发明名称 |
FORWARDING METHOD TO RETRIED SNOOP HIT, AND DATA PROCESSING SYSTEM |
摘要 |
PROBLEM TO BE SOLVED: To obtain an improved method and device to process a snooping operation in a multi-processor system. SOLUTION: When a device which snoops around a system bus 122 detects an operation which requests data resident in a local memory in a certain coherency state, the device tries intervention. If this intervention is hindered by a second device which asserts retry, the device sets a flag which provides activity record information related to the intervention where a hindrance occurs. When the device asserts the intervention again and the snooped operation is retried again at the time of a following snoop hit to the same cache position, the device takes a measure to change the coherency state of a requested cache item to the final coherency state which is expected to be the result of the original operation requesting the cache item. |
申请公布号 |
JPH11328023(A) |
申请公布日期 |
1999.11.30 |
申请号 |
JP19990031503 |
申请日期 |
1999.02.09 |
申请人 |
INTERNATL BUSINESS MACH CORP <IBM> |
发明人 |
ARIMILLI RAVI KUMAR;DODSON JOHN STEVEN;LEWIS JERRY DON |
分类号 |
G06F12/08 |
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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