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I noticed that attaching a DVD-Drive from the host leads to HUGE
delays. I had attached my /dev/sr0 to the guest and even without a
DVD in the drive this was causing huge lag about once per second.<br>
<br>
Best regards<br>
Michael<br>
<br>
<div class="moz-cite-prefix">Am 28.12.2015 um 19:30 schrieb rndbit:<br>
</div>
<blockquote cite="mid:56817FCC.6040004@sysret.net" type="cite">
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
4000μs-16000μs here, its terrible.<br>
Tried whats said on <a moz-do-not-send="true"
class="moz-txt-link-freetext"
href="https://lime-technology.com/forum/index.php?topic=43126.15">https://lime-technology.com/forum/index.php?topic=43126.15</a><br>
Its a bit better with this:<br>
<blockquote type="cite"> <vcpu
placement='static'>4</vcpu><br>
<cputune><br>
<vcpupin vcpu='0' cpuset='4'/><br>
<vcpupin vcpu='1' cpuset='5'/><br>
<vcpupin vcpu='2' cpuset='6'/><br>
<vcpupin vcpu='3' cpuset='7'/><br>
<emulatorpin cpuset='0-3'/><br>
</cputune></blockquote>
I tried <i>isolcpus</i> but it did not yield visible benefits. <i>ndis.sys</i>
is big offender here but i dont really understand why. Removing
network interface from VM makes <i>usbport.sys</i> take over as
biggest offender. All this happens with <i>performance</i>
governor of all cpu cores:<br>
<blockquote type="cite">echo performance | tee
/sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
>/dev/null</blockquote>
Cores remain clocked at 4k mhz. I dont know what else i could try.
Does anyone have any ideas..?<br>
<br>
<div class="moz-cite-prefix">On 2015.10.29 08:03, Eddie Yen wrote:<br>
</div>
<blockquote
cite="mid:CAHZFSBrRf+wQak=5acwzvpHSteV7+h=2RjmGucm=iTBkB=ANUQ@mail.gmail.com"
type="cite">
<div dir="ltr">I tested again with VM reboot, I found that this
time is about 1000~1500<span
style="font-size:12.8000001907349px">μs.</span><br>
<div><span style="font-size:12.8000001907349px">Also I found
that it easily get high while hard drive is loading, but
only few times.</span></div>
<div><br>
</div>
<div><span style="font-size:12.8000001907349px">Which specs
you're using? Maybe it depends on CPU or patches.</span></div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">2015-10-29 13:44 GMT+08:00 Blank
Field <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:ihatethisfield@gmail.com" target="_blank">ihatethisfield@gmail.com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<p dir="ltr">If i understand it right, this software has a
fixed latency error of 1 ms(1000us) in windows 8-10 due
to different kernel timer implementation. So i guess
your latency is very good.</p>
<div class="HOEnZb">
<div class="h5">
<div class="gmail_quote">On Oct 29, 2015 8:40 AM,
"Eddie Yen" <<a moz-do-not-send="true"
href="mailto:missile0407@gmail.com"
target="_blank">missile0407@gmail.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 dir="ltr">Thanks for information! And sorry I
don'r read carefully at beginning message.
<div><br>
</div>
<div>For my result, I got about 1000<span
style="font-size:12.8000001907349px">μs
below and only few times got 1000</span><span
style="font-size:12.8000001907349px">μs
above when idling.</span></div>
<div><span style="font-size:12.8000001907349px"><br>
</span></div>
<div><span style="font-size:12.8000001907349px">I'm
using 4820K and used 4 threads to VM, also
I set these 4 threads as 4 cores in VM
settings.</span></div>
<div><span style="font-size:12.8000001907349px">The
OS is Windows 10.</span></div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">2015-10-29 13:21
GMT+08:00 Blank Field <span dir="ltr"><<a
moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:ihatethisfield@gmail.com"><a class="moz-txt-link-abbreviated" href="mailto:ihatethisfield@gmail.com">ihatethisfield@gmail.com</a></a>></span>:<br>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px
#ccc solid;padding-left:1ex">
<p dir="ltr">I think they're using this:<br>
<a moz-do-not-send="true"
href="http://www.thesycon.de/deu/latency_check.shtml"
target="_blank">www.thesycon.de/deu/latency_check.shtml</a></p>
<div>
<div>
<div class="gmail_quote">On Oct 29, 2015
6:11 AM, "Eddie Yen" <<a
moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:missile0407@gmail.com"><a class="moz-txt-link-abbreviated" href="mailto:missile0407@gmail.com">missile0407@gmail.com</a></a>>
wrote:<br type="attribution">
<blockquote class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex">
<div dir="ltr">Sorry, but how to
check DPC Latency?</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">2015-10-29
10:08 GMT+08:00 Nick Sukharev <span
dir="ltr"><<a
moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:nicksukharev@gmail.com"><a class="moz-txt-link-abbreviated" href="mailto:nicksukharev@gmail.com">nicksukharev@gmail.com</a></a>></span>:<br>
<blockquote class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex">
<div dir="ltr">I just checked
on W7 and I get <span
style="font-size:12.8px">3000</span><span
style="font-size:12.8px">μs-4000</span><span
style="font-size:12.8px">μs
one one of the guests when
3 guests are running.</span></div>
<div class="gmail_extra"><br>
<div class="gmail_quote">
<div>
<div>On Wed, Oct 28,
2015 at 4:52 AM,
Sergey Vlasov <span
dir="ltr"><<a
moz-do-not-send="true"
class="moz-txt-link-abbreviated" href="mailto:sergey@vlasov.me"><a class="moz-txt-link-abbreviated" href="mailto:sergey@vlasov.me">sergey@vlasov.me</a></a>></span>
wrote:<br>
</div>
</div>
<blockquote
class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px
#ccc
solid;padding-left:1ex">
<div>
<div>
<div dir="ltr">
<div
class="gmail_extra">
<div
class="gmail_quote"><span>On
27 October
2015 at 18:38,
LordZiru <span
dir="ltr"><<a
moz-do-not-send="true" class="moz-txt-link-abbreviated"
href="mailto:lordziru@gmail.com"><a class="moz-txt-link-abbreviated" href="mailto:lordziru@gmail.com">lordziru@gmail.com</a></a>></span>
wrote:<br>
<blockquote
class="gmail_quote"
style="margin:0px
0px 0px
0.8ex;border-left:1px
solid
rgb(204,204,204);padding-left:1ex">
<div dir="ltr">
<div>I have
brutal DPC
Latency on
qemu, no
matter if
using
pci-assign or
vfio-pci or
without any
passthrought,
<br>
</div>
<br>
my DPC Latency
is like:<br>
<div>10000,500,8000,6000,800,300,12000,9000,700,2000,9000<br>
</div>
<div>and on
native windows
7 is like: <br>
20,30,20,50,20,30,20,20,30<br>
</div>
</div>
</blockquote>
<div> </div>
</span>In<span>
Windows 10
guest I
constantly
have red bars
around 3000</span><span><span>μ</span>s
(microseconds),
spiking
sometimes up
to 10000</span><span><span>μ</span>s</span>.<span><br>
<div><span><br>
</span></div>
<blockquote
class="gmail_quote"
style="margin:0px
0px 0px
0.8ex;border-left:1px
solid
rgb(204,204,204);padding-left:1ex">
<div dir="ltr">
<div><br>
I don't know
how to fix it.<br>
</div>
<div>this
matter for me
because i are
using USB
Sound Card for
my VMs, <br>
and i get
sound
drop-outs
every 0-4
secounds<br>
</div>
<div><br>
</div>
</div>
</blockquote>
<div><br>
</div>
</span>
<div>That bugs
me a lot too.
I also use an
external USB
card and my
DAW
periodically
drops out :(<br>
<br>
I haven't
tried CPU
pinning yet
though. And
perhaps I
should try
Windows 7.<br>
</div>
</div>
<br>
</div>
</div>
<br>
</div>
</div>
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