4000μs-16000μs here, its terrible. Tried whats said on https://lime-technology.com/forum/index.php?topic=43126.15 Its a bit better with this: > <vcpu placement='static'>4</vcpu> > <cputune> > <vcpupin vcpu='0' cpuset='4'/> > <vcpupin vcpu='1' cpuset='5'/> > <vcpupin vcpu='2' cpuset='6'/> > <vcpupin vcpu='3' cpuset='7'/> > <emulatorpin cpuset='0-3'/> > </cputune> I tried /isolcpus/ but it did not yield visible benefits. /ndis.sys/ is big offender here but i dont really understand why. Removing network interface from VM makes /usbport.sys/ take over as biggest offender. All this happens with /performance/ governor of all cpu cores: > echo performance | tee > /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor >/dev/null Cores remain clocked at 4k mhz. I dont know what else i could try. Does anyone have any ideas..?
On 2015.10.29 08:03, Eddie Yen wrote: > I tested again with VM reboot, I found that this time is about > 1000~1500μs. > Also I found that it easily get high while hard drive is loading, but > only few times. > > Which specs you're using? Maybe it depends on CPU or patches. > > 2015-10-29 13:44 GMT+08:00 Blank Field <[email protected] > <mailto:[email protected]>>: > > 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. > > On Oct 29, 2015 8:40 AM, "Eddie Yen" <[email protected] > <mailto:[email protected]>> wrote: > > Thanks for information! And sorry I don'r read carefully at > beginning message. > > For my result, I got about 1000μs below and only few times got > 1000μs above when idling. > > I'm using 4820K and used 4 threads to VM, also I set these 4 > threads as 4 cores in VM settings. > The OS is Windows 10. > > 2015-10-29 13:21 GMT+08:00 Blank Field > <[email protected] <mailto:[email protected]>>: > > I think they're using this: > www.thesycon.de/deu/latency_check.shtml > <http://www.thesycon.de/deu/latency_check.shtml> > > On Oct 29, 2015 6:11 AM, "Eddie Yen" > <[email protected] <mailto:[email protected]>> wrote: > > Sorry, but how to check DPC Latency? > > 2015-10-29 10:08 GMT+08:00 Nick Sukharev > <[email protected] <mailto:[email protected]>>: > > I just checked on W7 and I get 3000μs-4000μs one > one of the guests when 3 guests are running. > > On Wed, Oct 28, 2015 at 4:52 AM, Sergey Vlasov > <[email protected] <mailto:[email protected]>> wrote: > > On 27 October 2015 at 18:38, LordZiru > <[email protected] > <mailto:[email protected]>> wrote: > > I have brutal DPC Latency on qemu, no > matter if using pci-assign or vfio-pci or > without any passthrought, > > my DPC Latency is like: > > 10000,500,8000,6000,800,300,12000,9000,700,2000,9000 > and on native windows 7 is like: > 20,30,20,50,20,30,20,20,30 > > > InWindows 10 guest I constantly have red bars > around 3000μs (microseconds), spiking > sometimes up to 10000μs. > > > I don't know how to fix it. > this matter for me because i are using USB > Sound Card for my VMs, > and i get sound drop-outs every 0-4 secounds > > > That bugs me a lot too. I also use an external > USB card and my DAW periodically drops out :( > > I haven't tried CPU pinning yet though. And > perhaps I should try Windows 7. > > > _______________________________________________ > vfio-users mailing list > [email protected] > <mailto:[email protected]> > https://www.redhat.com/mailman/listinfo/vfio-users > > > > _______________________________________________ > vfio-users mailing list > [email protected] <mailto:[email protected]> > https://www.redhat.com/mailman/listinfo/vfio-users > > > > _______________________________________________ > vfio-users mailing list > [email protected] <mailto:[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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