DA0004: High processor usage

Applies to: Visual Studio Visual Studio for Mac

Note

This article applies to Visual Studio 2017. If you're looking for the latest Visual Studio documentation, see Visual Studio documentation. We recommend upgrading to the latest version of Visual Studio. Download it here

Item	Value
Rule Id	DA0004
Category	Profiling Tools Usage
Profiling methods	Instrumentation Sampling
Message	Your processor usage is consistently above 75%. Consider using Sampling mode for CPU-bound applications.
Rule type	Information

When you profile by using the sampling, .NET memory, or resource contention methods, you must collect at least 10 samples to trigger this rule.

Cause

Processor (CPU) utilization was high in profiling data that was collected using the instrumentation method. Consider using the sampling profiling method when profiling a CPU bound application.

Rule description

During this profiling run, the processor (or processors) was consistently busy. High CPU utilization can indicate a CPU-bound application. Instrumented profiles are not the most effective way to investigate CPU-usage scenarios. Sampling is more effective when you are profiling applications that spend much of their time executing instructions on the processor.

How to fix violations

Consider profiling your application again using the sampling method instead of instrumentation method unless you require function timings or you are more interested in understanding input/output than processor bottlenecks.