Windows 10 very slow with OVMF

[Alex Austin]

Debian Buster

Kernel 4.19.0-9-amd64
qemu-kvm 1:3.1+dfsg-8+deb10u5
ovmf 0~20181115.85588389-3+deb10u1

Machine: Thinkpad T470, i7-7500u, 20GB RAM
VM: 4 CPUs, 8GB RAM, Broadwell-noTSX CPU Model

Windows 10, under this VM, seems to be exceedingly slow with all operations. This is a clean install with very few services running. Task Manager can take 30% CPU looking at an idle system.

[Alex Austin (circuitsoft)]

# dmidecode 3.2
Getting SMBIOS data from sysfs.
SMBIOS 3.0.0 present.
Table at 0x9A694000.

...

Handle 0x000A, DMI type 4, 48 bytes
Processor Information
        Socket Designation: U3E1
        Type: Central Processor
        Family: Core i7
...
        Core Count: 2
        Core Enabled: 2
        Thread Count: 4
        Characteristics:
                64-bit capable
                Multi-Core
                Hardware Thread
                Execute Protection
                Enhanced Virtualization
                Power/Performance Control

Handle 0x000B, DMI type 0, 24 bytes
BIOS Information
        Vendor: LENOVO
        Version: N1QET88W (1.63 )
        Release Date: 04/22/2020
        Address: 0xE0000
        Runtime Size: 128 kB
        ROM Size: 16 MB
        Characteristics:
                PCI is supported
                PNP is supported
                BIOS is upgradeable
                BIOS shadowing is allowed
                Boot from CD is supported
                Selectable boot is supported
                EDD is supported
                3.5"/720 kB floppy services are supported (int 13h)
                Print screen service is supported (int 5h)
                8042 keyboard services are supported (int 9h)
                Serial services are supported (int 14h)
                Printer services are supported (int 17h)
                CGA/mono video services are supported (int 10h)
                ACPI is supported
                USB legacy is supported
                BIOS boot specification is supported
                Targeted content distribution is supported
                UEFI is supported
        BIOS Revision: 1.63
        Firmware Revision: 1.35

[Laszlo Ersek (Red Hat) (lersek)]

Sorry, no input from me. OVMF is apparently from November 2018, and QEMU is version 3.1. Please try to reproduce with recent upstream components (build both OVMF and QEMU from source), and if the issue persists, please provide the complete QEMU command line, capture the OVMF debug log (see OvmfPkg/README for instructions on that), and please also provide the host CPU characteristics (/proc/cpuinfo, /sys/module/kvm_*/parameters/*).

[Alex Austin (circuitsoft)]

I did try the most recent OVMF from QEMU 5.0 (https://git.qemu.org/?p=qemu.git;a=blob_plain;f=pc-bios/edk2-x86_64-code.fd.bz2;hb=fdd76fecdde) and there was no difference.

I will re-build qemu sometime soon.

=======
$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 142
model name : Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz
stepping : 9
microcode : 0xca
cpu MHz : 659.478
cache size : 4096 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 2
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 22
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb invpcid_single pti ssbd ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid mpx rdseed adx smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp md_clear flush_l1d
bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit srbds
bogomips : 5808.00
clflush size : 64
cache_alignment : 64
address sizes : 39 bits physical, 48 bits virtual
power management:

=======
$ grep . /sys/module/kvm_*/parameters/*
/sys/module/kvm_intel/parameters/emulate_invalid_guest_state:Y
/sys/module/kvm_intel/parameters/enable_apicv:N
/sys/module/kvm_intel/parameters/enable_shadow_vmcs:N
/sys/module/kvm_intel/parameters/enlightened_vmcs:N
/sys/module/kvm_intel/parameters/ept:Y
/sys/module/kvm_intel/parameters/eptad:Y
/sys/module/kvm_intel/parameters/fasteoi:Y
/sys/module/kvm_intel/parameters/flexpriority:Y
/sys/module/kvm_intel/parameters/nested:N
/sys/module/kvm_intel/parameters/ple_gap:128
/sys/module/kvm_intel/parameters/ple_window:4096
/sys/module/kvm_intel/parameters/ple_window_grow:2
/sys/module/kvm_intel/parameters/ple_window_max:4294967295
/sys/module/kvm_intel/parameters/ple_window_shrink:0
/sys/module/kvm_intel/parameters/pml:Y
/sys/module/kvm_intel/parameters/preemption_timer:Y
/sys/module/kvm_intel/parameters/unrestricted_guest:Y
/sys/module/kvm_intel/parameters/vmentry_l1d_flush:cond
/sys/module/kvm_intel/parameters/vnmi:Y
/sys/module/kvm_intel/parameters/vpid:Y

[Laszlo Ersek (Red Hat) (lersek)]

Inactive for more than a month, significant amount of info was not provided. Closing.