[vfio-users] Optimize vm and host performance, is dual xeon the way ?

[Eddie Yen]

Pining CPU can reduce the happening that host and guest using the same
thread at the same time.

And I don't know which program you're using on Fedora, so I don't have
quite answer that 2 threads is enough for host or not.
It's all depends on your usage case.

2015-12-26 19:44 GMT+08:00 thibaut noah <thibaut.noah at gmail.com>:

> My cpu is a i7 4790k, is pinning the cpu usefull ? I'll try to derp a bit
> with the vcpu thing, just afraid 2 threads aren't enough for fedora :/
>
> 2015-12-26 11:59 GMT+01:00 Eddie Yen <missile0407 at gmail.com>:
>
>> I forgot your CPU type, so I don't know about your case.
>>
>> But, as I'm using 4820K, I usually using 4 to 6 threads gave to VM, only
>> use 2 threads for Fedora host.
>> And most important is vCPU tweaks, especially CPU topology and Hyper-V.
>>
>> For me, I usually set topology as "sockets=1 cores=6 threads=1" if using
>> 6 threads from host.
>> Then set cpuset= to let vCPU worked on pointed CPU threads.
>>
>> IME, set all threads as vCPU cores can got better performance on Windows
>> 10.
>>
>> 2015-12-26 18:00 GMT+08:00 thibaut noah <thibaut.noah at gmail.com>:
>>
>>> Hello guys merry christmas ! o/
>>> My current issue is vm and host optimization, i use my windows 10 vm for
>>> gaming purposes only (like most of us i think), problem is, to keep my
>>> performances on windows high i drain too much ressources on my fedora host
>>> thus making it almost useless (also when leaving the vm i most of the time
>>> found myself unable to use fedora at all so i have to reboot...).
>>> So is it possible to improve performances to the max on the guest
>>> without almost killing the host ?
>>> Should i consider switching my gear for a bi-xeon? (to assign one fully
>>> to the host and one to the guest)
>>> I'm actually not sure about what happen here, does anyone ran into the
>>> same sort of issue?
>>> Have a good day
>>>
>>> _______________________________________________
>>> vfio-users mailing list
>>> vfio-users at redhat.com
>>> https://www.redhat.com/mailman/listinfo/vfio-users
>>>
>>>
>>
>
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