发明名称 |
Computer system supporting both dirty-shared and non-dirty-shared data processing entities |
摘要 |
A computer system supports a first set of processors configured to operate in a dirty-shared mode and a second set of processors configured to operate in a non dirty-shared mode. The computer system may include a portion of shared memory that stores data in terms of memory blocks. Upon receiving a snoop read requesting shared access to a memory block held in a dirty state, a dirty-shared processor sends a copy of the memory block to the originator of the snoop read and retains a valid a copy of the block in its cache. Non dirty-shared processors additionally write the block back to main memory in response to snoop reads and may also send a copy to the originator. Until the write back is completed at main memory or another processor is granted write access to the block, the dirty-shared and non dirty-shared processors preferably continue to satisfy sub-sequent snoop reads targeting the memory block.
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申请公布号 |
US6898676(B2) |
申请公布日期 |
2005.05.24 |
申请号 |
US20020263741 |
申请日期 |
2002.10.03 |
申请人 |
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. |
发明人 |
VAN DOREN STEPHEN R.;TIERNEY GREGORY E. |
分类号 |
G06F12/08;(IPC1-7):G06F12/00 |
主分类号 |
G06F12/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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