S3 Graphics Co., Ltd.

I-Chung Ling

Chih-Hong Fu

Huai-Shih Hsu

A synchronized two-level cache including a level 1 cache and a level 2 cache is implemented in a graphics processing system. The level 2 cache is further partitioned into a number of slots which are dynamically allocated to texture maps as needed. The reference counter of each of the cache lines in each cache level is tracked so that a cache line is not overwritten with new data prior to transferring old data out to the recipient device. The age status of each cache line is tracked so that the oldest cache line is overwritten first. The use of a synchronized two-level cache system conserves system memory bandwidth and reduces memory latency, thereby improving the graphics processing system's performance.

Synchronized two-level graphics processing cache

A synchronized two-level cache including a Level 1 cache and a Level 2 cache is implemented in a graphics processing system. The Level 2 cache is further partitioned into a number of slots which are dynamically allocated to texture maps as needed. The reference counter of each of the cache lines in each cache level is tracked so that a cache line is not overwritten with new data prior to transferring old data out to the recipient device. The age status of each cache line is tracked so that the oldest cache line is overwritten first. The use of synchronized two-level cache system conserves system memory bandwidth and reduces memory latency, thereby improving the graphics processing system's performance.

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Saratoga, CA, United States of America

I-Chung Ling