Working set swapping using a sequentially ordered swap file

摘要

Techniques described enable efficient swapping of memory pages to and from a working set of pages for a process through the use of large writes and reads of pages to and from sequentially ordered locations in secondary storage. When writing pages from a working set of a process into secondary storage, the pages may be written into reserved, contiguous locations in a dedicated swap file according to a virtual address order or other order. Such writing into sequentially ordered locations enables reading in of clusters of pages in large, sequential blocks of memory, providing for more efficient read operations to return pages to physical memory.

主权项

1. A computer-implemented method comprising:
identifying one or more candidate pages for swapping from a working set of pages for a process; determining whether a swap file includes enough space to be reserved for swapping one or more of the candidate pages; in response to determining the amount of space is insufficient, dynamically modifying the amount of space in the swap file to reserve space in the swap file; and in response to determining the amount of space is sufficient, reserving space in the swap file.