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WSH PVE

Processors Reference

The Processors panel controls the number of vCPUs and the emulated CPU model. Which CPU options are usable depends on the architecture selected for the guest (see the Architecture reference).

CPU model by architecture

Section titled “CPU model by architecture”
Architecture Default machine CPU model
x86_64 i440fx / q35 Full PVE CPU model list (host, kvm64, named Intel/AMD models, custom)
aarch64 virt A CPU model is applied; defaults are provided by the virt machine
sparc SS-5 Not configurable — the machine provides a fixed CPU
sparc64 sun4u Not configurable — the machine provides a fixed CPU

For the SPARC architectures the WSH patches intentionally do not emit a -cpu argument; the selected machine (SS-5 / sun4u) provides its own processor, so the CPU type field is ignored.

SPARC limitations

Section titled “SPARC limitations”

SPARC emulation is sensitive to the guest operating system:

  • sparc32 (SS-5) is usually limited to a single CPU and around 512 MB of RAM, depending on the OS.
  • Installation can be slow and host CPU usage may sit near 100% for the emulated core — this is expected. Pinning the VM to a low-frequency core, or keeping these guests on a test host, avoids reducing performance for other guests.

Further reading

Section titled “Further reading”