Memory physical address query method and device

Abstract

The invention provides a memory physical address query method and device. The method includes: storing the page table entry of the second thread to be addressed stored in the standby cache into the prefetch cache, and storing pages that have not been queried within a set time in the bypass translation cache in the standby cache table entry; receiving the memory addressing request message carrying the virtual address sent by the second thread; querying the corresponding physical address in the bypass translation buffer and the prefetch buffer according to the virtual address. The memory physical address query method and device provided by the present invention simultaneously perform query in the bypass conversion buffer and the prefetch buffer according to the virtual address of the second thread to be addressed, and the bypass conversion buffer is stored in the prefetch buffer The page table entries of the second thread that have not been queried within a set period of time in the register, thereby increasing the hit probability of querying the physical address corresponding to the virtual address and shortening the addressing time.

Description

technical field [0001] The present invention relates to the field of information technology, in particular to a method and device for inquiring physical memory addresses. Background technique [0002] At present, most processors use a virtual address (Virtual Address, VA for short) to address memory, and virtual address technology can create an addressing space much larger than an actual physical address (Physical Address, PA for short). Most processors that use virtual memory use a paging mechanism. The virtual address space is divided in units of pages. Correspondingly, the physical address space is also divided in units of pages. In the process of addressing memory by using the virtual address, the memory management unit (Memory Management Unit, MMU for short) in the processor needs to convert the received virtual address into a physical address. At present, most processors use a bypass translation buffer to cache the page table cache (Translation Lookaside Buffer, TLB f...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a memory physical address query method and device to solve the problem of long addressing time in the prior art

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