[libvirt] [PATCHv3] Add invariant TSC cpu flag

Eric Blake eblake at redhat.com
Mon Jun 2 20:17:05 UTC 2014


On 05/15/2014 02:31 AM, Ján Tomko wrote:
> Add suport for invariant TSC flag (CPUID 0x80000007, bit 8 of EDX).
> If this flag is enabled, the TSC ticks at a constant rate across
> all ACPI P-, C- and T-states.
> 
> This can be enabled by adding:
> <feature name='invtsc'/>
> to the <cpu> element.
> 
> Migration and saving the domain does not work with this flag.
> 
> QEMU support for this is not merged yet:
> https://lists.gnu.org/archive/html/qemu-devel/2014-04/msg05024.html

In spite of Dan's ack, let's wait until it actually lands in qemu.git
before you push this.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 604 bytes
Desc: OpenPGP digital signature
URL: <http://listman.redhat.com/archives/libvir-list/attachments/20140602/42998bba/attachment-0001.sig>


More information about the libvir-list mailing list