RSS-Based Memory Monitoring for Low-Overhead PSS and USS Estimation

Solution Overview

Problem

Existing memory monitoring methods incur high resource overheads, leading to issues such as freezing and overheating in terminal devices due to frequent polling of proportional set size (PSS) or unique set size (USS) of processes.

Innovation Solution

Obtain the resident set size (RSS) directly and use a preset correction value to determine PSS or USS, reducing the need for direct polling and minimizing resource overheads.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If PSS or USS is polled frequently to obtain real-time memory monitoring results, then measurement precision is improved, but resource overhead increases causing device freezing and overheating

Engineering Contradiction:

Improvereal-time memory monitoring accuracyVSAvoidresource overhead

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent pre-calculates and stores the difference values between PSS/RSS and USS/RSS relationships in advance. During monitoring, instead of calculating PSS or USS from scratch through resource-intensive operations, the system directly retrieves these pre-computed difference values and applies them to the currently obtained RSS to quickly derive PSS or USS estimates, thus reducing real-time computational overhead while maintaining measurement accuracy.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent creates a simplified model by copying the essential relationship patterns between memory metrics (PSS-RSS and USS-RSS differences) without replicating the full complexity of original memory calculation mechanisms. These copied difference values are stored in a lookup structure, allowing the system to replicate accurate memory measurement results through simple arithmetic operations rather than complex memory analysis, significantly reducing resource consumption during frequent monitoring operations.

Inventive Principle:

Principle #26Copying

2Measurement precision

If PSS or USS is polled frequently to obtain real-time memory monitoring results, then measurement precision is improved, but device stability deteriorates due to freezing and overheating

Engineering Contradiction:

Improvereal-time memory monitoring accuracyVSAvoiddevice stability

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent pre-calculates and stores the difference values between PSS/RSS and USS/RSS relationships in advance. During monitoring, instead of calculating PSS or USS from scratch through resource-intensive operations, the system directly retrieves these pre-computed difference values and applies them to the currently obtained RSS to quickly derive PSS or USS estimates, thus reducing real-time computational overhead while maintaining measurement accuracy.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent creates a simplified model by copying the essential relationship patterns between memory metrics (PSS-RSS and USS-RSS differences) without replicating the full complexity of original memory calculation mechanisms. These copied difference values are stored in a lookup structure, allowing the system to replicate accurate memory measurement results through simple arithmetic operations rather than complex memory analysis, significantly reducing resource consumption during frequent monitoring operations.

Inventive Principle:

Principle #26Copying

3Device complexity

If RSS is obtained and PSS/USS is calculated directly without using correction values, then device complexity is reduced, but measurement precision decreases

Engineering Contradiction:

Improvemonitoring method simplicityVSAvoidmemory size accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent pre-calculates and stores the difference values between PSS/RSS and USS/RSS relationships in advance. During monitoring, instead of calculating PSS or USS from scratch through resource-intensive operations, the system directly retrieves these pre-computed difference values and applies them to the currently obtained RSS to quickly derive PSS or USS estimates, thus reducing real-time computational overhead while maintaining measurement accuracy.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent creates a simplified model by copying the essential relationship patterns between memory metrics (PSS-RSS and USS-RSS differences) without replicating the full complexity of original memory calculation mechanisms. These copied difference values are stored in a lookup structure, allowing the system to replicate accurate memory measurement results through simple arithmetic operations rather than complex memory analysis, significantly reducing resource consumption during frequent monitoring operations.

Inventive Principle:

Principle #26Copying

Data Source

PatentEP4647918A1Memory monitoring method and apparatus

Publication Date: 2025.11.12 HUAWEI TECH CO LTD

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AI summary

This application discloses a memory monitoring method and apparatus, and relates to the communication field. The memory monitoring method includes: obtaining a first resident set size RSS occupied by a process; and determining, based on the first RSS, first memory including a first PSS and/or a first USS. Resource overheads during monitoring by using the memory monitoring method are low, so that smooth running of a terminal device can be ensured.