L3 Cache Allocation for Faster Foreground Application Launch
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Solution Overview
Problem
The launch time of foreground applications on electronic devices is prolonged due to contention for shared cache resources with background applications, leading to a poor user experience.
Innovation Solution
Allocate a fixed size of the shared cache to foreground applications of a specific type, determined using a white list or mapping relationship, to avoid contention and reduce launch time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If background applications are allowed to run simultaneously, then application diversity and user functionality are improved, but foreground application launch time increases due to cache contention
Solution Approach 1:
The shared cache is segmented into dedicated portions for foreground applications and background applications. The memory management unit divides the cache space based on application priority and type, allowing foreground applications to access a dedicated cache region without interference from background applications, thus reducing launch time while maintaining background application functionality
Solution Approach 2:
Different cache allocation strategies are applied to different application types. Foreground applications receive guaranteed cache space with higher priority, while background applications operate with lower priority or dynamic allocation. This local differentiation in cache quality and access rights resolves the contradiction between supporting diverse applications and maintaining fast launch times
2Loss of time
If a fixed shared cache is allocated to a foreground application, then launch time is reduced by avoiding cache contention, but cache resource utilization efficiency decreases
Solution Approach 1:
The cache allocation system dynamically adjusts cache space distribution based on application characteristics, current system state, and workload demands. The memory management unit monitors cache usage patterns and reconfigures allocation in real-time, providing fixed cache guarantees for launch-critical applications while allowing flexible reallocation for other applications, thus balancing launch time improvement with overall resource utilization efficiency
Solution Approach 2:
Cache allocation parameters such as size, priority, and access rights are changed based on application type and system conditions. The system modifies cache configuration dynamically - allocating larger fixed portions to foreground applications needing fast launch while reducing or making dynamic the portions allocated to background applications, thereby optimizing both launch performance and overall resource utilization
Data Source
AI summary
This application provides an application launching method. After receiving a launch operation performed by a user on a first application, an electronic device launches the first application in response to the launch operation. During launching of the first application, the electronic device may use a sensitivity curve corresponding to the first application to determine a target occupancy corresponding to the first application, where the sensitivity curve corresponding to the first application identifies a mapping relationship between an occupancy of an L3 cache attributable to the first application and an IPC of the first application, and the target occupancy represents a minimum occupancy of the L3 cache that corresponds to a highest IPC. The first application may allocate the L3 cache of a corresponding size to the first application based on the target occupancy to continue launching the first application based on the L3 cache allocated to the first application.