Split Programmable Micro-Operations Cache for Processor Frontend
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Solution Overview
Problem
Existing processor architectures lack efficient programmability of frontend resources, particularly micro-operations caches, which leads to suboptimal performance and increased conflict misses in high-performance applications.
Innovation Solution
The implementation of a processor with a split programmable micro-operations cache (SP-UC) that includes multiple micro-operations caches and an instruction set architecture (ISA) that supports programmability, allowing for dynamic selection and switching of active caches using specific instructions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single micro-operations cache is used in traditional processor architectures, then the device complexity is low and ease of manufacture is improved, but conflict misses increase and performance deteriorates in high-performance applications
Solution Approach 1:
The micro-operations cache is segmented into multiple independent caches (e.g., UC0, UC1, UC2) that can be selectively activated. Each cache can store micro-operations from different instruction types or control blocks, allowing the processor to reduce conflict misses by distributing access patterns across multiple caches while maintaining manageable complexity through modular design
2Productivity
If multiple micro-operations caches are implemented to reduce conflict misses, then processor performance is improved, but device complexity increases and manufacturing becomes more difficult
Solution Approach 1:
Multiple micro-operations caches are designed with identical structures and functions, allowing them to be manufactured using the same processes. The caches are universally interchangeable and can be activated or deactivated as a group, simplifying manufacturing while achieving performance benefits through parallel cache structures
3Adaptability or versatility
If traditional non-programmable micro-operations cache is used, then the device complexity is low, but adaptability to different application requirements is limited
Solution Approach 1:
The micro-operations cache system is made dynamic through programmable control, allowing the active cache configuration to change based on application requirements. The ISA provides instructions that enable runtime adjustment of cache activation, creating an adaptive system that can optimize performance for different workloads while maintaining a relatively simple base structure
Data Source
AI summary
Various example embodiments of a processor are presented. Various example embodiments of a processor may be configured to support split programmability of resources of a processor frontend of the processor. Various example embodiments of a processor are configured to support split programmability of resources of a processor frontend of the processor in a manner enabling assignment of split programmable resources of the frontend of the processor to control blocks of a program being executed by the processor. Various example embodiments of a processor are configured to support split programmability of micro-operations (UOPs) cache (UC) resources of the frontend of the processor (which may then be referred to as a split programmable (SP) UC (SP-UC), where it may be referred to as “split” since there are multiple UCs and may be referred to as “programmable” since selection of the active UC from the set of multiple UCs is controllable by the program executed by the processor).