Atsushi SAKAI wrote:
> 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.
Hm, is that a bug or a feature?
I thought the crdeit-schedulers primary goal was to avoid this pinning nightmare
you have with SEDF?
Greetings,
-timo
> 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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>
>
--
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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