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Coolpad Technology Team
Coolpad Technology Team
Nov 6, 2021 · Mobile Development

Analysis of Intermittent Unresponsive Touch Events in Feishu Caused by Process D State and Memory Compression

The article investigates why the Feishu app sometimes fails to respond to swipe gestures after a hot start, tracing the issue to the app entering a D (uninterruptible) state during memory compression, and demonstrates how adjusting CPU priority for compression threads can reduce the problem's occurrence.

AndroidInput EventsProcess D State
0 likes · 8 min read
Analysis of Intermittent Unresponsive Touch Events in Feishu Caused by Process D State and Memory Compression
Tencent Cloud Developer
Tencent Cloud Developer
Nov 21, 2017 · Mobile Development

Understanding the Android Input Event Flow: From Hardware to Application

The article details Android’s touch‑event pipeline, tracing how a physical press generates a GPIO interrupt, is read by Linux /dev/input drivers, passed through the kernel’s EventHub to the InputManagerService, dispatched by InputDispatcher, routed via WindowManagerService and InputChannel to ViewRootImpl, and finally delivered to the target View, helping developers debug and customize input handling.

AndroidInput EventsMobile Development
0 likes · 11 min read
Understanding the Android Input Event Flow: From Hardware to Application