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| author | Ingo Molnar <mingo@elte.hu> | 2007-01-10 23:15:38 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2007-01-11 18:18:21 -0800 |
| commit | 07031e14c1127fc7e1a5b98dfcc59f434e025104 (patch) | |
| tree | be4f545e674c529abb0f51c8b87e1f7137c9acb6 /drivers/kvm/vmx.c | |
| parent | e3881a6816b45668df60a426e5c3431ece1539a7 (diff) | |
| download | linux-07031e14c1127fc7e1a5b98dfcc59f434e025104.tar.gz linux-07031e14c1127fc7e1a5b98dfcc59f434e025104.tar.bz2 linux-07031e14c1127fc7e1a5b98dfcc59f434e025104.zip | |
[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.c | 7 |
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 @@ #include <linux/module.h> #include <linux/mm.h> #include <linux/highmem.h> +#include <linux/profile.h> #include <asm/io.h> #include <asm/desc.h> @@ -1859,6 +1860,12 @@ again: asm ("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS)); #endif + /* + * Profile KVM exit RIPs: + */ + if (unlikely(prof_on == KVM_PROFILING)) + profile_hit(KVM_PROFILING, (void *)vmcs_readl(GUEST_RIP)); + kvm_run->exit_type = 0; if (fail) { kvm_run->exit_type = KVM_EXIT_TYPE_FAIL_ENTRY; |