Yes, during my experimentation I made mistakes, when it started to work, I kept it :) On 26 Feb 2016 10:54 am, "Rokas Kupstys" <[email protected]> wrote:
> Hmm what you just wrote i dont understand. > > CONFIG_RCU_NOCB_CPU_ALL=y > > Documentation: > > This option forces all CPUs to be no-CBs CPUs. The rcu_nocbs= boot > parameter will be ignored. > > So at least rcu_nocbs kernel parameter should not be needed as i > understand. Right? > > Still ill try these settings, cant be any worse :) > > On 2016.02.26 11:16, Quentin Deldycke wrote: > > Mainly: > > CONFIG_NO_HZ_FULL=y > CONFIG_RCU_NOCB_CPU_ALL=y > > Using cgroups / cpu pinnning, the cores won't have to handle any kernel > tick, but only run qemu > > For my i7 4790k, i am force to put vm on 3 threads (the main of my 3 > cores). So kernel parameter: > > nohz_full=1,2,3,5,6,7 rcu_nocbs=1,2,3,5,6,7 > > and my vm run on threads 1,2,3 (main thread of cores 1,2,3) > and qemu emulator run on threads 5,6,7 (sub threads of cores 1,2,3) > > Amd cards seems more affected by DPC than nvidia ones. > > Note an interesting thing: > > > http://www.guru3d.com/articles-pages/rise-of-the-tomb-raider-pc-graphics-performance-benchmark-review,9.html > > amd and multi cores is... erratic :) > > -- > Deldycke Quentin > > > On 26 February 2016 at 09:53, Rokas Kupstys <[email protected]> wrote: > >> Could you elaborate on config differences? Still hunting for something >> that could help bringing DPC latency down since VM gaming is no go due to >> that.. >> >> >> On 2016.02.26 10:51, Quentin Deldycke wrote: >> >> For my part: >> >> debian with some experimental package. When new kernel is out, i >> recompile it with some difference in config. >> >> But right now, 4.5 rc4. >> >> No problem with the host since ages. Plasma is buggy but... i think on >> every distro xD >> >> >> -- >> Deldycke Quentin >> >> >> On 26 February 2016 at 09:43, Stein van Broekhoven <[email protected]> >> wrote: >> >>> Dear All, >>> >>> What do you consider the distro of choice for a stable vm gaming build? >>> At the moment I'm on solus because it has 4.4.0 kernel by default and I >>> like the project. >>> Got libvirtd & virsh working with qemu but just can't get passthrough to >>> work as of now. >>> >>> I have a : >>> ASUS SABERTOOTH 990FX v1 with FX-8120 >>> Ati Radeon 6xxx >>> Ati Radeon 5xxx >>> >>> I had it working at some point with ubuntu but that is some time ago and >>> don't remember how. >>> >>> >>> Kind regards, >>> >>> Stein van Broekhoven / System administrator >>> [email protected] >>> >>> _______________________________________________ >>> vfio-users mailing list >>> [email protected] >>> https://www.redhat.com/mailman/listinfo/vfio-users >>> >> >> >> >> _______________________________________________ >> vfio-users mailing >> [email protected]https://www.redhat.com/mailman/listinfo/vfio-users >> >> >> >> _______________________________________________ >> vfio-users mailing list >> [email protected] >> https://www.redhat.com/mailman/listinfo/vfio-users >> >> > > > _______________________________________________ > vfio-users mailing > [email protected]https://www.redhat.com/mailman/listinfo/vfio-users > > > > _______________________________________________ > vfio-users mailing list > [email protected] > https://www.redhat.com/mailman/listinfo/vfio-users > >
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