Reconfigurable Processor Context Switching
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Solution Overview
Problem
Reconfigurable processors face inefficiencies in context switching due to overhead cycles, which hinder effective multi-threading during stalls, as the duration of stalls is not adequately utilized due to longer context switching cycles.
Innovation Solution
Dividing memory areas into separate regions for each thread, allowing context information to be pre-stored and loaded quickly, enabling context switching without overhead cycles by using configuration information and input values stored in global registers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional context switching is performed during stalls, then multi-threading is implemented, but the context switching cycle exceeds the stall duration making effective multi-threading impossible
Solution Approach 1:
The patent pre-loads context information for multiple threads into separate memory areas before stalls occur. When a stall happens, the processor can immediately switch to another thread by loading pre-prepared context information, eliminating the need for time-consuming context switching operations during the stall period.
Solution Approach 2:
The patent divides the memory into multiple distinct areas, with each area dedicated to storing context information for a specific thread. This segmentation allows the processor to quickly access and switch between thread contexts by simply changing the active memory area, rather than managing a single unified memory space.
2Productivity
If context switching is performed during calculation, then processing continuity is maintained, but overhead cycles are incurred reducing processing speed
Solution Approach 1:
Context information for all threads is pre-loaded into dedicated memory areas before any context switching is needed. This preliminary preparation eliminates the need for time-consuming data loading operations during context switching, thereby removing overhead cycles and maintaining processing speed.
Solution Approach 2:
The patent creates copies of context information for each thread and stores them in separate memory areas. Instead of sharing or dynamically generating context data during switching, each thread has its own pre-prepared context copy ready for immediate activation.
Data Source
AI summary
Disclosed are a reconfigurable processor and processing method, a reconfiguration control apparatus and method, and a thread modeler and modeling method. A memory area of a reconfigurable processor may be divided into a plurality of areas, and a context enabling a thread process may be stored in respective divided areas, in advance. Accordingly, when a context switching is performed from one thread to another thread, the other thread may be executed by using information stored in an area corresponding to the other thread.