Enregistered Memory Tracking for Thread Safety and Performance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing binary translation techniques do not fully utilize additional registers in new hardware architectures, leading to suboptimal performance due to the lack of effective enregistering methods that ensure correct memory access across multiple threads.
Innovation Solution
A system that tracks enregistered memory locations by using additional registers in the target hardware implementation, rewriting instructions to access these registers instead of memory, and employing a table to manage thread access and ensure up-to-date values, while preventing stale value access by other threads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If binary translation is used to translate object code to a new hardware architecture with more registers, then code portability is improved, but performance is worsened due to inability to utilize additional registers
Solution Approach 1:
The system dynamically identifies memory locations that are frequently accessed by a single thread and transforms accesses to these locations from memory operations to register operations. This dynamic adaptation allows the translated code to exploit additional registers in the target architecture, improving performance while maintaining portability through binary translation.
Solution Approach 2:
The invention changes the parameter of memory access by transforming memory access instructions into register access instructions for frequently accessed locations. This parameter change from memory-access to register-access mode enables utilization of additional registers and improves execution speed without affecting code portability.
2Speed
If enregistering is used to cache frequently accessed memory locations in registers, then memory access speed is improved, but thread safety is worsened due to potential stale values when multiple threads access the same location
Solution Approach 1:
The system establishes feedback mechanisms through memory access traps and validation checks. When a thread attempts to access an enregistered memory location, the system checks whether the location is currently enregistered and by which thread. This feedback loop ensures that stale values are detected and prevented, maintaining thread safety while preserving the performance benefits of enregistering.
Solution Approach 2:
The invention introduces an intermediary validation mechanism between the thread and the enregistered memory location. The validation logic acts as a mediator that intercepts memory access attempts, checks the enregistration status, and ensures that threads receive up-to-date values. This intermediary layer maintains thread safety without eliminating the performance benefits of register caching.
3Loss of energy
If additional registers are used to cache memory locations, then memory traffic is reduced, but system complexity is increased due to need to track enregistered locations and manage thread access
Solution Approach 1:
The system performs preliminary identification of frequently accessed memory locations through profiling or static analysis before execution. By pre-identifying candidate locations for enregistering, the system reduces the runtime complexity of tracking and management. This preliminary action allows the system to establish enregistration patterns in advance, reducing both memory traffic and runtime management overhead.
Data Source
AI summary
Described is a system that tracks enregistered memory locations. The system receives program object code that enregisters a memory location (e.g., a set of data at a given memory address) and executes the program code using a thread. Enregistering memory locations involves using additional registers to cache frequently used memory locations while the object code is executing, these additional registers being available on an architecture on which the program executes, but generally not available on an architecture for which the object code was generated. After enregistering the memory location, the system uses a table that identifies enregistered memory locations to track the associated memory address and a thread identifier for the thread. The system checks this table during memory accesses to ensure that other threads attempting to access an enregistered memory location receive a current value for the enregistered memory location.