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| author | Stuart Yoder <stuart.yoder@freescale.com> | 2011-03-28 15:01:56 -0500 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-05-22 08:47:49 -0400 |
| commit | 1a040b26c5c915b317103b87ae7006d40443f197 (patch) | |
| tree | 264b19e5489bfc6baab352d5353a236784cf3008 /arch/powerpc/kvm | |
| parent | 49ea06957bf637b28aa338fba26432d5bafdeb99 (diff) | |
| download | linux-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/kvm')
| -rw-r--r-- | arch/powerpc/kvm/timing.c | 21 |
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; } |