Can you still reproduce the issue with a recent Linux kernel and the
latest version of QEMU?

** Changed in: qemu
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1516446

Title:
  Migration always causes guest freeze in one direction.

Status in QEMU:
  Incomplete

Bug description:
  Hello,

  I have three debian jessie machines standard installations except for
  homebuild qemu-2.4.0 package using the source package from testing. I
  had the same problem with the standard debian jessie qemu 2.1 too.

  I have host A, B and C.

  Migrations work between all combinations of these except A -> B. B ->
  A works.

  I use libvirt but as per your written request I have run qemu directly
  and verified the same problem.

  Host A:
  qemu-system-x86_64 --enable-kvm -name ashole -cpu kvm64 -m 1024 -drive 
file=/mnt/synctest/ashole.raw,if=none,id=drive-virtio-disk0,format=raw,cache=none
 -vnc 0.0.0.0:600 -k sv -vga std -device 
virtio-blk-pci,scsi=off,bus=pci.0,addr=0x9,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1

  Host B:
  qemu-system-x86_64 --enable-kvm -name ashole -cpu kvm64 -m 1024 -drive 
file=/mnt/synctest/ashole.raw,if=none,id=drive-virtio-disk0,format=raw,cache=none
 -vnc 0.0.0.0:600 -k sv -vga std -device 
virtio-blk-pci,scsi=off,bus=pci.0,addr=0x9,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
 -incoming tcp:0:4444

  Then in qemu monitor I run migrate -d tcp:B:4444 and the guest freeze.

  I have tried with these guest os:es, freebsd 9.1, debian wheezy and
  debian jessie (Standard 3.16 kernel and backported 4.2 kernel), same
  problem with all of them. when running the migration through libvirt
  virt-manager says the guest is using 100% cpu.

  I had a similar problem
  (https://bugzilla.kernel.org/show_bug.cgi?id=61971) 2 years ago which
  was solved in kernel 3.13 if I remember correctly.

  Best Regards
  Magnus

  CPU info:
  Host A
  processor     : 0
  vendor_id     : AuthenticAMD
  cpu family    : 21
  model         : 2
  model name    : AMD FX(tm)-8320 Eight-Core Processor
  stepping      : 0
  microcode     : 0x600081f
  cpu MHz               : 1400.000
  cache size    : 2048 KB
  physical id   : 0
  siblings      : 8
  core id               : 0
  cpu cores     : 4
  apicid                : 16
  initial apicid        : 0
  fpu           : yes
  fpu_exception : yes
  cpuid level   : 13
  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 ht syscall nx mmxext fxsr_opt pdpe1gb 
rdtscp lm constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf pni 
pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 popcnt aes xsave avx f16c 
lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch 
osvw ibs xop skinit wdt lwp fma4 tce nodeid_msr tbm topoext perfctr_core 
perfctr_nb arat cpb hw_pstate npt lbrv svm_lock nrip_save tsc_scale vmcb_clean 
flushbyasid decodeassists pausefilter pfthreshold vmmcall bmi1
  bugs          : fxsave_leak sysret_ss_attrs
  bogomips      : 7023.54
  TLB size      : 1536 4K pages
  clflush size  : 64
  cache_alignment       : 64
  address sizes : 48 bits physical, 48 bits virtual
  power management: ts ttp tm 100mhzsteps hwpstate cpb eff_freq_ro

  processor     : 1
  vendor_id     : AuthenticAMD
  cpu family    : 21
  model         : 2
  model name    : AMD FX(tm)-8320 Eight-Core Processor
  stepping      : 0
  microcode     : 0x600081f
  cpu MHz               : 1400.000
  cache size    : 2048 KB
  physical id   : 0
  siblings      : 8
  core id               : 1
  cpu cores     : 4
  apicid                : 17
  initial apicid        : 1
  fpu           : yes
  fpu_exception : yes
  cpuid level   : 13
  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 ht syscall nx mmxext fxsr_opt pdpe1gb 
rdtscp lm constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf pni 
pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 popcnt aes xsave avx f16c 
lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch 
osvw ibs xop skinit wdt lwp fma4 tce nodeid_msr tbm topoext perfctr_core 
perfctr_nb arat cpb hw_pstate npt lbrv svm_lock nrip_save tsc_scale vmcb_clean 
flushbyasid decodeassists pausefilter pfthreshold vmmcall bmi1
  bugs          : fxsave_leak sysret_ss_attrs
  bogomips      : 7023.54
  TLB size      : 1536 4K pages
  clflush size  : 64
  cache_alignment       : 64
  address sizes : 48 bits physical, 48 bits virtual
  power management: ts ttp tm 100mhzsteps hwpstate cpb eff_freq_ro

  processor     : 2
  vendor_id     : AuthenticAMD
  cpu family    : 21
  model         : 2
  model name    : AMD FX(tm)-8320 Eight-Core Processor
  stepping      : 0
  microcode     : 0x600081f
  cpu MHz               : 1700.000
  cache size    : 2048 KB
  physical id   : 0
  siblings      : 8
  core id               : 2
  cpu cores     : 4
  apicid                : 18
  initial apicid        : 2
  fpu           : yes
  fpu_exception : yes
  cpuid level   : 13
  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 ht syscall nx mmxext fxsr_opt pdpe1gb 
rdtscp lm constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf pni 
pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 popcnt aes xsave avx f16c 
lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch 
osvw ibs xop skinit wdt lwp fma4 tce nodeid_msr tbm topoext perfctr_core 
perfctr_nb arat cpb hw_pstate npt lbrv svm_lock nrip_save tsc_scale vmcb_clean 
flushbyasid decodeassists pausefilter pfthreshold vmmcall bmi1
  bugs          : fxsave_leak sysret_ss_attrs
  bogomips      : 7023.54
  TLB size      : 1536 4K pages
  clflush size  : 64
  cache_alignment       : 64
  address sizes : 48 bits physical, 48 bits virtual
  power management: ts ttp tm 100mhzsteps hwpstate cpb eff_freq_ro

  processor     : 3
  vendor_id     : AuthenticAMD
  cpu family    : 21
  model         : 2
  model name    : AMD FX(tm)-8320 Eight-Core Processor
  stepping      : 0
  microcode     : 0x600081f
  cpu MHz               : 1400.000
  cache size    : 2048 KB
  physical id   : 0
  siblings      : 8
  core id               : 3
  cpu cores     : 4
  apicid                : 19
  initial apicid        : 3
  fpu           : yes
  fpu_exception : yes
  cpuid level   : 13
  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 ht syscall nx mmxext fxsr_opt pdpe1gb 
rdtscp lm constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf pni 
pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 popcnt aes xsave avx f16c 
lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch 
osvw ibs xop skinit wdt lwp fma4 tce nodeid_msr tbm topoext perfctr_core 
perfctr_nb arat cpb hw_pstate npt lbrv svm_lock nrip_save tsc_scale vmcb_clean 
flushbyasid decodeassists pausefilter pfthreshold vmmcall bmi1
  bugs          : fxsave_leak sysret_ss_attrs
  bogomips      : 7023.54
  TLB size      : 1536 4K pages
  clflush size  : 64
  cache_alignment       : 64
  address sizes : 48 bits physical, 48 bits virtual
  power management: ts ttp tm 100mhzsteps hwpstate cpb eff_freq_ro

  processor     : 4
  vendor_id     : AuthenticAMD
  cpu family    : 21
  model         : 2
  model name    : AMD FX(tm)-8320 Eight-Core Processor
  stepping      : 0
  microcode     : 0x600081f
  cpu MHz               : 1400.000
  cache size    : 2048 KB
  physical id   : 0
  siblings      : 8
  core id               : 4
  cpu cores     : 4
  apicid                : 20
  initial apicid        : 4
  fpu           : yes
  fpu_exception : yes
  cpuid level   : 13
  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 ht syscall nx mmxext fxsr_opt pdpe1gb 
rdtscp lm constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf pni 
pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 popcnt aes xsave avx f16c 
lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch 
osvw ibs xop skinit wdt lwp fma4 tce nodeid_msr tbm topoext perfctr_core 
perfctr_nb arat cpb hw_pstate npt lbrv svm_lock nrip_save tsc_scale vmcb_clean 
flushbyasid decodeassists pausefilter pfthreshold vmmcall bmi1
  bugs          : fxsave_leak sysret_ss_attrs
  bogomips      : 7023.54
  TLB size      : 1536 4K pages
  clflush size  : 64
  cache_alignment       : 64
  address sizes : 48 bits physical, 48 bits virtual
  power management: ts ttp tm 100mhzsteps hwpstate cpb eff_freq_ro

  processor     : 5
  vendor_id     : AuthenticAMD
  cpu family    : 21
  model         : 2
  model name    : AMD FX(tm)-8320 Eight-Core Processor
  stepping      : 0
  microcode     : 0x600081f
  cpu MHz               : 1400.000
  cache size    : 2048 KB
  physical id   : 0
  siblings      : 8
  core id               : 5
  cpu cores     : 4
  apicid                : 21
  initial apicid        : 5
  fpu           : yes
  fpu_exception : yes
  cpuid level   : 13
  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 ht syscall nx mmxext fxsr_opt pdpe1gb 
rdtscp lm constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf pni 
pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 popcnt aes xsave avx f16c 
lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch 
osvw ibs xop skinit wdt lwp fma4 tce nodeid_msr tbm topoext perfctr_core 
perfctr_nb arat cpb hw_pstate npt lbrv svm_lock nrip_save tsc_scale vmcb_clean 
flushbyasid decodeassists pausefilter pfthreshold vmmcall bmi1
  bugs          : fxsave_leak sysret_ss_attrs
  bogomips      : 7023.54
  TLB size      : 1536 4K pages
  clflush size  : 64
  cache_alignment       : 64
  address sizes : 48 bits physical, 48 bits virtual
  power management: ts ttp tm 100mhzsteps hwpstate cpb eff_freq_ro

  processor     : 6
  vendor_id     : AuthenticAMD
  cpu family    : 21
  model         : 2
  model name    : AMD FX(tm)-8320 Eight-Core Processor
  stepping      : 0
  microcode     : 0x600081f
  cpu MHz               : 1400.000
  cache size    : 2048 KB
  physical id   : 0
  siblings      : 8
  core id               : 6
  cpu cores     : 4
  apicid                : 22
  initial apicid        : 6
  fpu           : yes
  fpu_exception : yes
  cpuid level   : 13
  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 ht syscall nx mmxext fxsr_opt pdpe1gb 
rdtscp lm constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf pni 
pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 popcnt aes xsave avx f16c 
lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch 
osvw ibs xop skinit wdt lwp fma4 tce nodeid_msr tbm topoext perfctr_core 
perfctr_nb arat cpb hw_pstate npt lbrv svm_lock nrip_save tsc_scale vmcb_clean 
flushbyasid decodeassists pausefilter pfthreshold vmmcall bmi1
  bugs          : fxsave_leak sysret_ss_attrs
  bogomips      : 7023.54
  TLB size      : 1536 4K pages
  clflush size  : 64
  cache_alignment       : 64
  address sizes : 48 bits physical, 48 bits virtual
  power management: ts ttp tm 100mhzsteps hwpstate cpb eff_freq_ro

  processor     : 7
  vendor_id     : AuthenticAMD
  cpu family    : 21
  model         : 2
  model name    : AMD FX(tm)-8320 Eight-Core Processor
  stepping      : 0
  microcode     : 0x600081f
  cpu MHz               : 1400.000
  cache size    : 2048 KB
  physical id   : 0
  siblings      : 8
  core id               : 7
  cpu cores     : 4
  apicid                : 23
  initial apicid        : 7
  fpu           : yes
  fpu_exception : yes
  cpuid level   : 13
  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 ht syscall nx mmxext fxsr_opt pdpe1gb 
rdtscp lm constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf pni 
pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 popcnt aes xsave avx f16c 
lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch 
osvw ibs xop skinit wdt lwp fma4 tce nodeid_msr tbm topoext perfctr_core 
perfctr_nb arat cpb hw_pstate npt lbrv svm_lock nrip_save tsc_scale vmcb_clean 
flushbyasid decodeassists pausefilter pfthreshold vmmcall bmi1
  bugs          : fxsave_leak sysret_ss_attrs
  bogomips      : 7023.54
  TLB size      : 1536 4K pages
  clflush size  : 64
  cache_alignment       : 64
  address sizes : 48 bits physical, 48 bits virtual
  power management: ts ttp tm 100mhzsteps hwpstate cpb eff_freq_ro

  Host B:
  processor     : 0
  vendor_id     : AuthenticAMD
  cpu family    : 16
  model         : 10
  model name    : AMD Phenom(tm) II X6 1055T Processor
  stepping      : 0
  microcode     : 0x10000bf
  cpu MHz               : 800.000
  cache size    : 512 KB
  physical id   : 0
  siblings      : 6
  core id               : 0
  cpu cores     : 6
  apicid                : 0
  initial apicid        : 0
  fpu           : yes
  fpu_exception : yes
  cpuid level   : 6
  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 ht syscall nx mmxext fxsr_opt pdpe1gb 
rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid 
aperfmperf pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy 
abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt cpb hw_pstate npt lbrv 
svm_lock nrip_save pausefilter vmmcall
  bugs          : tlb_mmatch apic_c1e fxsave_leak sysret_ss_attrs
  bogomips      : 5624.68
  TLB size      : 1024 4K pages
  clflush size  : 64
  cache_alignment       : 64
  address sizes : 48 bits physical, 48 bits virtual
  power management: ts ttp tm stc 100mhzsteps hwpstate cpb

  processor     : 1
  vendor_id     : AuthenticAMD
  cpu family    : 16
  model         : 10
  model name    : AMD Phenom(tm) II X6 1055T Processor
  stepping      : 0
  microcode     : 0x10000bf
  cpu MHz               : 800.000
  cache size    : 512 KB
  physical id   : 0
  siblings      : 6
  core id               : 1
  cpu cores     : 6
  apicid                : 1
  initial apicid        : 1
  fpu           : yes
  fpu_exception : yes
  cpuid level   : 6
  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 ht syscall nx mmxext fxsr_opt pdpe1gb 
rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid 
aperfmperf pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy 
abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt cpb hw_pstate npt lbrv 
svm_lock nrip_save pausefilter vmmcall
  bugs          : tlb_mmatch apic_c1e fxsave_leak sysret_ss_attrs
  bogomips      : 5624.68
  TLB size      : 1024 4K pages
  clflush size  : 64
  cache_alignment       : 64
  address sizes : 48 bits physical, 48 bits virtual
  power management: ts ttp tm stc 100mhzsteps hwpstate cpb

  processor     : 2
  vendor_id     : AuthenticAMD
  cpu family    : 16
  model         : 10
  model name    : AMD Phenom(tm) II X6 1055T Processor
  stepping      : 0
  microcode     : 0x10000bf
  cpu MHz               : 800.000
  cache size    : 512 KB
  physical id   : 0
  siblings      : 6
  core id               : 2
  cpu cores     : 6
  apicid                : 2
  initial apicid        : 2
  fpu           : yes
  fpu_exception : yes
  cpuid level   : 6
  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 ht syscall nx mmxext fxsr_opt pdpe1gb 
rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid 
aperfmperf pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy 
abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt cpb hw_pstate npt lbrv 
svm_lock nrip_save pausefilter vmmcall
  bugs          : tlb_mmatch apic_c1e fxsave_leak sysret_ss_attrs
  bogomips      : 5624.68
  TLB size      : 1024 4K pages
  clflush size  : 64
  cache_alignment       : 64
  address sizes : 48 bits physical, 48 bits virtual
  power management: ts ttp tm stc 100mhzsteps hwpstate cpb

  processor     : 3
  vendor_id     : AuthenticAMD
  cpu family    : 16
  model         : 10
  model name    : AMD Phenom(tm) II X6 1055T Processor
  stepping      : 0
  microcode     : 0x10000bf
  cpu MHz               : 800.000
  cache size    : 512 KB
  physical id   : 0
  siblings      : 6
  core id               : 3
  cpu cores     : 6
  apicid                : 3
  initial apicid        : 3
  fpu           : yes
  fpu_exception : yes
  cpuid level   : 6
  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 ht syscall nx mmxext fxsr_opt pdpe1gb 
rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid 
aperfmperf pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy 
abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt cpb hw_pstate npt lbrv 
svm_lock nrip_save pausefilter vmmcall
  bugs          : tlb_mmatch apic_c1e fxsave_leak sysret_ss_attrs
  bogomips      : 5624.68
  TLB size      : 1024 4K pages
  clflush size  : 64
  cache_alignment       : 64
  address sizes : 48 bits physical, 48 bits virtual
  power management: ts ttp tm stc 100mhzsteps hwpstate cpb

  processor     : 4
  vendor_id     : AuthenticAMD
  cpu family    : 16
  model         : 10
  model name    : AMD Phenom(tm) II X6 1055T Processor
  stepping      : 0
  microcode     : 0x10000bf
  cpu MHz               : 800.000
  cache size    : 512 KB
  physical id   : 0
  siblings      : 6
  core id               : 4
  cpu cores     : 6
  apicid                : 4
  initial apicid        : 4
  fpu           : yes
  fpu_exception : yes
  cpuid level   : 6
  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 ht syscall nx mmxext fxsr_opt pdpe1gb 
rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid 
aperfmperf pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy 
abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt cpb hw_pstate npt lbrv 
svm_lock nrip_save pausefilter vmmcall
  bugs          : tlb_mmatch apic_c1e fxsave_leak sysret_ss_attrs
  bogomips      : 5624.68
  TLB size      : 1024 4K pages
  clflush size  : 64
  cache_alignment       : 64
  address sizes : 48 bits physical, 48 bits virtual
  power management: ts ttp tm stc 100mhzsteps hwpstate cpb

  processor     : 5
  vendor_id     : AuthenticAMD
  cpu family    : 16
  model         : 10
  model name    : AMD Phenom(tm) II X6 1055T Processor
  stepping      : 0
  microcode     : 0x10000bf
  cpu MHz               : 800.000
  cache size    : 512 KB
  physical id   : 0
  siblings      : 6
  core id               : 5
  cpu cores     : 6
  apicid                : 5
  initial apicid        : 5
  fpu           : yes
  fpu_exception : yes
  cpuid level   : 6
  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 ht syscall nx mmxext fxsr_opt pdpe1gb 
rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid 
aperfmperf pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy 
abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt cpb hw_pstate npt lbrv 
svm_lock nrip_save pausefilter vmmcall
  bugs          : tlb_mmatch apic_c1e fxsave_leak sysret_ss_attrs
  bogomips      : 5624.68
  TLB size      : 1024 4K pages
  clflush size  : 64
  cache_alignment       : 64
  address sizes : 48 bits physical, 48 bits virtual
  power management: ts ttp tm stc 100mhzsteps hwpstate cpb

  Host C:
  processor     : 0
  vendor_id     : GenuineIntel
  cpu family    : 6
  model         : 58
  model name    : Intel(R) Core(TM) i5-3450 CPU @ 3.10GHz
  stepping      : 9
  microcode     : 0x12
  cpu MHz               : 1607.156
  cache size    : 6144 KB
  physical id   : 0
  siblings      : 4
  core id               : 0
  cpu cores     : 4
  apicid                : 0
  initial apicid        : 0
  fpu           : yes
  fpu_exception : yes
  cpuid level   : 13
  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 rdtscp lm 
constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc 
aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 
xtpr pdcm pcid sse4_1 sse4_2 popcnt tsc_deadline_timer xsave avx f16c rdrand 
lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid 
fsgsbase smep erms xsaveopt
  bugs          :
  bogomips      : 6186.23
  clflush size  : 64
  cache_alignment       : 64
  address sizes : 36 bits physical, 48 bits virtual
  power management:

  processor     : 1
  vendor_id     : GenuineIntel
  cpu family    : 6
  model         : 58
  model name    : Intel(R) Core(TM) i5-3450 CPU @ 3.10GHz
  stepping      : 9
  microcode     : 0x12
  cpu MHz               : 1730.066
  cache size    : 6144 KB
  physical id   : 0
  siblings      : 4
  core id               : 1
  cpu cores     : 4
  apicid                : 2
  initial apicid        : 2
  fpu           : yes
  fpu_exception : yes
  cpuid level   : 13
  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 rdtscp lm 
constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc 
aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 
xtpr pdcm pcid sse4_1 sse4_2 popcnt tsc_deadline_timer xsave avx f16c rdrand 
lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid 
fsgsbase smep erms xsaveopt
  bugs          :
  bogomips      : 6186.23
  clflush size  : 64
  cache_alignment       : 64
  address sizes : 36 bits physical, 48 bits virtual
  power management:

  processor     : 2
  vendor_id     : GenuineIntel
  cpu family    : 6
  model         : 58
  model name    : Intel(R) Core(TM) i5-3450 CPU @ 3.10GHz
  stepping      : 9
  microcode     : 0x12
  cpu MHz               : 1654.382
  cache size    : 6144 KB
  physical id   : 0
  siblings      : 4
  core id               : 2
  cpu cores     : 4
  apicid                : 4
  initial apicid        : 4
  fpu           : yes
  fpu_exception : yes
  cpuid level   : 13
  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 rdtscp lm 
constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc 
aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 
xtpr pdcm pcid sse4_1 sse4_2 popcnt tsc_deadline_timer xsave avx f16c rdrand 
lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid 
fsgsbase smep erms xsaveopt
  bugs          :
  bogomips      : 6186.23
  clflush size  : 64
  cache_alignment       : 64
  address sizes : 36 bits physical, 48 bits virtual
  power management:

  processor     : 3
  vendor_id     : GenuineIntel
  cpu family    : 6
  model         : 58
  model name    : Intel(R) Core(TM) i5-3450 CPU @ 3.10GHz
  stepping      : 9
  microcode     : 0x12
  cpu MHz               : 1610.304
  cache size    : 6144 KB
  physical id   : 0
  siblings      : 4
  core id               : 3
  cpu cores     : 4
  apicid                : 6
  initial apicid        : 6
  fpu           : yes
  fpu_exception : yes
  cpuid level   : 13
  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 rdtscp lm 
constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc 
aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 
xtpr pdcm pcid sse4_1 sse4_2 popcnt tsc_deadline_timer xsave avx f16c rdrand 
lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid 
fsgsbase smep erms xsaveopt
  bugs          :
  bogomips      : 6186.23
  clflush size  : 64
  cache_alignment       : 64
  address sizes : 36 bits physical, 48 bits virtual
  power management:

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