Generally available: You can use the performance monitoring unit (PMU) to monitor low-level CPU events and metrics in VMs that use a C4 machine type

## Feature **Generally available**: You can use the performance monitoring unit (PMU) to monitor low-level CPU events and metrics in VMs that use a C4 machine type. Using the PMU is helpful to analyze and optimize the performance of the software running on your VM when running performance-sensitive workloads, such as high-performance computing (HPC) or machine learning (ML) workloads. For more information, see the following pages: * [PMU overview](https://cloud.google.com/compute/docs/pmu-overview) * [Enable the PMU in VMs](https://cloud.google.com/compute/docs/enable-pmu-in-vms) * [Manage the PMU in VMs](https://cloud.google.com/compute/docs/manage-pmu-in-vms)