Completion Queue Reduces Call Stack Usage for Future Objects
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional implementations of future objects in asynchronous computations rely on the current thread's call stack for completion data and notifications, leading to large call stacks that negatively impact system performance and can result in stack overflow errors.
Innovation Solution
Employing a completion queue instead of the call stack to manage future object completions, where a processor device determines if a thread is associated with a completion queue and creates one if necessary, enqueues completion operations, and dequeues and performs them when the queue is empty.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional implementations use the current thread's call stack to store data related to future object completions, then future object completion management is simple, but call stack usage increases leading to stack overflow errors and degraded system performance
Solution Approach 1:
The patent extracts the completion data storage from the call stack and places it in the heap memory through a CompletionContext object. This separation removes the burden from the call stack, preventing stack overflow errors while maintaining the necessary completion management functionality through heap-allocated memory structures.
2Productivity
If a completion queue is introduced to manage future object completions, then call stack usage is reduced, but the system complexity increases
Solution Approach 1:
The CompletionContext object serves as an intermediary between the call stack and the completion queue. It manages the queue on the heap and coordinates completion operations, reducing direct call stack involvement while maintaining structured completion management and improving system performance.
3Loss of information
If multiple linked future objects are processed sequentially on the call stack, then completion notifications are maintained, but the call stack depth increases negatively impacting performance
Solution Approach 1:
The patent transitions from a vertical call stack structure to a horizontal queue structure in heap memory. This dimensional change allows multiple future object completions to be managed in parallel on the heap rather than sequentially on the stack, maintaining notification integrity while improving performance by eliminating stack depth limitations.
Data Source
AI summary
Reducing call stack usage for future object completions is disclosed herein. In one example, a processor device of a computing device employs a completion queue when managing completions of future objects. When a future object is determined to have a status of complete, the processor device determines whether the current thread of the future object is associated with a completion queue. If so, a completion operation of the future object is enqueued in the completion queue. If the current thread is not associated with a completion queue, one is created and associated with the current thread, and the completion operation of the future object is performed. After completion, if the completion queue is not empty, any enqueued completion operations are dequeued and performed. Once the completion queue is empty, the completion queue is removed.