[5/5] vhost: add statistics for IOTLB
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Commit Message
This patch adds statistics for IOTLB hits and misses.
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
lib/vhost/vhost.c | 10 +++++++++-
lib/vhost/vhost.h | 3 +++
2 files changed, 12 insertions(+), 1 deletion(-)
@@ -47,6 +47,8 @@ static const struct vhost_vq_stats_name_off vhost_vq_stat_strings[] = {
{"size_1024_1518_packets", offsetof(struct vhost_virtqueue, stats.size_bins[6])},
{"size_1519_max_packets", offsetof(struct vhost_virtqueue, stats.size_bins[7])},
{"guest_notifications", offsetof(struct vhost_virtqueue, stats.guest_notifications)},
+ {"iotlb_hits", offsetof(struct vhost_virtqueue, stats.iotlb_hits)},
+ {"iotlb_misses", offsetof(struct vhost_virtqueue, stats.iotlb_misses)},
};
#define VHOST_NB_VQ_STATS RTE_DIM(vhost_vq_stat_strings)
@@ -64,8 +66,14 @@ __vhost_iova_to_vva(struct virtio_net *dev, struct vhost_virtqueue *vq,
tmp_size = *size;
vva = vhost_user_iotlb_cache_find(vq, iova, &tmp_size, perm);
- if (tmp_size == *size)
+ if (tmp_size == *size) {
+ if (dev->flags & VIRTIO_DEV_STATS_ENABLED)
+ vq->stats.iotlb_hits++;
return vva;
+ }
+
+ if (dev->flags & VIRTIO_DEV_STATS_ENABLED)
+ vq->stats.iotlb_misses++;
iova += tmp_size;
@@ -132,6 +132,9 @@ struct virtqueue_stats {
/* Size bins in array as RFC 2819, undersized [0], 64 [1], etc */
uint64_t size_bins[8];
uint64_t guest_notifications;
+ uint64_t iotlb_hits;
+ uint64_t iotlb_misses;
+ uint64_t iotlb_errors;
};
/**