How to Decode iOS GPU Counter Indices in PerfDog: A Comprehensive Guide

As an iOS developer, optimizing your application's GPU performance is crucial. PerfDog provides a plethora of GPU Counter indices that offer invaluable insights into your app's performance. In this article, we will delve into the descriptions of the GPU General Counter, GPU Memory Counter, and GPU Shader Counter indices to empower you with a better understanding of their significance.

1. Understanding the GPU General Counter

• VertexOccupancy: This index gauges the number of vertex shader simdgroups running concurrently in the GPU, relative to the GPU’s maximum capacity for concurrent simdgroups.
• FragmentOccupancy: Analogously, this index measures the number of fragment shader simdgroups running simultaneously in the GPU, relative to the GPU’s maximum concurrent simdgroups capacity.
• ComputeOccupancy: This index quantifies the number of compute shader simdgroups running concurrently in the GPU, compared to the GPU’s maximum capacity for concurrent simdgroups.

2. Deciphering the GPU Memory Counter

• BufferReadLimiter: This index quantifies the time during which buffer loads are attempted to execute as a percentage of peak buffer load performance.
• TextureSampleLimiter: This index measures the time during which texture samples are attempted to execute as a percentage of peak texture sample performance.
• GpuReadBandwidth: This index quantifies how much memory, in gigabytes per second, the GPU reads from a memory external to the GPU (potentially main memory).
• GpuWriteBandwidth: This index measures how much memory, in gigabytes per second, the GPU writes to a memory external to the GPU (potentially main memory).

3. Unraveling the GPU Shader Counter

• AluLimiter: This index measures the time during which ALU (Arithmetic Logic Unit) work is attempted to execute as a percentage of peak ALU performance.

By comprehending these GPU Counter indices, you can significantly enhance your ability to pinpoint performance bottlenecks and optimize your iOS applications. With PerfDog, you can effectively monitor these indices and gain valuable insights into your application's GPU performance. So, start leveraging these indices today and elevate your iOS application performance to unprecedented levels!