Power Control Unit Thread Transfer Utilization Metrics
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Solution Overview
Problem
Computer processors face challenges in managing power states effectively during thread transfers, leading to inefficient power usage and performance issues due to inaccurate utilization metrics.
Innovation Solution
A power control unit maintains utilization metrics for processing engines and generates metrics for other engines involved in thread transfers, allowing for dynamic power state adjustments to match the activity level of the thread transfer, ensuring optimal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the processor places processing engines in low power states based on traditional utilization metrics, then power consumption is reduced, but execution performance deteriorates during thread transfers due to inaccurate utilization metrics
Solution Approach 1:
The system implements feedback by monitoring thread transfer events and using this information to adjust utilization metrics dynamically. When a thread transfer is detected, the destination processing engine's utilization metric is updated to reflect the incoming thread's activity, preventing premature transitions to low power states and ensuring performance is maintained during thread transfers.
2Device complexity
If the processor uses static utilization metrics for power management, then power state control is simplified, but accuracy of utilization measurement deteriorates during dynamic thread transfers
Solution Approach 1:
The system applies dynamics by making utilization metrics adaptive rather than static. The utilization metric for a destination processing engine is dynamically adjusted based on thread transfer events, allowing the metric to reflect current activity levels accurately. This dynamic adjustment maintains measurement precision during thread transfers while keeping the power management logic relatively simple.
Data Source
AI summary
In an embodiment, a processor includes multiple processing engines and a power control unit. The power control unit is to: maintain a first utilization metric for a first processing engine; detect a thread transfer from a first processing engine to a second processing engine; and generate, using the first utilization metric for the first processing engine, a second utilization metric for a second processing engine. Other embodiments are described and claimed.