Pre-Grant Publication Number: 20080104325
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Prior Art Detail
Summary / Description
| Summary / Description | The present invention relates generally to memories in computer processing systems and, in particular, to a method and apparatus for memory prefetching based on intra-page usage history. |
Basic Information
| Type of Prior Art | Issued Patents - US |
| Country | United States of America |
| Patent/Application # | 6678795 |
| Kind Code | United States (US) - United STATES Patent - A |
| Patentee Name | International Business Machines Corporation |
| Relevant Pages, Columns, or Lines | col.1 row 50 - col. 2 row 2; c |
| URL | |
| Filing Date | August 15, 2000 |
| Additional Information | |
Notes / To Do
| Notes | Entering prior art on behalf of John-David Wellman. |
Excerpt
Excerpt ...a method and apparatus for memory prefetching based on intra-page usage history. The invention employs data-centric techniques to reduce data/instruction misses in cache memories in a computer processing system. The invention is based upon a mechanism for data/instruction prefetching which, in turn, is based upon prior intra-page usage. The concept is to monitor and keep a history of which cache lines (data/instructions) within a page are used, and attempt to pull multiple cache lines when the previous usage of a page appears to repeat. Cache lines may be pulled directly from main memory or from higher level caches,...
...the invention may prefetch arbitrary lines within a page which do not need to exhibit any pattern, only history that they have been used in the past.
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Claims
1
Relevance
Disclosed is a mechanism, equivalent to the 'monitor agent', which examines accesses/requests and determines when and if additional data, beyond that requested or produced, should be moved between levels of memory.
Disclosed is a mechanism, equivalent to the 'monitor agent', which examines accesses/requests and determines when and if additional data, beyond that requested or produced, should be moved between levels of memory.
Claim Chart
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13
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Disclosed is a mechanism, equivalent to the 'monitor agent', which monitors accesses/requests and determines when and if additional data, beyond that requested or produced, should be moved between levels of memory.
Disclosed is a mechanism, equivalent to the 'monitor agent', which monitors accesses/requests and determines when and if additional data, beyond that requested or produced, should be moved between levels of memory.
Claim Chart
All
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