Re: [Xen-devel] [PATCH v5] new config option vtsc_tolerance_khz to avoid TSC emulation

[Olaf Hering <olaf@xxxxxxxxx>]

On Thu, Mar 29, Roger Pau Monné wrote:

> AFAICT in the chunk above you will disable vtsc without checking if
> the hardware supports TSC scaling, which leads to inaccurate TSC values
> on hardware that could provide accurate results without the software
> emulation overhead.

Is that really the case? Maybe I get the logic wrong, but what I see is:
what ever my change does, or if a HVM domain runs on a host with scaling
feature, disable vtsc. hvm_get_tsc_scaling_ratio has no side effects.
Isnt the purpose to not emulate vtsc if the hardware supports scaling?

Olaf

Attachment: signature.asc
Description: PGP signature

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel