[libvirt] [PATCH 6/6] util: Don't report CPU frequency for ARM hosts

Daniel P. Berrange berrange at redhat.com
Mon Dec 11 16:46:51 UTC 2017

On Mon, Dec 11, 2017 at 05:40:36PM +0100, Andrea Bolognani wrote:
> Some ARM platforms, such as the original Raspberry Pi, report the
> CPU frequency in the BogoMIPS field of /proc/cpuinfo, so libvirt
> parsed that field and returned it through its API.
> However, not only many more boards don't report any value there,
> but several - including ARMv8-based server hardware, and even the
> more recent Raspberry Pi 3 - use this field as originally intended:
> to report the BogoMIPS value instead of the CPU frequency.
> Since we have no way of detecting how the field is being used,
> it's better to report no information at all rather than something
> ludicrous like "your shiny 96-core aarch64 virtualization host's
> CPUs are running at a whopping 100 MHz".

Can we perhaps get useful freq data from sysfs instead ? I know my
x86 machines report freq there, but I'm unsure if that reporting
is x86-specific or not.

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