Direct access inter-process shared memory
| DWPI Title: Method for directly sharing physical memory between processes executing on cores for massively parallel computer, involves cross-mapping address spaces of processes by populating entries of top level virtual address tables |
| Abstract: A technique for directly sharing physical memory between processes executing on processor cores is described. The technique includes loading a plurality of processes into the physical memory for execution on a corresponding plurality of processor cores sharing the physical memory. An address space is mapped to each of the processes by populating a first entry in a top level virtual address table for each of the processes. The address space of each of the processes is cross-mapped into each of the processes by populating one or more subsequent entries of the top level virtual address table with the first entry in the top level virtual address table from other processes. |
| Use: Method for directly sharing physical memory between processes executing on separate processor cores for a multi-core parallel processing system i.e. computer cluster or massively parallel computer. |
| Advantage: The method enables breaking a parallel processing job into a collection of smaller jobs, which are assigned to individual processing nodes, so as to solve a complex and time consuming problem more quickly. |
| Novelty: The method involves loading processes into a physical memory for execution on corresponding processor cores sharing the physical memory. An address space is mapped to each of the processes by populating a first entry in respective top level virtual address table (500) for each of the processes. The address space of each of the processes is cross-mapped into each of the other processes by populating subsequent entries of each of the top level virtual address tables with the first entry in the top level virtual address table from other processes. |
| Filed: 9/1/2009 |
| Application Number: US2009551666A |
| Tech ID: SD 11037.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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