<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">
  
    
  
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    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>
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              <div>For my part:<br>
                <br>
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              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>
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            <div dir="ltr">--
              <div>Deldycke Quentin<br>
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                <div><br>
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        <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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          </blockquote>
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    </blockquote>
    <br>
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