Hello, I'm new to pve, I'm running several vms in pve, such as ubuntu-server, windows 10.
My cpu is j4125, it has 4c4t, basic frequency is 2.0G, can boost up to 2.6G in pve host, but only 2.0G constantly in vms.
here are some information:
In pve host, cat /proc/cpuinfo, one of cores as below:
cat /proc/cpuinfo | grep "MHz"
cpu MHz : 1818.629
cpu MHz : 1878.818
cpu MHz : 2372.414
cpu MHz : 2473.969
Min frequency is 800MHz, so it's between 800 to 2.6G.
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors
performance powersave
cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
performance
performance
performance
performance
In ubuntu-server vm, cpu type is "host":
cat /proc/cpuinfo | grep "MHz"
cpu MHz : 1996.800
cpu MHz : 1996.800
The value "1996.800" will not change.
In win 10 vm, cpu type is "host" as well:
So it seems that turbo/boost not enable in vm, am I missing something? or anything should I check/do?
best regards.
My cpu is j4125, it has 4c4t, basic frequency is 2.0G, can boost up to 2.6G in pve host, but only 2.0G constantly in vms.
here are some information:
In pve host, cat /proc/cpuinfo, one of cores as below:
Bash:
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 122
model name : Intel(R) Celeron(R) J4125 CPU @ 2.00GHz
stepping : 8
microcode : 0x16
cpu MHz : 2117.062
cache size : 4096 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 4
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 24
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 cx16 xtpr pdcm sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave rdrand lahf_lm 3dnowprefetch cpuid_fault cat_l2 cdp_l2 ssbd ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust smep erms mpx rdt_a rdseed smap clflushopt intel_pt sha_ni xsaveopt xsavec xgetbv1 xsaves dtherm ida arat pln pts umip rdpid md_clear arch_capabilities
bugs : spectre_v1 spectre_v2 spec_store_bypass
bogomips : 3993.60
clflush size : 64
cache_alignment : 64
address sizes : 39 bits physical, 48 bits virtual
power management:cat /proc/cpuinfo | grep "MHz"
cpu MHz : 1818.629
cpu MHz : 1878.818
cpu MHz : 2372.414
cpu MHz : 2473.969
Min frequency is 800MHz, so it's between 800 to 2.6G.
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors
performance powersave
cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
performance
performance
performance
performance
In ubuntu-server vm, cpu type is "host":
cat /proc/cpuinfo | grep "MHz"
cpu MHz : 1996.800
cpu MHz : 1996.800
The value "1996.800" will not change.
In win 10 vm, cpu type is "host" as well:
So it seems that turbo/boost not enable in vm, am I missing something? or anything should I check/do?
best regards.
Last edited:
