KVM: PPC: use ticks, not usecs, for exit timing

Convert to microseconds when displaying
(with fix from Bharat Bhushan <Bharat.Bhushan@freescale.com>).

This reduces rounding error with large quantities of short exits.

Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

1 files changed, 17 insertions, 4 deletions

diff --git a/arch/powerpc/kvm/timing.c b/arch/powerpc/kvm/timing.c
index 18f40fd3e98f..319177df9587 100644
--- a/arch/powerpc/kvm/timing.c
+++ b/arch/powerpc/kvm/timing.c
@@ -151,17 +151,30 @@ static int kvmppc_exit_timing_show(struct seq_file *m, void *private)
 {
         struct kvm_vcpu *vcpu = m->private;
         int i;
+        u64 min, max, sum, sum_quad;
 
         seq_printf(m, "%s", "type       count   min     max     sum     sum_squared\n");
 
+
         for (i = 0; i < __NUMBER_OF_KVM_EXIT_TYPES; i++) {
+
+                min = vcpu->arch.timing_min_duration[i];
+                do_div(min, tb_ticks_per_usec);
+                max = vcpu->arch.timing_max_duration[i];
+                do_div(max, tb_ticks_per_usec);
+                sum = vcpu->arch.timing_sum_duration[i];
+                do_div(sum, tb_ticks_per_usec);
+                sum_quad = vcpu->arch.timing_sum_quad_duration[i];
+                do_div(sum_quad, tb_ticks_per_usec);
+
                 seq_printf(m, "%12s     %10d    %10lld  %10lld  %20lld  %20lld\n",
                         kvm_exit_names[i],
                         vcpu->arch.timing_count_type[i],
-                        vcpu->arch.timing_min_duration[i],
-                        vcpu->arch.timing_max_duration[i],
-                        vcpu->arch.timing_sum_duration[i],
-                        vcpu->arch.timing_sum_quad_duration[i]);
+                        min,
+                        max,
+                        sum,
+                        sum_quad);
+
         }
         return 0;
 }