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authorIngo Molnar <mingo@elte.hu>2007-01-11 02:15:38 -0500
committerLinus Torvalds <torvalds@woody.osdl.org>2007-01-11 21:18:21 -0500
commit07031e14c1127fc7e1a5b98dfcc59f434e025104 (patch)
treebe4f545e674c529abb0f51c8b87e1f7137c9acb6 /drivers/kvm/vmx.c
parente3881a6816b45668df60a426e5c3431ece1539a7 (diff)
[PATCH] KVM: add VM-exit profiling
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: Ingo Molnar <mingo@elte.hu> Acked-by: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/kvm/vmx.c')
-rw-r--r--drivers/kvm/vmx.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index d4701cb4c654..ce219e3f557f 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -21,6 +21,7 @@
21#include <linux/module.h> 21#include <linux/module.h>
22#include <linux/mm.h> 22#include <linux/mm.h>
23#include <linux/highmem.h> 23#include <linux/highmem.h>
24#include <linux/profile.h>
24#include <asm/io.h> 25#include <asm/io.h>
25#include <asm/desc.h> 26#include <asm/desc.h>
26 27
@@ -1859,6 +1860,12 @@ again:
1859 asm ("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS)); 1860 asm ("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS));
1860#endif 1861#endif
1861 1862
1863 /*
1864 * Profile KVM exit RIPs:
1865 */
1866 if (unlikely(prof_on == KVM_PROFILING))
1867 profile_hit(KVM_PROFILING, (void *)vmcs_readl(GUEST_RIP));
1868
1862 kvm_run->exit_type = 0; 1869 kvm_run->exit_type = 0;
1863 if (fail) { 1870 if (fail) {
1864 kvm_run->exit_type = KVM_EXIT_TYPE_FAIL_ENTRY; 1871 kvm_run->exit_type = KVM_EXIT_TYPE_FAIL_ENTRY;