guiper

/usr/bin/echo 0 > /sys/devices/system/cpu/intel_pstate/no_turbo This one does the trick. For some reason i need to issue it manually at every boot. Even if having on /boot/config/go it doesn't get applied until I execute it.

On Unraid, before passing through the devices though kvm Nvidia LnkCap: Port #0, Speed 8GT/s, Width x16, ASPM unknown, Latency L0 <1us, L1 <4us ClockPM+ Surprise- LLActRep- BwNot- LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+ ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed 8GT/s, Width x16, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- Asmedia controller LnkCap: Port #1, Speed 5GT/s, Width x1, ASPM L0s, Latency L0 <512ns, L1 <2us ClockPM- Surprise- LLActRep- BwNot- LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+ ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed 5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- Worst. Before starting the VM root@Tower:~# lspci -vv | grep LnkSta LnkSta: Speed 8GT/s, Width x16, TrErr- Train- SlotClk+ DLActive- BWMgmt+ ABWMgmt+ LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+, EqualizationPhase1+ LnkSta: Speed unknown, Width x0, TrErr- Train- SlotClk- DLActive- BWMgmt- ABWMgmt- LnkSta: Speed 2.5GT/s, Width x0, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete-, EqualizationPhase1- LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive+ BWMgmt+ ABWMgmt- LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete-, EqualizationPhase1- LnkSta: Speed 5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive+ BWMgmt+ ABWMgmt- LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete-, EqualizationPhase1- LnkSta: Speed 8GT/s, Width x16, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete+, EqualizationPhase1+ LnkSta: Speed 8GT/s, Width x16, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete-, EqualizationPhase1- LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete-, EqualizationPhase1- LnkSta: Speed 5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete-, EqualizationPhase1- After Starting VM root@Tower:~# lspci -vv | grep LnkSta LnkSta: Speed 2.5GT/s, Width x16, TrErr- Train- SlotClk+ DLActive- BWMgmt+ ABWMgmt+ LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+, EqualizationPhase1+ LnkSta: Speed unknown, Width x0, TrErr- Train- SlotClk- DLActive- BWMgmt- ABWMgmt- LnkSta: Speed 2.5GT/s, Width x0, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete-, EqualizationPhase1- LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive+ BWMgmt+ ABWMgmt- LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete-, EqualizationPhase1- LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive+ BWMgmt+ ABWMgmt- LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete-, EqualizationPhase1- LnkSta: Speed 2.5GT/s, Width x16, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete+, EqualizationPhase1+ LnkSta: Speed 2.5GT/s, Width x16, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete-, EqualizationPhase1- LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete-, EqualizationPhase1- LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete-, EqualizationPhase1-

Agree, something is strange, will take a better look at home. Maybe the gpu is at 2.5 for power saving reasons?. Anyway my CPU is an Ivy Bridge (i5-3470), and only one pci express card is used, so it should even use the 16GB/s.

Thanks a lot. Doing lspci -vv guess I have the issue LnkCap: Port #1, Speed 5GT/s, Width x1, ASPM L0s, Latency L0 <512ns, L1 <2us ClockPM- Surprise- LLActRep- BwNot- LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+ ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- I would read that it has capability for 5GT/s but established at 2.5GT/s. This explains the issue. Any suggestions how to move forward? Strangely my Nvidia card (GTX 960) has similar issue.. LnkCap: Port #0, Speed 8GT/s, Width x16, ASPM unknown, Latency L0 <512ns, L1 <4us ClockPM+ Surprise- LLActRep- BwNot- LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+ ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed 2.5GT/s, Width x16, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-

If your mobo is quite old and uses pci-e 1.0 spec, it'll be using one pci-e lane which is around 250MB/s.. so with the overhead of the controller, 205MB/s seems about right. thats my guess anyway. Also worth noting, if your mobo does use pci-e 1.0, installing a 1x card will have the same results performance wise as your onboard controller. you'd need to splash out on a x4 or x8 card. Would probably work out cheaper to get a new motherboard with onboard SATA3. The motherboard is not that old. It's this one http://www.asrock.com/mb/Intel/Z77%20Extreme4-M/, and it's clear in the manual that it should support SATA 3 speeds. Could it be from the bus=pcie.0 when passing through the controller? I can boot this windows into native windows 10, and give a try there, to compare speeds.

Thanks, definitely something weird with my limitation at 200MB/s. Will try to dig deeper later today.

Any chance you can try the performance of one disk alone too see if it can go above the 205MB/s?

04:00.0 SATA controller: ASMedia Technology Inc. ASM1062 Serial ATA Controller (rev 01) (prog-if 01 [AHCI 1.0]) Subsystem: ASRock Incorporation Motherboard Flags: bus master, fast devsel, latency 0, IRQ 29 I/O ports at c050 [size=8] I/O ports at c040 [size=4] I/O ports at c030 [size=8] I/O ports at c020 [size=4] I/O ports at c000 [size=32] Memory at f7800000 (32-bit, non-prefetchable) [size=512] Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit- Capabilities: [78] Power Management version 3 Capabilities: [80] Express Legacy Endpoint, MSI 00 Capabilities: [100] Virtual Channel Kernel driver in use: vfio-pci Kernel modules: ahci Edit: Not stubbing anything, just making sure Unraid doesn't use the disk in this controller.

I had no issues with the first boot or windows install, had issues with reboots. After any guest reboot seabios wouldn't detect any device to boot, had to reboot the host. Enabled some weird option in bios to support legacy boot in the asmedia controller, and working perfectly. Still was expecting more performance, apparently the speed is limited on the controller to the 200MB/s?

No disk section (actually have there the virtio.img iso). <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/mnt/user/Others/Apps/Virtio_Drivers/virtio-win.iso'/> <backingStore/> <target dev='hdb' bus='usb'/> <readonly/> <alias name='usb-disk1'/> </disk> Passing through the controller (had to enable some legacy thing in the bios, else it was flaky). <qemu:arg value='-device'/> <qemu:arg value='vfio-pci,host=04:00.0,bus=pcie.0'/>

Small progress. Bought a new SSD, and decided to give another try. After enabling a legacy boot option on the on "bios" for the Asmedia ASM1061 controller, which comes integrated in my motherboard, manage to pass through that and boot every time from it, without any issues after restarts (using Seabios). Performance is considerably better, but apparently the controller is limiting to 200MB/s and Any thoughts? Still slower than I would expect from Native Windows 10.

You need to disable the hyperv extensions, else Nvidia drivers detects it's a VM and returns error 43. Make sure you have the following section bellow and will be solved. <features> <acpi/> <apic/> <hyperv> <relaxed state='off'/> <vapic state='off'/> <spinlocks state='off'/> </hyperv> <kvm> <hidden state='on'/> </kvm> </features> Hopefully on Unraid 6.2 will be ways to override the nvidia detection and allow hyperv extensions to be enabled.

Have exactly the same issue, but passing through a cheap ASMEDIA ASM1062 integrated in the MB. Works perfectly in the first boot, and managed to boot a pre-installed Windows 10, but upon every guest reboot SEABIOS doesn't find the controller, forcing me the reboot the host. Maybe ejecting the controller on windows reboot could help. I never tried, but just an idea https://www.linuxserver.io/index.php/2013/09/12/xen-4-3-windows-8-with-vga-passthrough-on-arch-linux/. It helped in the past with GPU issues...

Maybe try to get the whole command that libvirt executes, and try to execute qemu command directly bypass libvirt completely. Should work that way.

Have you tried to create a new VM with XML expert option? Not sure if it will help, but worth to try.