System and method for information handling system memory page mapping optimization
Plural consecutive virtual memory pages associated with an application running on an information handling system are mapped to a physical memory page of the information handling system's physical memory, such as dual channel interleaved memory. Each physical memory page that stores plural consecutive virtual memory pages becomes an effective cache of those virtual memory pages with a RAS operation on the memory, thus providing more efficient memory access in streaming applications. A memory mapping engine associated with the operating system of the information handling system maps plural virtual memory pages to single physical memory pages according to a ratio of physical memory size to virtual memory size provided by a memory manager of the information handling system BIOS, such as with an ACPI message.
1. An information handling system comprising:
a processor operable to run an application under direction of an operating system;
a memory interfaced with the processor and operable to retrieve information in response to column and row address strobes, the information associated with a row address strobe forming a physical memory page;
an application running on the processor by retrieving information from virtual memory pages in a predetermined order; and
an operating system running on the processor, the operating system operable to map plural consecutively ordered virtual memory pages of the application to a single physical memory page.
2. The information handling system of claim 1 wherein the number of virtual memory pages mapped to a physical memory page is the ratio of physical memory page size over virtual memory page size.
3. The information handling system of claim 1 wherein the memory comprises dual channel interleaved random access memory.
4. The system of claim 1 wherein the application comprises a streaming application.
5. The system of claim 1 further comprising a BIOS interfaced with the processor, memory and operating system, the BIOS having a memory manager operable to determine the minimum physical memory page size of the memory and to communicate the minimum physical memory page size to the operating system for mapping virtual memory pages to a physical memory page.
6. The system of claim 5 wherein the memory manager provides physical memory page size as an Advanced Configuration and Power Interface (ACPI) message.
7. The system of claim 5 wherein the memory manager is further operable to override operating system mapping of virtual memory pages to physical memory pages.
8. A method for storing information, the method comprising:
running an application on an information handling system having a memory, the memory having plural physical memory pages;
defining virtual memory pages associated with the application;
mapping plural consecutive virtual memory pages to a physical memory page; and
storing information from the application to the virtual memory pages and mapping plural consecutive virtual memory pages to plural physical memory pages, each physical memory page storing plural consecutive virtual memory pages.
9. A method for storing information, the method comprising:
running an application on an information handling system having a memory, the memory having plural physical memory pages;
defining virtual memory pages associated with the application;
mapping plural consecutive virtual memory pages to a physical memory page;
storing information from the application to the virtual memory pages; and
retrieving information from the plural consecutive virtual memory pages by retrieving the physical memory page.
10. The method of claim 9 wherein the application comprises a streaming application.
11. A method for storing information, the method comprising:
running an application on an information handling system having a memory, the memory having plural physical memory pages;
defining virtual memory pages associated with the application;
mapping plural consecutive virtual memory pages to a physical memory page;
storing information from the application to the virtual memory pages;
determining the minimum physical memory page size of the information handling system;
determining a physical to virtual memory size ratio by dividing the minimum physical memory page size by the virtual memory page size; and
mapping the virtual memory pages to the physical memory page according to the ratio.
12. The method of claim 11 further comprising communicating the minimum physical memory page size in the information handling system with an ACPI message.
13. A method for storing information, the method comprising:
running an application on an information handling system having a memory, the memory having plural physical memory pages;
defining virtual memory pages associated with the application;
mapping plural consecutive virtual memory pages to a physical memory page;
storing information from the application to the virtual memory pages; and
selectively disabling the mapping.
14. A method for storing information, the method comprising:
running an application on an information handling system having a memory, the memory having plural physical memory pages;
defining virtual memory pages associated with the application;
mapping plural consecutive virtual memory pages to a physical memory page; and
storing information from the application to the virtual memory pages;
wherein the information handling system memory comprises a dual channel interleaved memory.
15. A system for storing information associated with an application running on an information handling system, the application having virtual memory pages, at least some of the virtual memory pages having a consecutive order, the information handling system having physical memory, the physical memory having physical memory pages, the system comprising:
a memory manager operable to determine a ratio of physical memory page size to virtual memory page size;
a memory mapping engine operable to apply the ratio to store plural consecutive virtual memory pages in a physical memory page; and
a memory map tracking the association of the virtual memory pages with the physical memory page.
16. The system of claim 15 wherein an operating system manages operation of the application on the information handling system, and wherein the memory mapping engine and memory map are operating system components.
17. The system of claim 16 wherein a BIOS manages information handling system hardware components including memory, and wherein the memory manager is a BIOS component.
18. The system of claim 17 wherein the memory manager communicates the ratio to the memory mapping engine with an ACPI message.
19. The system of claim 17 wherein the memory manager is further operable to override the mapping of plural consecutive virtual memory pages to the physical memory page.