Processor Resource Exhaustion Detection and Remediation

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Solution Overview

Problem

In multi-core processors, resource exhaustion occurs when processor cores overutilize shared resources like last-level cache (LLC) and memory bandwidth, leading to performance degradation for other cores.

Innovation Solution

The implementation of a resource exhaustion detector and a resource controller that monitor platform metrics, detect resource exhaustion conditions, and dynamically manage computing system resources to remediate these conditions by reallocating LLC or memory bandwidth.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If processor cores overutilize shared resources like last-level cache and memory bandwidth, then the utilizing core achieves high resource usage, but other cores experience performance degradation

Engineering Contradiction:

Improveresource usageVSAvoidperformance stability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system implements monitoring of shared resource utilization metrics and provides feedback to the resource manager, which then dynamically adjusts resource allocation to prevent exhaustion and maintain stable performance across all processor cores

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The resource allocation is made dynamic rather than static, allowing the system to adapt resource distribution in real-time based on current utilization patterns and prevent any single core from monopolizing shared resources

Inventive Principle:

Principle #15Dynamics

2Productivity

If shared resources are allocated to multiple processor cores, then overall system resource utilization increases, but resource exhaustion can occur leading to performance degradation

Engineering Contradiction:

Improvesystem resource utilizationVSAvoidresource exhaustion

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary monitoring and detection of resource exhaustion conditions before they fully manifest, allowing proactive reallocation of resources to prevent performance degradation while maintaining high overall utilization

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system changes allocation parameters dynamically based on monitored resource utilization metrics, adjusting the distribution of last-level cache and memory bandwidth to prevent exhaustion while maximizing system-wide productivity

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12326810B2Processor unit resource exhaustion detection and remediation

Publication Date: 2025.06.10 INTEL CORP

AI summary

A performance monitor provides cache miss stall and memory bandwidth usage metric samples to a resource exhaustion detector. The detector can detect the presence of last-level cache and memory bandwidth exhaustion conditions based on the metric samples. If cache miss stalls and memory bandwidth usage are both trending up, the detector reports a memory bandwidth exhaustion condition to a resource controller. If cache miss stalls are trending up and memory bandwidth usage is trending down, the detector reports a last-level cache exhaustion condition to the resource controller. The resource controller can allocate additional last-level cache or memory bandwidth to the processor unit to remediate the resource exhaustion condition. If bandwidth-related metric samples indicate that a processor unit may be overloaded due to receiving high bandwidth traffic, the resource controller can take a traffic rebalancing remedial action.