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authorStuart Yoder <stuart.yoder@freescale.com>2011-03-28 15:01:56 -0500
committerAvi Kivity <avi@redhat.com>2011-05-22 08:47:49 -0400
commit1a040b26c5c915b317103b87ae7006d40443f197 (patch)
tree264b19e5489bfc6baab352d5353a236784cf3008 /arch/powerpc
parent49ea06957bf637b28aa338fba26432d5bafdeb99 (diff)
downloadop-kernel-dev-1a040b26c5c915b317103b87ae7006d40443f197.zip
op-kernel-dev-1a040b26c5c915b317103b87ae7006d40443f197.tar.gz
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>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/kvm/timing.c21
1 files changed, 17 insertions, 4 deletions
diff --git a/arch/powerpc/kvm/timing.c b/arch/powerpc/kvm/timing.c
index 18f40fd..319177d 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;
}
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