---
name: "pvclock"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/pvclock"
---

# pvclock(4)

paravirtual clock driver

## NAME

**pvclock** – paravirtual clock driver

## SYNOPSIS

**pvclock\* at pvbus?**

## DESCRIPTION

The **pvclock** driver supports the paravirtual clock that is available in KVM and other hypervisors. **pvclock** uses a shared page between the host and the hypervisor to synchronize the TSC clock in an efficient way.

## SEE ALSO

[pvbus(4)](/pvbus/4.md)

## HISTORY

The **pvclock** driver first appeared in OpenBSD 6.5.

## AUTHORS

The **pvclock** driver was written by Reyk Floeter ⟨*reyk@openbsd.org*⟩.