<div dir="ltr"><div class="gmail_default" style="font-family:comic sans ms,sans-serif">Hello, I've had this problem consistently in both ubuntu server and arch (fresh installs this week). When booting a brand new VM and the win7 iso attached to cdrom, I am getting extremely poor performance. The first 'Windows is loading files...' screen takes about 3 full seconds to fill the progress bar, then starts the bar over and loads VERY slowly. iotop shows the qemu process moving at 1100-1300K/s. </div><div class="gmail_default" style="font-family:comic sans ms,sans-serif">Prior to this week, windows installs would load through the second progress bar part in a matter of seconds. It is now taking almost 4 minutes. I wanted to see if this was a windows iso specific issue (I highly doubt it) and loaded and arch iso. Again, on choosing to load arch install environment iotop reported no higher than 1133K/s, averaging about 1100K/s during the loading. Once in the install shell, I was able to issue a quick speed test (dd if=/dev/cdrom of=/dev/zero bs=1M count=1024) which resulted in about 128M/s. </div><div class="gmail_default" style="font-family:comic sans ms,sans-serif">In qemu monitor, 'info kvm' reports kvm enabled. </div><div class="gmail_default" style="font-family:comic sans ms,sans-serif"> </div><div class="gmail_default" style="font-family:comic sans ms,sans-serif">I've been searching for a solution and my google fu has failed me. Please help! QEMU emulator version 2.3.0 (Debian 1:2.3+dfsg-5ubuntu9.2) </div><div class="gmail_default" style="font-family:comic sans ms,sans-serif">virt-manager version 1.3.2 </div><div class="gmail_default" style="font-family:comic sans ms,sans-serif">VM xml dump: <domain type='kvm'> <name>generic</name> <uuid>0cbed839-7320-4bc7-94f8-53b07f7097b2</uuid> <memory unit='KiB'>1048576</memory> <currentMemory unit='KiB'>1048576</currentMemory> <vcpu placement='static'>3</vcpu> <os> <type arch='x86_64' machine='pc-i440fx-vivid'>hvm</type> <loader readonly='yes' type='pflash'>/usr/share/ovmf/OVMF_CODE-pure-efi.fd</loader> <nvram template='/stor/VM/vars.fd'>/var/lib/libvirt/qemu/nvram/generic_VARS.fd</nvram> <boot dev='cdrom'/> </os> <features> <acpi/> <apic/> <kvm> <hidden state='on'/> </kvm> <vmport state='off'/> </features> <cpu mode='custom' match='exact'> <model fallback='allow'>Haswell</model> </cpu> <clock offset='utc'> <timer name='rtc' tickpolicy='catchup'/> <timer name='pit' tickpolicy='delay'/> <timer name='hpet' present='no'/> <timer name='hypervclock' present='no'/> </clock> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <pm> <suspend-to-mem enabled='no'/> <suspend-to-disk enabled='no'/> </pm> <devices> <emulator>/usr/bin/kvm-spice</emulator> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/stor/Downloads/archlinux-2016.03.01-dual.iso'/> <target dev='hda' bus='ide'/> <readonly/> <address type='drive' controller='0' bus='0' target='0' unit='0'/> </disk> <controller type='usb' index='0' model='ich9-ehci1'> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x7'/> </controller> <controller type='usb' index='0' model='ich9-uhci1'> <master startport='0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0' multifunction='on'/> </controller> <controller type='usb' index='0' model='ich9-uhci2'> <master startport='2'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x1'/> </controller> <controller type='usb' index='0' model='ich9-uhci3'> <master startport='4'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x2'/> </controller> <controller type='pci' index='0' model='pci-root'/> <controller type='ide' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <controller type='virtio-serial' index='0'> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </controller> <serial type='pty'> <target port='0'/> </serial> <console type='pty'> <target type='serial' port='0'/> </console> <channel type='spicevmc'> <target type='virtio' name='com.redhat.spice.0'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> </channel> <input type='mouse' bus='ps2'/> <input type='keyboard' bus='ps2'/> <graphics type='spice' autoport='yes'> <image compression='off'/> </graphics> <video> <model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <redirdev bus='usb' type='spicevmc'> </redirdev> <redirdev bus='usb' type='spicevmc'> </redirdev> <memballoon model='virtio'> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> </memballoon> </devices> </domain> </div><div class="gmail_default" style="font-family:comic sans ms,sans-serif">~/.cache/virt-manager/virt-manager.log: </div><div class="gmail_default" style="font-family:comic sans ms,sans-serif">[Mon, 04 Apr 2016 19:10:59 virt-manager 3975] DEBUG (choosecd:64) Closing media chooser [Mon, 04 Apr 2016 19:10:59 virt-manager 3975] DEBUG (connection:754) domain lifecycle event: domain=generic event=0 reason=1 [Mon, 04 Apr 2016 19:11:01 virt-manager 3975] DEBUG (engine:1157) Starting vm 'generic' [Mon, 04 Apr 2016 19:11:01 virt-manager 3975] DEBUG (connection:754) domain lifecycle event: domain=generic event=4 reason=0 [Mon, 04 Apr 2016 19:11:01 virt-manager 3975] DEBUG (connection:754) domain lifecycle event: domain=generic event=2 reason=0 [Mon, 04 Apr 2016 19:11:01 virt-manager 3975] DEBUG (console:667) Starting connect process for proto=spice trans= connhost=127.0.0.1 connuser= connport= gaddr=127.0.0.1 gport=5900 gtlsport=None gsocket=None [Mon, 04 Apr 2016 19:11:01 virt-manager 3975] DEBUG (console:790) Viewer connected [Mon, 04 Apr 2016 19:18:32 virt-manager 3975] DEBUG (engine:1127) Destroying vm 'generic' [Mon, 04 Apr 2016 19:18:32 virt-manager 3975] DEBUG (console:771) Viewer disconnected [Mon, 04 Apr 2016 19:18:32 virt-manager 3975] DEBUG (connection:754) domain lifecycle event: domain=generic event=5 reason=1 </div><div class="gmail_default" style="font-family:comic sans ms,sans-serif">/var/log/libvirt/qemu/generic.log: 2016-04-05 02:11:01.496+0000: starting up libvirt version: 1.2.16, package: 1.2.16-2ubuntu11.15.10.3, qemu version: 2.3.0 (Debian 1:2.3+dfsg-5ubuntu9.2) LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin QEMU_AUDIO_DRV=spice /usr/bin/kvm-spice -name generic -S -machine pc-i440fx-vivid,accel=kvm,usb=off,vmport=off -cpu Haswell,kvm=off -drive file=/usr/share/ovmf/OVMF_CODE-pure-efi.fd,if=pflash,format=raw,unit=0,readonly=on -drive file=/var/lib/libvirt/qemu/nvram/generic_VARS.fd,if=pflash,format=raw,unit=1 -m 1024 -realtime mlock=off -smp 3,sockets=3,cores=1,threads=1 -uuid 0cbed839-7320-4bc7-94f8-53b07f7097b2 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/generic.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc,driftfix=slew -global kvm-pit.lost_tick_policy=discard -no-hpet -no-shutdown -global PIIX4_PM.disable_s3=1 -global PIIX4_PM.disable_s4=1 -boot strict=on -device ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x4.0x7 -device ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x4 -device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x4.0x1 -device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x4.0x2 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x3 -drive file=/stor/Downloads/archlinux-2016.03.01-dual.iso,if=none,id=drive-ide0-0-0,readonly=on,format=raw -device ide-cd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev spicevmc,id=charchannel0,name=vdagent -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0 -spice port=5900,addr=127.0.0.1,disable-ticketing,image-compression=off,seamless-migration=on -device qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,vgamem_mb=16,bus=pci.0,addr=0x2 -chardev spicevmc,id=charredir0,name=usbredir -device usb-redir,chardev=charredir0,id=redir0 -chardev spicevmc,id=charredir1,name=usbredir -device usb-redir,chardev=charredir1,id=redir1 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 -msg timestamp=on Domain id=16 is tainted: high-privileges char device redirected to /dev/pts/3 (label charserial0) main_channel_link: add main channel client main_channel_handle_parsed: net test: latency 0.095000 ms, bitrate 30567164179 bps (29151.119403 Mbps) inputs_connect: inputs channel client create red_dispatcher_set_cursor_peer: qemu: terminating on signal 15 from pid 644 2016-04-05 02:18:32.677+0000: shutting down </div></div>