发明名称 |
Task synchronization mechanism and method |
摘要 |
A task synchronization mechanism operates on a global lock that is shared between processors an on local locks that are not shared between processors. The local locks are processor-specific locks. Each processor-specific lock is dedicated to a particular processor in the system. When shared access to a resource is required, a processor updates its processor-specific lock to indicate the processor is sharing the resource. Because each processor-specific lock is dedicated to a particular processor, this eliminates a significant portion of the memory bus traffic associated with all processors reading and updating the same lock. When exclusive access to a resource is required, the requesting processor waits until the count of all processor-specific locks indicate that none of these processors have a lock on the resource. Once no processor has a lock on the resource, exclusive access to the resource may be granted.
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申请公布号 |
US6990560(B2) |
申请公布日期 |
2006.01.24 |
申请号 |
US20030346010 |
申请日期 |
2003.01.16 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
ARMSTRONG WILLIAM JOSEPH;CORRIGAN MICHAEL JOSEPH;RICARD GARY ROSS;TORZEWSKI TIMOTHY JOSEPH |
分类号 |
G06F12/02;G06F9/46;G06F12/00;G06F12/14 |
主分类号 |
G06F12/02 |
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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