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Re: [vfio-users] Eliminate Mini Stutter in "Witcher 3: The Wild Hunt" on top of KVM/VFIO



On Wed, Mar 16, 2016 at 11:37 AM, Alex Williamson <alex l williamson gmail com> wrote:
..
The Fedora kernel already sets all of these, however regarding 3) the advice from nbhs is to use hugetlbfs and not rely on transparent hugepages.  Transparent hugepages is not compatible with device assignment since pages get pinned as the VM is created, there's no opportunity for transparent hugepages to take effect.  Therefore I don't think your madvise change is doing anything.

Hi Alex,

Actually I enable the madvise since from the description it could create a more efficient memory usage when using transparent hugepages. But yeah, you were right I just noticed that nbhs only adviced to use hugetlbfs (which I already had in my config) thus I'm not using transparent hugepages at all for the VM.

Can you enlighten me on how those 2 kernel configurations can eliminate the mini stutters? The thing is that the mini stutters only happens on Witcher 3, and after applying those config the game is very fluid.

Thank you.

Best regards,
Okky Hendriansyah

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