Hello, Using cpuset, i was using the vm with:
Core 0: threads 0 & 4: linux + emulator pin Core 1,2,3: threads 1,2,3,5,6,7: windows I tested with: Core 0: threads 0 & 4: linux Core 1,2,3: threads 1,2,3: windows Core 1,2,3: threads 5,6,7: emulator The difference between both is huge (DPC latency is mush more stable): Performance on single core went up to 50% (cinebench ratio by core from 100 to 150 points) Performance on gpu went up to 20% (cinebench from 80fps to 100+) Performance on "heroes of the storm" went from 20~30 fps to stable 60 (and much time more than 100) (performance of Unigine Heaven went from 2700 points to 3100 points) The only sad thing is that i have the 3 idle threads which are barely used... Is there any way to put them back to windows? -- Deldycke Quentin On 29 December 2015 at 17:38, Michael Bauer <[email protected]> wrote: > 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. > > Best regards > Michael > > > Am 28.12.2015 um 19:30 schrieb rndbit: > > 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 1000~1500 > μs. > 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]>: > >> 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]> 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]> >>> [email protected]>: >>> >>>> I think they're using this: >>>> www.thesycon.de/deu/latency_check.shtml >>>> On Oct 29, 2015 6:11 AM, "Eddie Yen" < <[email protected]> >>>> [email protected]> wrote: >>>> >>>>> Sorry, but how to check DPC Latency? >>>>> >>>>> 2015-10-29 10:08 GMT+08:00 Nick Sukharev < <[email protected]> >>>>> [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]> >>>>>> [email protected]> wrote: >>>>>> >>>>>>> On 27 October 2015 at 18:38, LordZiru < <[email protected]> >>>>>>> [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 >>>>>>>> >>>>>>> >>>>>>> In Windows 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]>[email protected] >>>>>>> <https://www.redhat.com/mailman/listinfo/vfio-users> >>>>>>> https://www.redhat.com/mailman/listinfo/vfio-users >>>>>>> >>>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> vfio-users mailing list >>>>>> [email protected] >>>>>> https://www.redhat.com/mailman/listinfo/vfio-users >>>>>> >>>>>> >>>>> >>>>> _______________________________________________ >>>>> vfio-users mailing list >>>>> [email protected] >>>>> https://www.redhat.com/mailman/listinfo/vfio-users >>>>> >>>>> >>> > > > _______________________________________________ > vfio-users mailing > [email protected]https://www.redhat.com/mailman/listinfo/vfio-users > > > > > _______________________________________________ > vfio-users mailing > [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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