title: Intel Turbo boost for KVM Guest
body: <p>Please excuse me if this is a stupid question, however, I'm curious why I'm not seeing any clock speed differences when using fedora as a guest VM via KVM/QEMU. </p>
  
  <p>Perhaps this is a rather dumb way of concluding such things, but when I do cat /proc/cpuinfo | grep MHz it's always the same and it's the base clock speed advertised by my xeons.</p>
  
  <p>Is there some option I have to pass virsh to enable turbo boost?</p>
  
  <p>This might be helpful:</p>
  
  <pre><code>[jflowers@console ~]$ sudo lshw -class processor*-cpu                     
     description: CPU
     product: Intel(R) Xeon(R) CPU E5-2630 v4 @ 2.20GHz
     vendor: Intel Corp.
     physical id: 400
     bus info: cpu@0
     version: pc-q35-2.3
     slot: CPU 0
     size: 2GHz
     capacity: 2GHz
     width: 64 bits
     capabilities: fpu fpu_exception wp 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 x86-64 constant_tsc arch_perfmon rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm rdseed adx smap xsaveopt
     configuration: cores=30 enabledcores=30 threads=1*-processor UNCLAIMED
     description: SCSI Processor
     product: Console
     vendor: Marvell
     physical id: 0.0.0
     bus info: scsi@7:0.0.0
     version: 1.01
     capabilities: removable
     configuration: ansiversion=5
  </code></pre>
  
  <p>And a different utility:</p>
  
  <pre><code>[jflowers@console ~]$ lscpu
  Architecture:          x86_64
  CPU op-mode(s):        32-bit, 64-bit
  Byte Order:            Little Endian
  CPU(s):                30
  On-line CPU(s) list:   0-29
  Thread(s) per core:    1
  Core(s) per socket:    30
  Socket(s):             1
  NUMA node(s):          1
  Vendor ID:             GenuineIntel
  CPU family:            6
  Model:                 79
  Model name:            Intel(R) Xeon(R) CPU E5-2630 v4 @ 2.20GHz
  Stepping:              1
  CPU MHz:               2195.304
  BogoMIPS:              4390.60
  L1d cache:             32K
  L1i cache:             32K
  L2 cache:              256K
  L3 cache:              25600K
  NUMA node0 CPU(s):     0-29
  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 arch_perfmon rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm rdseed adx smap xsaveopt
  </code></pre>