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Commit 1a040b26 authored by Stuart Yoder's avatar Stuart Yoder Committed by Avi Kivity
Browse files

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: default avatarStuart Yoder <stuart.yoder@freescale.com>
Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
parent 49ea0695

arch/powerpc/kvm/timing.c

+17 −4
Original line number Diff line number Diff line
@@ -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;

}