<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>I thought so...</div><div>I am now giving it a try on arch (manjaro) really like the flexibility from arch combined with fast setup and great tools from manjaro.</div><div><br></div><div>At the moment I am at the point where I have my video card disconnected from the main system and using vfio. </div><div><br></div><div>Now I just need to connect it to my vm. </div><div>If I run the Vm from virt manager it runs as nobody so I'm working on a start script.</div><div>I guess I'll get it working later today. </div><div><br></div><div>If anybody would attempt a build like this I would recommend Manjaro with plasma 5.5 (KDE)</div><div>And follow this guide:</div><div><a href="https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF">https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF</a></div><div>Only difference is:</div><div><span style="background-color: rgba(255, 255, 255, 0);"># mkinitcpio -p linux</span></div><div><span style="background-color: rgba(255, 255, 255, 0);"># mkinitcpio -p linux41</span></div><div><div><br></div><div>You do NOT need the kernel patch from:</div><div><a href="https://aur.archlinux.org/packages/linux-vfio/">https://aur.archlinux.org/packages/linux-vfio/</a></div><div><br></div><div><br><br><div>Sent from my iPhone</div></div>On 28 Feb 2016, at 05:15, Will Marler <<a href="mailto:will@wmarler.com">will@wmarler.com</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">My guess is that "when it started to work, I kept it" sums it up for most people on this list.<div><br></div><div>It certainly sums it up for me! I tried Arch, then Fedora when I struggled with Arch (I tried Fedora b/c Alex's blogs were written from a Fedora angle), then Arch again when I struggled with Fedora on things that I had conquered with Arch the previous time.</div><div><br></div><div><div><br></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Feb 26, 2016 at 4:05 AM, Quentin Deldycke <span dir="ltr"><<a href="mailto:quentindeldycke@gmail.com" target="_blank">quentindeldycke@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">Yes, during my experimentation I made mistakes, when it started to work, I kept it :)</p><div class="HOEnZb"><div class="h5">
<div class="gmail_quote">On 26 Feb 2016 10:54 am, "Rokas Kupstys" <<a href="mailto:rokups@zoho.com" target="_blank">rokups@zoho.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
Hmm what you just wrote i dont understand.<br>
<blockquote type="cite">CONFIG_RCU_NOCB_CPU_ALL=y</blockquote>
Documentation:<br>
<blockquote type="cite">This option forces all CPUs to be no-CBs
CPUs. The rcu_nocbs=
boot parameter will be ignored.</blockquote>
So at least rcu_nocbs kernel parameter should not be needed as i
understand. Right?<br>
<br>
Still ill try these settings, cant be any worse :)<br>
<br>
<div>On 2016.02.26 11:16, Quentin Deldycke
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>
<div>
<div>
<div>
<div>
<div>Mainly:<br>
<br>
CONFIG_NO_HZ_FULL=y<br>
CONFIG_RCU_NOCB_CPU_ALL=y<br>
<br>
</div>
Using cgroups / cpu pinnning, the cores won't have to
handle any kernel tick, but only run qemu<br>
<br>
</div>
For my i7 4790k, i am force to put vm on 3 threads (the
main of my 3 cores). So kernel parameter:<br>
<br>
nohz_full=1,2,3,5,6,7 rcu_nocbs=1,2,3,5,6,7<br>
<br>
</div>
and my vm run on threads 1,2,3 (main thread of cores
1,2,3)<br>
</div>
and qemu emulator run on threads 5,6,7 (sub threads of cores
1,2,3)<br>
<br>
</div>
<div>Amd cards seems more affected by DPC than nvidia ones.<br>
</div>
<div><br>
</div>
Note an interesting thing:<br>
<br>
<a href="http://www.guru3d.com/articles-pages/rise-of-the-tomb-raider-pc-graphics-performance-benchmark-review,9.html" target="_blank">http://www.guru3d.com/articles-pages/rise-of-the-tomb-raider-pc-graphics-performance-benchmark-review,9.html</a><br>
<br>
</div>
amd and multi cores is... erratic :)</div>
<div class="gmail_extra"><br clear="all">
<div>
<div>
<div dir="ltr">--
<div>Deldycke Quentin<br>
</div>
<div>
<div><br>
</div>
</div>
</div>
</div>
</div>
<br>
<div class="gmail_quote">On 26 February 2016 at 09:53, Rokas
Kupstys <span dir="ltr"><<a href="mailto:rokups@zoho.com" target="_blank">rokups@zoho.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> 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..
<div>
<div><br>
<br>
<div>On 2016.02.26 10:51, Quentin Deldycke wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>
<div>
<div>
<div>For my part:<br>
<br>
</div>
debian with some experimental package. When
new kernel is out, i recompile it with some
difference in config.<br>
<br>
</div>
But right now, 4.5 rc4.<br>
<br>
</div>
No problem with the host since ages. Plasma is
buggy but... i think on every distro xD<br>
<br>
</div>
</div>
<div class="gmail_extra"><br clear="all">
<div>
<div>
<div dir="ltr">--
<div>Deldycke Quentin<br>
</div>
<div>
<div><br>
</div>
</div>
</div>
</div>
</div>
<br>
<div class="gmail_quote">On 26 February 2016 at
09:43, Stein van Broekhoven <span dir="ltr"><<a href="mailto:stein@aapjeisbaas.nl" target="_blank"></a><a href="mailto:stein@aapjeisbaas.nl" target="_blank">stein@aapjeisbaas.nl</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear All,<br>
<br>
What do you consider the distro of choice for
a stable vm gaming build?<br>
At the moment I'm on solus because it has
4.4.0 kernel by default and I like the
project.<br>
Got libvirtd & virsh working with qemu but
just can't get passthrough to work as of now.<br>
<br>
I have a :<br>
ASUS SABERTOOTH 990FX v1 with FX-8120<br>
Ati Radeon 6xxx<br>
Ati Radeon 5xxx<br>
<br>
I had it working at some point with ubuntu but
that is some time ago and don't remember how.<br>
<br>
<br>
Kind regards,<br>
<br>
Stein van Broekhoven / System administrator<br>
<a href="mailto:stein@aapjeisbaas.nl" target="_blank">stein@aapjeisbaas.nl</a><br>
<br>
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