sudo pidstat -t -p 4063 Linux 4.4.0-124-generic (desktop) 05/08/2018 _i686_ (2 CPU)
09:43:39 PM UID TGID TID %usr %system %guest %CPU CPU
Command
09:43:39 PM 1000 4063 - 0.01 3.01 0.01 3.04 1
qemu-system-i38
09:43:39 PM 1000 - 4063 0.02 0.00 0.00 0.02 1
|__qemu-system-i38
09:43:39 PM 1000 - 4064 0.00 0.00 0.00 0.00 1
|__qemu-system-i38
09:43:39 PM 1000 - 4066 0.00 3.01 0.01 3.02 0
|__qemu-system-i38
09:43:39 PM 1000 - 4068 0.00 0.00 0.00 0.00 1
|__qemu-system-i38
sudo perf stat -e 'kvm:*' -a sleep 1h
^Csleep: Interrupt
Performance counter stats for 'system wide':
4,221,248 kvm:kvm_entry
(100.00%)
0 kvm:kvm_hypercall
(100.00%)
0 kvm:kvm_hv_hypercall
(100.00%)
0 kvm:kvm_pio
(100.00%)
0 kvm:kvm_fast_mmio
(100.00%)
0 kvm:kvm_cpuid
(100.00%)
0 kvm:kvm_apic
(100.00%)
4,222,925 kvm:kvm_exit
(100.00%)
0 kvm:kvm_inj_virq
(100.00%)
0 kvm:kvm_inj_exception
(100.00%)
0 kvm:kvm_page_fault
(100.00%)
0 kvm:kvm_msr
(100.00%)
0 kvm:kvm_cr
(100.00%)
0 kvm:kvm_pic_set_irq
(100.00%)
0 kvm:kvm_apic_ipi
(100.00%)
0 kvm:kvm_apic_accept_irq
(100.00%)
0 kvm:kvm_eoi
(100.00%)
0 kvm:kvm_pv_eoi
(100.00%)
0 kvm:kvm_nested_vmrun
(100.00%)
0 kvm:kvm_nested_intercepts
(100.00%)
0 kvm:kvm_nested_vmexit
(100.00%)
0 kvm:kvm_nested_vmexit_inject
(100.00%)
0 kvm:kvm_nested_intr_vmexit
(100.00%)
0 kvm:kvm_invlpga
(100.00%)
0 kvm:kvm_skinit
(100.00%)
169,094,024 kvm:kvm_emulate_insn
(100.00%)
0 kvm:vcpu_match_mmio
(100.00%)
0 kvm:kvm_write_tsc_offset
(100.00%)
0 kvm:kvm_pml_full
(100.00%)
0 kvm:kvm_ple_window
(100.00%)
0 kvm:kvm_pvclock_update
(100.00%)
0 kvm:kvm_wait_lapic_expire
(100.00%)
0 kvm:kvm_enter_smm
(100.00%)
0 kvm:kvm_pi_irte_update
(100.00%)
0 kvm:kvm_userspace_exit
(100.00%)
0 kvm:kvm_vcpu_wakeup
(100.00%)
0 kvm:kvm_set_irq
(100.00%)
0 kvm:kvm_ioapic_set_irq
(100.00%)
0 kvm:kvm_ioapic_delayed_eoi_inj
(100.00%)
0 kvm:kvm_msi_set_irq
(100.00%)
0 kvm:kvm_ack_irq
(100.00%)
0 kvm:kvm_mmio
(100.00%)
0 kvm:kvm_fpu
(100.00%)
0 kvm:kvm_age_page
(100.00%)
0 kvm:kvm_try_async_get_page
(100.00%)
0 kvm:kvm_async_pf_doublefault
(100.00%)
0 kvm:kvm_async_pf_not_present
(100.00%)
0 kvm:kvm_async_pf_ready
(100.00%)
0 kvm:kvm_async_pf_completed
(100.00%)
0 kvm:kvm_halt_poll_ns
258.400486070 seconds time elapsed
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https://bugs.launchpad.net/bugs/1767857
Title:
Kernel 4.4.0-122 Breaks qemu-system-x86
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