Emulator Code Cache for Dynamic Compilation Efficiency
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Solution Overview
Problem
Emulator software experiences performance degradation due to the time-consuming process of switching between host and guest environments for code compilation, as it requires repetitive compilation of guest platform-compatible code into host-compatible code.
Innovation Solution
Implementing a code cache within the emulator application that stores previously compiled code, using a hash table for identification and retrieval of matching code blocks, allowing for reuse instead of recompilation, thereby reducing the need for repetitive code compilation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If code is compiled dynamically by switching between host and guest environments, then host-compatible code can be generated for execution, but processing time and performance are consumed due to repetitive compilation
Solution Approach 1:
The patent implements a code cache that stores previously compiled host-compatible code blocks. When the same guest code is encountered again, the system retrieves the pre-compiled code from the cache instead of re-compiling, thereby performing the compilation action in advance and avoiding repetitive compilation operations.
Solution Approach 2:
The patent creates and stores copies of compiled code blocks in a code cache. These copied code blocks can be retrieved and executed without requiring the original compilation process to be repeated, thus reducing the time and resources needed for code generation.
2Productivity
If the host environment is activated to compile guest code, then host-compatible executable code is produced, but the guest environment must be paused or deactivated resulting in performance degradation
Solution Approach 1:
By pre-compiling code blocks and storing them in the code cache, the system eliminates the need to pause the guest environment and activate the host environment for compilation during normal execution. The preliminary compilation action is performed once, and subsequent executions use the cached code directly.
Solution Approach 2:
The code cache enables continuous execution of the guest environment without intermittent interruptions for compilation. Once code is in the cache, it can be retrieved and executed continuously without breaking the execution flow to switch environments.
3Reliability
If repetitive code compilation is performed, then up-to-date host-compatible code is generated, but valuable processing time and resources are wasted
Solution Approach 1:
The system performs code compilation once in advance and stores the result in the code cache. This preliminary action ensures the code is ready for execution without requiring repeated compilation, thus maintaining execution accuracy while conserving processing resources.
Solution Approach 2:
The code cache recovers previously compiled code blocks for reuse instead of discarding them after a single use. By recovering and reusing these compiled blocks, the system avoids redundant compilation operations and conserves processing energy.
Data Source
AI summary
Dynamically compiled code is stored for future use by an emulator application. The emulator application may recall the previously compiled code rather than recompile the same code again. Recycling previously compiled code prevents unneeded code compilation, and saves valuable processing time and resources. Previously compiled code can be associated with code identification information. When compiled code is needed, one or more indexes of compiled code identification information is searched. If the appropriate identification information is found, the corresponding code is loaded and executed.