• Ingo Molnar's avatar
    [PATCH] KVM: add VM-exit profiling · 07031e14
    Ingo Molnar authored
    This adds the profile=kvm boot option, which enables KVM to profile VM
    exits.
    
    Use: "readprofile -m ./System.map | sort -n" to see the resulting
    output:
    
       [...]
       18246 serial_out                               148.3415
       18945 native_flush_tlb                         378.9000
       23618 serial_in                                212.7748
       29279 __spin_unlock_irq                        622.9574
       43447 native_apic_write                        2068.9048
       52702 enable_8259A_irq                         742.2817
       54250 vgacon_scroll                             89.3740
       67394 ide_inb                                  6126.7273
       79514 copy_page_range                           98.1654
       84868 do_wp_page                                86.6000
      140266 pit_read                                 783.6089
      151436 ide_outb                                 25239.3333
      152668 native_io_delay                          21809.7143
      174783 mask_and_ack_8259A                       783.7803
      362404 native_set_pte_at                        36240.4000
     1688747 total                                      0.5009
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    Acked-by: default avatarAvi Kivity <avi@qumranet.com>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    07031e14
svm.c 42 KB