Keine volle CPU Frequence vom Host auf der GAST-VM

[Profdanibest]

Hallo liebe Community,

ich habe ein Proxmox Server mit folgender Austattung:

• Mainboard: ASUSTeK W680/MB DC
• CPU: 32 x 13th Gen Intel(R) Core(TM) i9-13900 (1 Socket)
• ...

Auf dem Host habe ich per s-tui ein Stress Test durchgefhrt und bekomem dort die volle ~5.6Ghz zu spüren. Daraufhin habe ich mir eine Qemu KVM "Ubuntu 22.04" mit den folgenden Optionen installiert:

boot: c
bootdisk: scsi0
cipassword: XXX
ciuser: root
cores: 8
cpu: host
ide2: local-zfs:vm-1030-cloudinit,media=cdrom,size=4M
ipconfig0: ip=XXX/27,gw=XXX
memory: 4096
meta: creation-qemu=8.1.5,ctime=1710786778
name: daniel.test2
net0: virtio=BC:24:11:A2:49:93,bridge=vmbr0
numa: 1
scsi0: local-zfs:vm-1030-disk-0,size=13824M
scsihw: virtio-scsi-pci
serial0: socket
smbios1: uuid=81167fe8-d032-4357-8fa6-f7cd85e6f110
sockets: 1
vga: serial0
vmgenid: c3aa2c75-0a40-4330-a612-fd25a4fdec00

[PENDING]
numa: 0

Wichtig zu beachten ist, dass ich die CPU Art auf Host umgestellt habe. Starte ich die VM und logge mich in die VM ein und starte dort ein Stress Test bekomme ich nur schlappe 1996.80mhz. Warum? Kann mir jemand das erklären und mir auch verraten wie ich die CPU direkt zur Gast VM weiterleiten kann?

Vielen Dank

Übrigens das ist dann die Ausgabe von cat /proc/cpuinfo | less

processor    : 0
vendor_id    : GenuineIntel
cpu family    : 6
model        : 183
model name    : 13th Gen Intel(R) Core(TM) i9-13900
stepping    : 1
microcode    : 0x10e
cpu MHz        : 1996.800
cache size    : 16384 KB
physical id    : 0
siblings    : 8
core id        : 0
cpu cores    : 8
apicid        : 0
initial apicid    : 0
fpu        : yes
fpu_exception    : yes
cpuid level    : 31
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves avx_vnni arat vnmi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize flush_l1d arch_capabilities
vmx flags    : vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid shadow_vmcs pml tsc_scaling
bugs        : spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips    : 3993.60
clflush size    : 64
cache_alignment    : 64
address sizes    : 46 bits physical, 48 bits virtual
power management:

processor    : 1
vendor_id    : GenuineIntel
cpu family    : 6
model        : 183
model name    : 13th Gen Intel(R) Core(TM) i9-13900
stepping    : 1
microcode    : 0x10e
cpu MHz        : 1996.800
cache size    : 16384 KB
physical id    : 0
siblings    : 8
core id        : 1
cpu cores    : 8
apicid        : 1
initial apicid    : 1
fpu        : yes
fpu_exception    : yes
cpuid level    : 31
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves avx_vnni arat vnmi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize flush_l1d arch_capabilities
vmx flags    : vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid shadow_vmcs pml tsc_scaling
bugs        : spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips    : 3993.60
clflush size    : 64
cache_alignment    : 64
address sizes    : 46 bits physical, 48 bits virtual
power management:

processor    : 2
vendor_id    : GenuineIntel
cpu family    : 6
model        : 183
model name    : 13th Gen Intel(R) Core(TM) i9-13900
stepping    : 1
microcode    : 0x10e
cpu MHz        : 1996.800
cache size    : 16384 KB
physical id    : 0
siblings    : 8
core id        : 2
cpu cores    : 8
apicid        : 2
initial apicid    : 2
fpu        : yes
fpu_exception    : yes
cpuid level    : 31
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves avx_vnni arat vnmi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize flush_l1d arch_capabilities
vmx flags    : vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid shadow_vmcs pml tsc_scaling
bugs        : spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips    : 3993.60
clflush size    : 64
cache_alignment    : 64
address sizes    : 46 bits physical, 48 bits virtual
power management:

processor    : 3
vendor_id    : GenuineIntel
cpu family    : 6
model        : 183
model name    : 13th Gen Intel(R) Core(TM) i9-13900
stepping    : 1
microcode    : 0x10e
cpu MHz        : 1996.800
cache size    : 16384 KB
physical id    : 0
siblings    : 8
core id        : 3
cpu cores    : 8
apicid        : 3
initial apicid    : 3
fpu        : yes
fpu_exception    : yes
cpuid level    : 31
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves avx_vnni arat vnmi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize flush_l1d arch_capabilities
vmx flags    : vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid shadow_vmcs pml tsc_scaling
bugs        : spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips    : 3993.60
clflush size    : 64
cache_alignment    : 64
address sizes    : 46 bits physical, 48 bits virtual
power management:

processor    : 4
vendor_id    : GenuineIntel
cpu family    : 6
model        : 183
model name    : 13th Gen Intel(R) Core(TM) i9-13900
stepping    : 1
microcode    : 0x10e
cpu MHz        : 1996.800
cache size    : 16384 KB
physical id    : 0
siblings    : 8
core id        : 4
cpu cores    : 8
apicid        : 4
initial apicid    : 4
fpu        : yes
fpu_exception    : yes
cpuid level    : 31
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves avx_vnni arat vnmi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize flush_l1d arch_capabilities
vmx flags    : vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid shadow_vmcs pml tsc_scaling
bugs        : spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips    : 3993.60
clflush size    : 64
cache_alignment    : 64
address sizes    : 46 bits physical, 48 bits virtual
power management:

processor    : 5
vendor_id    : GenuineIntel
cpu family    : 6
model        : 183
model name    : 13th Gen Intel(R) Core(TM) i9-13900
stepping    : 1
microcode    : 0x10e
cpu MHz        : 1996.800
cache size    : 16384 KB
physical id    : 0
siblings    : 8
core id        : 5
cpu cores    : 8
apicid        : 5
initial apicid    : 5
fpu        : yes
fpu_exception    : yes
cpuid level    : 31
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves avx_vnni arat vnmi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize flush_l1d arch_capabilities
vmx flags    : vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid shadow_vmcs pml tsc_scaling
bugs        : spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips    : 3993.60
clflush size    : 64
cache_alignment    : 64
address sizes    : 46 bits physical, 48 bits virtual
power management:

processor    : 6
vendor_id    : GenuineIntel
cpu family    : 6
model        : 183
model name    : 13th Gen Intel(R) Core(TM) i9-13900
stepping    : 1
microcode    : 0x10e
cpu MHz        : 1996.800
cache size    : 16384 KB
physical id    : 0
siblings    : 8
core id        : 6
cpu cores    : 8
apicid        : 6
initial apicid    : 6
fpu        : yes
fpu_exception    : yes
cpuid level    : 31
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves avx_vnni arat vnmi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize flush_l1d arch_capabilities
vmx flags    : vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid shadow_vmcs pml tsc_scaling
bugs        : spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips    : 3993.60
clflush size    : 64
cache_alignment    : 64
address sizes    : 46 bits physical, 48 bits virtual
power management:

processor    : 7
vendor_id    : GenuineIntel
cpu family    : 6
model        : 183
model name    : 13th Gen Intel(R) Core(TM) i9-13900
stepping    : 1
microcode    : 0x10e
cpu MHz        : 1996.800
cache size    : 16384 KB
physical id    : 0
siblings    : 8
core id        : 7
cpu cores    : 8
apicid        : 7
initial apicid    : 7
fpu        : yes
fpu_exception    : yes
cpuid level    : 31
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves avx_vnni arat vnmi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid movdiri movdir64b fsrm md_clear serialize flush_l1d arch_capabilities
vmx flags    : vnmi preemption_timer posted_intr invvpid ept_x_only ept_ad ept_1gb flexpriority apicv tsc_offset vtpr mtf vapic ept vpid unrestricted_guest vapic_reg vid shadow_vmcs pml tsc_scaling
bugs        : spectre_v1 spectre_v2 spec_store_bypass swapgs eibrs_pbrsb
bogomips    : 3993.60
clflush size    : 64
cache_alignment    : 64
address sizes    : 46 bits physical, 48 bits virtual
power management:

 

[Falk R.]

Das ist ein Problem der Intel CPUs mit e und p Cores. Der Host kann auf die p-Cores wechseln, da er weiß, dass es die gibt. In einer VM funktioniert das bei keinem Hypervisor. Willst du Maximale Performance auf einer VM musst du die p-Cores fest zuweisen.

 

[Profdanibest]

Okay Danke Falk. Wie genau funktioniert das. Ist das eine BIOS Einstellung oder eine Konfiguration auf dem Host für eine VM? Ist es zufällig dies: https://pve.proxmox.com/wiki/Qemu/KVM_Virtual_Machines -> affinity ?

 

[Falk R.]

Ja, genauso stellt man das pro VM ein.

 

[Neobin]

Starte ich die VM und logge mich in die VM ein und starte dort ein Stress Test bekomme ich nur schlappe 1996.80mhz.

Übrigens das ist dann die Ausgabe von cat /proc/cpuinfo | less

Ich vermute, die Ausgabe ist von innerhalb der VM? Dort ist die Frequenz nicht aussagekräftig und irrelevant.
Wenn, dann musst du dir die Frequenzen auf dem Host anschauen, während die Last in der VM läuft.