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From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: dev@dpdk.org, chenbo.xia@intel.com, david.marchand@redhat.com,
	i.maximets@ovn.org
Cc: Maxime Coquelin <maxime.coquelin@redhat.com>
Subject: [PATCH v2 5/5] vhost: add statistics for IOTLB
Date: Thu, 24 Mar 2022 13:46:38 +0100	[thread overview]
Message-ID: <20220324124638.32672-6-maxime.coquelin@redhat.com> (raw)
In-Reply-To: <20220324124638.32672-1-maxime.coquelin@redhat.com>

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(-)

diff --git a/lib/vhost/vhost.c b/lib/vhost/vhost.c
index 58b58fc40e..7f4fafdcb0 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..e876fc157b 100644
--- a/lib/vhost/vhost.h
+++ b/lib/vhost/vhost.h
@@ -134,6 +134,9 @@ 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;
 };
 
 /**
-- 
2.35.1


  parent reply	other threads:[~2022-03-24 12:47 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-24 12:46 [PATCH v2 0/5] vhost: introduce per-virtqueue stats API Maxime Coquelin
2022-03-24 12:46 ` [PATCH v2 1/5] vhost: fix missing virtqueue lock protection Maxime Coquelin
2022-03-28  8:07   ` David Marchand
2022-03-28 14:59     ` Maxime Coquelin
2022-03-24 12:46 ` [PATCH v2 2/5] vhost: add per-virtqueue statistics support Maxime Coquelin
2022-03-24 12:46 ` [PATCH v2 3/5] net/vhost: move to Vhost library stats API Maxime Coquelin
2022-04-25 12:06   ` Xia, Chenbo
2022-03-24 12:46 ` [PATCH v2 4/5] vhost: add statistics for guest notifications Maxime Coquelin
2022-04-25 12:09   ` Xia, Chenbo
2022-03-24 12:46 ` Maxime Coquelin [this message]
2022-04-25 12:10   ` [PATCH v2 5/5] vhost: add statistics for IOTLB Xia, Chenbo
2022-05-10 14:15     ` Maxime Coquelin

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