel units, respectively; an arbiter for selecting one of the DMA transfer instructions retained in one of the channel units on the basis of the priorities determined by the priority controller; and a data transfer processor for performing DMA transfer of data stored in the storage unit to one of the other devices in accordance with the DMA transfer instruction selected by the arbiter.
Public/Granted literature
- US20100042756A1 DATA TRANSFER DEVICE Public/Granted day:2010-02-18
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