METHODS TO SELECT THE DYNAMIC SUPER QUEUE SIZE FOR CPUS WITH HIGHER NUMBER OF CORES
Abstract:
Methods and apparatus for dynamic selection of super queue size for CPUs with higher number of cores. An apparatus includes a plurality of compute modules, each module including a plurality of processor cores with integrated first level (L1) caches and a shared second level (L2) cache, a plurality of Last Level Caches (LLCs) or LLC blocks and a plurality of memory interface blocks interconnect via a mesh interconnect. A compute module is configured to arbitrate access to the shared L2 cache and enqueue L2 cache misses in a super queue (XQ). The compute module further is configured to dynamically adjust the size of the XQ during runtime operations. The compute module tracks parameters comprising an L2 miss rate or count and LLC hit latency and adjusts the XQ size as a function of these parameters. A lookup table using the L2 miss rate/count and LLC hit latency may be implemented to dynamically select the XQ size.
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