Memory coherency in application-level virtualization
A coherence protocol applied to memory pages maintains coherence between memory spaces on a plurality of nodes so that the threads of the runtime are operable on any of the nodes. The nodes operating according to the coherence protocol track a state and an epoch number for each memory page residing...
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| Main Authors | , , , |
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| Format | Patent |
| Language | English |
| Published |
27.08.2024
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| Subjects | |
| Online Access | Get full text |
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| Abstract | A coherence protocol applied to memory pages maintains coherence between memory spaces on a plurality of nodes so that the threads of the runtime are operable on any of the nodes. The nodes operating according to the coherence protocol track a state and an epoch number for each memory page residing therein. The states include a modified state in which only one particular node has an up-to-date copy of the memory page, an exclusive state in which only one particular node owns the memory page, a shared state in which all nodes that have the memory page in the shared state have the same copy, and a lost state in which the memory page cannot be either read or written. The epoch number is a number that is incremented each time the page enters the modified state and is used to determine whether the page contains data that is stale. |
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| AbstractList | A coherence protocol applied to memory pages maintains coherence between memory spaces on a plurality of nodes so that the threads of the runtime are operable on any of the nodes. The nodes operating according to the coherence protocol track a state and an epoch number for each memory page residing therein. The states include a modified state in which only one particular node has an up-to-date copy of the memory page, an exclusive state in which only one particular node owns the memory page, a shared state in which all nodes that have the memory page in the shared state have the same copy, and a lost state in which the memory page cannot be either read or written. The epoch number is a number that is incremented each time the page enters the modified state and is used to determine whether the page contains data that is stale. |
| Author | Cully, Aidan Kim, Hyojong Veljko, Duan Zhou, Husheng |
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| Notes | Application Number: US202218083356 |
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| Title | Memory coherency in application-level virtualization |
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