> I am wondering when using -smp 16 and --enable-kvm at the same time
> (while the host has 4 cores), what will happen?
"-smp 16" will lauch 16 virtual cpu threads, and "--enable-kvm" means
you run those threads on physical cpus *at the same time*. How 16 virtual
cpu threads are scheduled on 4 p
I am wondering when using -smp 16 and --enable-kvm at the same time
(while the host has 4 cores), what will happen?
在 2011年11月8日 下午9:08，陳韋任 写道：
>> so qemu exposes multiple processors to the guest os by having multiple
>> vCPUs. and it realizes the multiple vCPUs by either using RR on a
>> single
now question is if one of the cpu vmexits the guest due to trapping
instruction ( i.e. PIO), the host linux will have only one physical
cpu to run on as the other cpus are still running the guest os ? Am I
right ?
Thanks
Xin
2011/11/8 Xin Tong :
> so qemu exposes multiple processors to the gues
> so qemu exposes multiple processors to the guest os by having multiple
> vCPUs. and it realizes the multiple vCPUs by either using RR on a
> single host cpu (qemu ) or using multiple host cpus (kvm).
yes.
Regards,
chenwj
--
Wei-Ren Chen (陳韋任)
Computer Systems Lab, Institute of Information S
so qemu exposes multiple processors to the guest os by having multiple
vCPUs. and it realizes the multiple vCPUs by either using RR on a
single host cpu (qemu ) or using multiple host cpus (kvm).
Thanks
Xin
2011/11/8 Stefan Hajnoczi :
> On Tue, Nov 8, 2011 at 12:10 PM, 陳韋任 wrote:
>> On Tue, No
On Tue, Nov 8, 2011 at 12:10 PM, 陳韋任 wrote:
> On Tue, Nov 08, 2011 at 08:04:44PM +0800, 陳韋任 wrote:
>> > I am wondering that when one uses qemu with kvm. How many cores are
>> > exposed and available to the guest os ( assuming the host has 4 cores
>> > ). is this configurable ?
>>
>> QEMU provide
On Tue, Nov 08, 2011 at 08:04:44PM +0800, 陳韋任 wrote:
> > I am wondering that when one uses qemu with kvm. How many cores are
> > exposed and available to the guest os ( assuming the host has 4 cores
> > ). is this configurable ?
>
> QEMU provides "-smp" option, but those virtual cpus are schedul
> I am wondering that when one uses qemu with kvm. How many cores are
> exposed and available to the guest os ( assuming the host has 4 cores
> ). is this configurable ?
QEMU provides "-smp" option, but those virtual cpus are scheduled in
round-robin fashion. In other words, it's not real parall
I am wondering that when one uses qemu with kvm. How many cores are
exposed and available to the guest os ( assuming the host has 4 cores
). is this configurable ?
Thanks
Xin
