Hi, Timo
If you want to divide CPU resources as you expected,
each vcpu weight should be same.
In your case, you should define xendom1 for 1vcpu
and xendom2 for 2vcpu(s). then after you should pin these vcpus to pcpu0.
Thanks
Atsushi SAKAI
Timo Benk <timo.benk@xxxxxx> wrote:
> Hi,
>
> on my system, it seems that the credit scheduler does not work as expected.
> The
> problem seems to be related to HyperThreading, if i switch off HT in the BIOS
> Setup, the scheduler works as expected.
>
> I have two domains running, both pinned to the same processor:
>
> Domain-0:~ # xm vcpu-list
> Name ID VCPU CPU State Time(s) CPU
> Affinity
> Domain-0 0 0 1 --- 30.2 any cpu
> Domain-0 0 1 1 r-- 12.0 any cpu
> xendom1 1 0 0 --- 98.6 0
> xendom2 2 0 0 r-- 110.3 0
>
> Both domains should consume max. 100 Percent of that processor, but
> xendom1 has a weight twice as big as xendom2:
>
> Domain-0:~ # xm sched-credit -d xendom1
> {'cap': 100, 'weight': 200}
> Domain-0:~ # xm sched-credit -d xendom2
> {'cap': 100, 'weight': 100}
>
> In my understanding of the credit scheduler, xendom1 should get twice as
> much CPU-time as xendom2. But:
>
> xentop - 11:05:46 Xen 3.0.4-0
> Mem: 2612284k total, 2603852k used, 8432k free CPUs: 2 @ 2992MHz
> NAME STATE CPU(sec) CPU(%) [...]
> Domain-0 -----r 42 0.6 [...]
> xendom1 ------ 122 49.8 [...]
> xendom2 -----r 133 50.2 [...]
>
> As you can see, both domains got an equal amount of the CPU.
>
> Am i missing something or do i understand something wrong?
>
> Greetings,
> -timo
> --
> Timo Benk - Jabber ID: fry@xxxxxxxxxxxx - ICQ ID: #414944731
> PGP Public Key: http://m28s01.vlinux.de/timo_benk_gpg_key.asc
>
>
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