FAULT BUFFER FOR TRACKING 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 tracking page faults, the system comprising:
a first processing entity configured to:
execute a first instruction that is associated with a first virtual memory address,determine that a first page table associated with the first processing entity does not include a first mapping associated with the first virtual memory address, andtransmit a first fault buffer entry to a fault buffer in response to determining that that first page table does not include the first mapping, wherein the fault buffer is configured to store a plurality of fault buffer entries received from at least the first processing entity.