[Bug 1886602] Re: Windows 10 very slow with OVMF

From: Alex Austin <1886602@bugs.launchpad.net>
To: qemu-devel@nongnu.org
Subject: [Bug 1886602] Re: Windows 10 very slow with OVMF
Date: Wed, 08 Jul 2020 23:36:22 -0000	[thread overview]
Message-ID: <159425138304.26885.1674346626863488567.malone@wampee.canonical.com> (raw)
In-Reply-To: 159408874500.32011.1427435858163411654.malonedeb@gac.canonical.com

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

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https://bugs.launchpad.net/bugs/1886602

Title:
  Windows 10 very slow with OVMF

Status in QEMU:
  New

Bug description:
  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.

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