<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 class="gmail_signature"><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 class="h5"><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">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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