diff mbox series

[4/5] vhost: add statistics for IOTLB

Message ID 20220510201720.1262368-5-maxime.coquelin@redhat.com (mailing list archive)
State Accepted, archived
Delegated to: Maxime Coquelin
Headers
Series vhost: introduce per-virtqueue stats API |

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Maxime Coquelin May 10, 2022, 8:17 p.m. UTC 
  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 |  2 ++
 2 files changed, 11 insertions(+), 1 deletion(-)

Comments

Chenbo Xia May 11, 2022, 1:56 p.m. UTC | #1 
> -----Original Message-----
> From: Maxime Coquelin <maxime.coquelin@redhat.com>
> Sent: Wednesday, May 11, 2022 4:17 AM
> To: dev@dpdk.org; Xia, Chenbo <chenbo.xia@intel.com>;
> david.marchand@redhat.com; i.maximets@ovn.org
> Cc: Maxime Coquelin <maxime.coquelin@redhat.com>
> Subject: [PATCH 4/5] vhost: add statistics for IOTLB
> 
> 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 |  2 ++
>  2 files changed, 11 insertions(+), 1 deletion(-)
> 
> diff --git a/lib/vhost/vhost.c b/lib/vhost/vhost.c
> index fa708c1f9c..721b3a3247 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;
>  };
> 
>  /**
> --
> 2.35.1

Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>
diff mbox series

Patch

diff --git a/lib/vhost/vhost.c b/lib/vhost/vhost.c
index fa708c1f9c..721b3a3247 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;
 };
 
 /**