FAULT BUFFER FOR RESOLVING PAGE FAULTS IN UNIFIED VIRTUAL MEMORY SYSTEM

摘要

A system for managing virtual memory. The system includes a first processing unit configured to execute a first operation that references a first virtual memory address. The system also includes a first memory management unit (MMU) associated with the first processing unit and configured to generate a first page fault upon determining that a first page table that is stored in a first memory unit associated with the first processing unit does not include a mapping corresponding to the first virtual memory address. The system further includes a first copy engine associated with the first processing unit. The first copy engine is configured to read a first command queue to determine a first mapping that corresponds to the first virtual memory address and is included in a first page state directory. The first copy engine is also configured to update the first page table to include the first mapping.

主权项

1. A system for resolving page faults with a fault buffer, the system comprising:
a fault buffer configured to store a plurality of fault buffer entries, wherein a first fault buffer entry included in the plurality of fault buffer entries is associated with a first page fault generated by a first processing unit; and a first fault handler coupled to the fault buffer and configured to:
read one or more fault buffer entries that are associated with the first page fault and are stored in the fault buffer, andtrigger a first page fault sequence to remedy the first page fault, wherein the first page fault sequence includes at least one command that is configured to be executed by a copy engine associated with the first processing unit.