Thread Exclusivity Instruction for Serial Graphics Processing
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Solution Overview
Problem
Current graphics processing systems face inefficiencies in executing shader programs due to the lack of mechanisms to ensure serial processing of graphics items, leading to unnecessary resource consumption, particularly in parallel multithreaded environments like modern mobile devices.
Innovation Solution
Incorporating a 'thread exclusivity instruction' in shader programs that allows only a subset of execution threads to execute specific instructions, ensuring that only one thread can proceed at a time, thereby implementing serial processing and reducing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If parallel multithreaded execution is used in graphics processing, then processing throughput is improved, but resource consumption increases and serial processing requirements cannot be met
Solution Approach 1:
The system dynamically switches between parallel and serial execution modes based on the instruction type. Parallel execution is used for general processing to maximize throughput, while serial execution is activated specifically when thread exclusivity instructions are encountered, allowing the system to adapt its behavior to match the actual processing requirements and reduce unnecessary resource consumption
Solution Approach 2:
Instead of forcing all threads to execute serially or all in parallel, the patent applies different execution modes to different instruction segments. Thread exclusivity instructions create localized serial execution regions where only one thread executes at a time, while other instructions continue to execute in parallel, providing local quality control over execution behavior
2Speed
If parallel execution threads are allowed to execute simultaneously, then processing speed is improved, but correctness of serial operations cannot be guaranteed
Solution Approach 1:
Thread exclusivity instructions act as intermediary control mechanisms that mediate between parallel execution threads. These instructions insert serial execution barriers that coordinate thread behavior, ensuring that when serial operations are required, only one thread executes at a time, thereby guaranteeing correctness while allowing parallel execution to proceed elsewhere
3Productivity
If all execution threads execute all instructions, then completeness of processing is ensured, but efficiency is reduced due to unnecessary execution
Solution Approach 1:
The patent implements partial execution where execution threads selectively execute only the instructions relevant to them. Thread exclusivity instructions enable this by allowing threads to skip or sleep during serial execution segments, performing only the partial action needed for their specific data items while maintaining overall processing completeness
Data Source
AI summary
An instruction is included in a program, which instruction causes execution threads of a processor executing the program to determine whether they satisfy a condition which can only be satisfied by a subset of one or more execution threads at any one time. If a thread satisfies the condition, it executes subsequent instructions in the program. Otherwise, the thread sleeps. The subsequent instructions in the program can accordingly be executed by one execution thread subset at a time in serial order.