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Diffstat (limited to 'arch/powerpc/kvm/timing.c')
-rw-r--r--arch/powerpc/kvm/timing.c31
1 files changed, 24 insertions, 7 deletions
diff --git a/arch/powerpc/kvm/timing.c b/arch/powerpc/kvm/timing.c
index a021f5827a3..319177df958 100644
--- a/arch/powerpc/kvm/timing.c
+++ b/arch/powerpc/kvm/timing.c
@@ -34,8 +34,8 @@ void kvmppc_init_timing_stats(struct kvm_vcpu *vcpu)
{
int i;
- /* pause guest execution to avoid concurrent updates */
- mutex_lock(&vcpu->mutex);
+ /* Take a lock to avoid concurrent updates */
+ mutex_lock(&vcpu->arch.exit_timing_lock);
vcpu->arch.last_exit_type = 0xDEAD;
for (i = 0; i < __NUMBER_OF_KVM_EXIT_TYPES; i++) {
@@ -49,7 +49,7 @@ void kvmppc_init_timing_stats(struct kvm_vcpu *vcpu)
vcpu->arch.timing_exit.tv64 = 0;
vcpu->arch.timing_last_enter.tv64 = 0;
- mutex_unlock(&vcpu->mutex);
+ mutex_unlock(&vcpu->arch.exit_timing_lock);
}
static void add_exit_timing(struct kvm_vcpu *vcpu, u64 duration, int type)
@@ -65,6 +65,8 @@ static void add_exit_timing(struct kvm_vcpu *vcpu, u64 duration, int type)
return;
}
+ mutex_lock(&vcpu->arch.exit_timing_lock);
+
vcpu->arch.timing_count_type[type]++;
/* sum */
@@ -93,6 +95,8 @@ static void add_exit_timing(struct kvm_vcpu *vcpu, u64 duration, int type)
vcpu->arch.timing_min_duration[type] = duration;
if (unlikely(duration > vcpu->arch.timing_max_duration[type]))
vcpu->arch.timing_max_duration[type] = duration;
+
+ mutex_unlock(&vcpu->arch.exit_timing_lock);
}
void kvmppc_update_timing_stats(struct kvm_vcpu *vcpu)
@@ -147,17 +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;
}