From 7247b7464ef98533c7f1bb8cd3042571d7358023 Mon Sep 17 00:00:00 2001 From: Maxime Coquelin Date: Tue, 10 May 2022 22:17:19 +0200 Subject: [PATCH] vhost: add statistics for IOTLB This patch adds statistics for IOTLB hits and misses. Signed-off-by: Maxime Coquelin Reviewed-by: Chenbo Xia --- lib/vhost/vhost.c | 10 +++++++++- lib/vhost/vhost.h | 2 ++ 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/lib/vhost/vhost.c b/lib/vhost/vhost.c index 1814599aaf..42e4b8a127 100644 --- a/lib/vhost/vhost.c +++ b/lib/vhost/vhost.c @@ -43,6 +43,8 @@ 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) @@ -60,8 +62,14 @@ __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; diff --git a/lib/vhost/vhost.h b/lib/vhost/vhost.h index 13c5c2266d..872675207e 100644 --- a/lib/vhost/vhost.h +++ b/lib/vhost/vhost.h @@ -134,6 +134,8 @@ 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; }; /** -- 2.39.5