profiling netperf on KVM using perf tool #2

Guest -> Host case:

** experimental setting **
- 192.168.1.1: host OS
- 192.168.1.10: guest OS (VCPU 2: -smp sockets=2,cores=1)

192.168.1.10$ netperf -H 192.168.1.1 -c -C -l 70
TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.1.1 (192.168.1.1) port 0 AF_INET : demo
Recv   Send    Send                          Utilization       Service Demand
Socket Socket  Message  Elapsed              Send     Recv     Send    Recv
Size   Size    Size     Time     Throughput  local    remote   local   remote
bytes  bytes   bytes    secs.    10^6bits/s  % S      % S      us/KB   us/KB

 87380  65536  65536    70.00      2999.72   63.69    15.73    3.479   3.436


192.168.1.1$ sudo ./perf stat -e 'kvm:*' -a sleep 1m

 Performance counter stats for 'sleep 1m':

        1580336  kvm:kvm_entry           
              0  kvm:kvm_hypercall       
              0  kvm:kvm_hv_hypercall    
         102102  kvm:kvm_pio             
              0  kvm:kvm_cpuid           
         338128  kvm:kvm_apic            
        1580323  kvm:kvm_exit            
         326072  kvm:kvm_inj_virq        
         606024  kvm:kvm_page_fault      
              0  kvm:kvm_msr             
             79  kvm:kvm_cr              
              0  kvm:kvm_pic_set_irq     
              8  kvm:kvm_apic_ipi        
        1287476  kvm:kvm_apic_accept_irq 
              0  kvm:kvm_nested_vmrun    
              0  kvm:kvm_nested_vmexit   
              0  kvm:kvm_nested_vmexit_inject
              0  kvm:kvm_nested_intr_vmexit
              0  kvm:kvm_invlpga         
              0  kvm:kvm_skinit          
        1275466  kvm:kvm_set_irq         
              0  kvm:kvm_ioapic_set_irq  
        1275466  kvm:kvm_msi_set_irq     
              0  kvm:kvm_ack_irq         
        1247045  kvm:kvm_mmio            
             32  kvm:kvm_fpu             
              0  kvm:kvm_age_page        

   60.000960093  seconds time elapsed