diff mbox series

[2/4] examples/vhost: refactor vhost enqueue and dequeue datapaths

Message ID 20210906204837.112466-3-wenwux.ma@intel.com (mailing list archive)
State Superseded, archived
Delegated to: Maxime Coquelin
Headers
Series support async dequeue for split ring |

Checks

Context Check Description
ci/checkpatch success coding style OK

Commit Message

Ma, WenwuX Sept. 6, 2021, 8:48 p.m. UTC 
  Previously, by judging the flag, we call different enqueue/dequeue
functions in data path.

Now, we use an ops that was initialized when Vhost was created,
so that we can call ops directly in Vhost data path without any more
flag judgment.

Signed-off-by: Wenwu Ma <wenwux.ma@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
 examples/vhost/main.c       | 100 +++++++++++++++++++++---------------
 examples/vhost/main.h       |  31 +++++++++--
 examples/vhost/virtio_net.c |  16 +++++-
 3 files changed, 101 insertions(+), 46 deletions(-)

Comments

Yang, YvonneX Sept. 10, 2021, 7:38 a.m. UTC | #1 
> -----Original Message-----
> From: Ma, WenwuX <wenwux.ma@intel.com>
> Sent: Tuesday, September 7, 2021 4:49 AM
> To: dev@dpdk.org
> Cc: maxime.coquelin@redhat.com; Xia, Chenbo <chenbo.xia@intel.com>;
> Jiang, Cheng1 <cheng1.jiang@intel.com>; Hu, Jiayu <jiayu.hu@intel.com>;
> Pai G, Sunil <sunil.pai.g@intel.com>; Yang, YvonneX
> <yvonnex.yang@intel.com>; Ma, WenwuX <wenwux.ma@intel.com>
> Subject: [PATCH 2/4] examples/vhost: refactor vhost enqueue and dequeue
> datapaths
> 
> Previously, by judging the flag, we call different enqueue/dequeue functions
> in data path.
> 
> Now, we use an ops that was initialized when Vhost was created, so that we
> can call ops directly in Vhost data path without any more flag judgment.
> 
> Signed-off-by: Wenwu Ma <wenwux.ma@intel.com>
> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> ---
>  examples/vhost/main.c       | 100 +++++++++++++++++++++---------------
>  examples/vhost/main.h       |  31 +++++++++--
>  examples/vhost/virtio_net.c |  16 +++++-
>  3 files changed, 101 insertions(+), 46 deletions(-)
> 

Tested-by: Yvonne Yang <yvonnex.yang@intel.com>
Chenbo Xia Sept. 15, 2021, 3:02 a.m. UTC | #2 
Hi,

> -----Original Message-----
> From: Ma, WenwuX <wenwux.ma@intel.com>
> Sent: Tuesday, September 7, 2021 4:49 AM
> To: dev@dpdk.org
> Cc: maxime.coquelin@redhat.com; Xia, Chenbo <chenbo.xia@intel.com>; Jiang,
> Cheng1 <cheng1.jiang@intel.com>; Hu, Jiayu <jiayu.hu@intel.com>; Pai G, Sunil
> <sunil.pai.g@intel.com>; Yang, YvonneX <yvonnex.yang@intel.com>; Ma, WenwuX
> <wenwux.ma@intel.com>
> Subject: [PATCH 2/4] examples/vhost: refactor vhost enqueue and dequeue
> datapaths
> 
> Previously, by judging the flag, we call different enqueue/dequeue
> functions in data path.
> 
> Now, we use an ops that was initialized when Vhost was created,
> so that we can call ops directly in Vhost data path without any more
> flag judgment.
> 
> Signed-off-by: Wenwu Ma <wenwux.ma@intel.com>
> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> ---
>  examples/vhost/main.c       | 100 +++++++++++++++++++++---------------
>  examples/vhost/main.h       |  31 +++++++++--
>  examples/vhost/virtio_net.c |  16 +++++-
>  3 files changed, 101 insertions(+), 46 deletions(-)
> 
> diff --git a/examples/vhost/main.c b/examples/vhost/main.c
> index a4a8214e05..e246b640ea 100644
> --- a/examples/vhost/main.c
> +++ b/examples/vhost/main.c
> @@ -106,6 +106,8 @@ static uint32_t burst_rx_retry_num = BURST_RX_RETRIES;
>  static char *socket_files;

[...]

> 
> @@ -87,7 +100,19 @@ void vs_vhost_net_remove(struct vhost_dev *dev);
>  uint16_t vs_enqueue_pkts(struct vhost_dev *dev, uint16_t queue_id,
>  			 struct rte_mbuf **pkts, uint32_t count);
> 
> -uint16_t vs_dequeue_pkts(struct vhost_dev *dev, uint16_t queue_id,
> -			 struct rte_mempool *mbuf_pool,
> -			 struct rte_mbuf **pkts, uint16_t count);
> +uint16_t builtin_enqueue_pkts(struct vhost_dev *dev, uint16_t queue_id,
> +			struct rte_mbuf **pkts, uint32_t count);
> +uint16_t builtin_dequeue_pkts(struct vhost_dev *dev, uint16_t queue_id,
> +			struct rte_mempool *mbuf_pool,
> +			struct rte_mbuf **pkts, uint16_t count);
> +uint16_t sync_enqueue_pkts(struct vhost_dev *dev, uint16_t queue_id,
> +			 struct rte_mbuf **pkts, uint32_t count);
> +uint16_t sync_dequeue_pkts(struct vhost_dev *dev, uint16_t queue_id,
> +			struct rte_mempool *mbuf_pool,
> +			struct rte_mbuf **pkts, uint16_t count);
> +uint16_t async_enqueue_pkts(struct vhost_dev *dev, uint16_t queue_id,
> +			 struct rte_mbuf **pkts, uint32_t count);
> +uint16_t async_dequeue_pkts(struct vhost_dev *dev, uint16_t queue_id,
> +			struct rte_mempool *mbuf_pool,
> +			struct rte_mbuf **pkts, uint16_t count);

This func is defined in the 4th. So please remove it here.

Thanks,
Chenbo
diff mbox series

Patch

diff --git a/examples/vhost/main.c b/examples/vhost/main.c
index a4a8214e05..e246b640ea 100644
--- a/examples/vhost/main.c
+++ b/examples/vhost/main.c
@@ -106,6 +106,8 @@  static uint32_t burst_rx_retry_num = BURST_RX_RETRIES;
 static char *socket_files;
 static int nb_sockets;
 
+static struct vhost_queue_ops vdev_queue_ops[MAX_VHOST_DEVICE];
+
 /* empty vmdq configuration structure. Filled in programatically */
 static struct rte_eth_conf vmdq_conf_default = {
 	.rxmode = {
@@ -888,22 +890,8 @@  drain_vhost(struct vhost_dev *vdev)
 	uint16_t nr_xmit = vhost_txbuff[buff_idx]->len;
 	struct rte_mbuf **m = vhost_txbuff[buff_idx]->m_table;
 
-	if (builtin_net_driver) {
-		ret = vs_enqueue_pkts(vdev, VIRTIO_RXQ, m, nr_xmit);
-	} else if (async_vhost_driver) {
-		uint16_t enqueue_fail = 0;
-
-		complete_async_pkts(vdev);
-		ret = rte_vhost_submit_enqueue_burst(vdev->vid, VIRTIO_RXQ, m, nr_xmit);
-		__atomic_add_fetch(&vdev->pkts_inflight, ret, __ATOMIC_SEQ_CST);
-
-		enqueue_fail = nr_xmit - ret;
-		if (enqueue_fail)
-			free_pkts(&m[ret], nr_xmit - ret);
-	} else {
-		ret = rte_vhost_enqueue_burst(vdev->vid, VIRTIO_RXQ,
-						m, nr_xmit);
-	}
+	ret = vdev_queue_ops[vdev->vid].enqueue_pkt_burst(vdev,
+					VIRTIO_RXQ, m, nr_xmit);
 
 	if (enable_stats) {
 		__atomic_add_fetch(&vdev->stats.rx_total_atomic, nr_xmit,
@@ -1182,6 +1170,33 @@  drain_mbuf_table(struct mbuf_table *tx_q)
 	}
 }
 
+uint16_t
+async_enqueue_pkts(struct vhost_dev *vdev, uint16_t queue_id,
+		struct rte_mbuf **pkts, uint32_t rx_count)
+{
+	uint16_t enqueue_count;
+	uint16_t enqueue_fail = 0;
+
+	complete_async_pkts(vdev);
+	enqueue_count = rte_vhost_submit_enqueue_burst(vdev->vid,
+				queue_id, pkts, rx_count);
+	__atomic_add_fetch(&vdev->pkts_inflight, enqueue_count,
+					__ATOMIC_SEQ_CST);
+
+	enqueue_fail = rx_count - enqueue_count;
+	if (enqueue_fail)
+		free_pkts(&pkts[enqueue_count], enqueue_fail);
+
+	return enqueue_count;
+}
+
+uint16_t
+sync_enqueue_pkts(struct vhost_dev *vdev, uint16_t queue_id,
+		struct rte_mbuf **pkts, uint32_t rx_count)
+{
+	return rte_vhost_enqueue_burst(vdev->vid, queue_id, pkts, rx_count);
+}
+
 static __rte_always_inline void
 drain_eth_rx(struct vhost_dev *vdev)
 {
@@ -1212,25 +1227,8 @@  drain_eth_rx(struct vhost_dev *vdev)
 		}
 	}
 
-	if (builtin_net_driver) {
-		enqueue_count = vs_enqueue_pkts(vdev, VIRTIO_RXQ,
-						pkts, rx_count);
-	} else if (async_vhost_driver) {
-		uint16_t enqueue_fail = 0;
-
-		complete_async_pkts(vdev);
-		enqueue_count = rte_vhost_submit_enqueue_burst(vdev->vid,
-					VIRTIO_RXQ, pkts, rx_count);
-		__atomic_add_fetch(&vdev->pkts_inflight, enqueue_count, __ATOMIC_SEQ_CST);
-
-		enqueue_fail = rx_count - enqueue_count;
-		if (enqueue_fail)
-			free_pkts(&pkts[enqueue_count], enqueue_fail);
-
-	} else {
-		enqueue_count = rte_vhost_enqueue_burst(vdev->vid, VIRTIO_RXQ,
-						pkts, rx_count);
-	}
+	enqueue_count = vdev_queue_ops[vdev->vid].enqueue_pkt_burst(vdev,
+						VIRTIO_RXQ, pkts, rx_count);
 
 	if (enable_stats) {
 		__atomic_add_fetch(&vdev->stats.rx_total_atomic, rx_count,
@@ -1243,6 +1241,14 @@  drain_eth_rx(struct vhost_dev *vdev)
 		free_pkts(pkts, rx_count);
 }
 
+uint16_t sync_dequeue_pkts(struct vhost_dev *dev, uint16_t queue_id,
+			struct rte_mempool *mbuf_pool,
+			struct rte_mbuf **pkts, uint16_t count)
+{
+	return rte_vhost_dequeue_burst(dev->vid, queue_id,
+					mbuf_pool, pkts, count);
+}
+
 static __rte_always_inline void
 drain_virtio_tx(struct vhost_dev *vdev)
 {
@@ -1250,13 +1256,8 @@  drain_virtio_tx(struct vhost_dev *vdev)
 	uint16_t count;
 	uint16_t i;
 
-	if (builtin_net_driver) {
-		count = vs_dequeue_pkts(vdev, VIRTIO_TXQ, mbuf_pool,
-					pkts, MAX_PKT_BURST);
-	} else {
-		count = rte_vhost_dequeue_burst(vdev->vid, VIRTIO_TXQ,
-					mbuf_pool, pkts, MAX_PKT_BURST);
-	}
+	count = vdev_queue_ops[vdev->vid].dequeue_pkt_burst(vdev,
+				VIRTIO_TXQ, mbuf_pool, pkts, MAX_PKT_BURST);
 
 	/* setup VMDq for the first packet */
 	if (unlikely(vdev->ready == DEVICE_MAC_LEARNING) && count) {
@@ -1441,6 +1442,21 @@  new_device(int vid)
 		}
 	}
 
+	if (builtin_net_driver) {
+		vdev_queue_ops[vid].enqueue_pkt_burst = builtin_enqueue_pkts;
+		vdev_queue_ops[vid].dequeue_pkt_burst = builtin_dequeue_pkts;
+	} else {
+		if (async_vhost_driver) {
+			vdev_queue_ops[vid].enqueue_pkt_burst =
+							async_enqueue_pkts;
+		} else {
+			vdev_queue_ops[vid].enqueue_pkt_burst =
+							sync_enqueue_pkts;
+		}
+
+		vdev_queue_ops[vid].dequeue_pkt_burst = sync_dequeue_pkts;
+	}
+
 	if (builtin_net_driver)
 		vs_vhost_net_setup(vdev);
 
diff --git a/examples/vhost/main.h b/examples/vhost/main.h
index e7b1ac60a6..948a23efa6 100644
--- a/examples/vhost/main.h
+++ b/examples/vhost/main.h
@@ -61,6 +61,19 @@  struct vhost_dev {
 	struct vhost_queue queues[MAX_QUEUE_PAIRS * 2];
 } __rte_cache_aligned;
 
+typedef uint16_t (*vhost_enqueue_burst_t)(struct vhost_dev *dev,
+			uint16_t queue_id, struct rte_mbuf **pkts,
+			uint32_t count);
+
+typedef uint16_t (*vhost_dequeue_burst_t)(struct vhost_dev *dev,
+			uint16_t queue_id, struct rte_mempool *mbuf_pool,
+			struct rte_mbuf **pkts, uint16_t count);
+
+struct vhost_queue_ops {
+	vhost_enqueue_burst_t enqueue_pkt_burst;
+	vhost_dequeue_burst_t dequeue_pkt_burst;
+};
+
 TAILQ_HEAD(vhost_dev_tailq_list, vhost_dev);
 
 
@@ -87,7 +100,19 @@  void vs_vhost_net_remove(struct vhost_dev *dev);
 uint16_t vs_enqueue_pkts(struct vhost_dev *dev, uint16_t queue_id,
 			 struct rte_mbuf **pkts, uint32_t count);
 
-uint16_t vs_dequeue_pkts(struct vhost_dev *dev, uint16_t queue_id,
-			 struct rte_mempool *mbuf_pool,
-			 struct rte_mbuf **pkts, uint16_t count);
+uint16_t builtin_enqueue_pkts(struct vhost_dev *dev, uint16_t queue_id,
+			struct rte_mbuf **pkts, uint32_t count);
+uint16_t builtin_dequeue_pkts(struct vhost_dev *dev, uint16_t queue_id,
+			struct rte_mempool *mbuf_pool,
+			struct rte_mbuf **pkts, uint16_t count);
+uint16_t sync_enqueue_pkts(struct vhost_dev *dev, uint16_t queue_id,
+			 struct rte_mbuf **pkts, uint32_t count);
+uint16_t sync_dequeue_pkts(struct vhost_dev *dev, uint16_t queue_id,
+			struct rte_mempool *mbuf_pool,
+			struct rte_mbuf **pkts, uint16_t count);
+uint16_t async_enqueue_pkts(struct vhost_dev *dev, uint16_t queue_id,
+			 struct rte_mbuf **pkts, uint32_t count);
+uint16_t async_dequeue_pkts(struct vhost_dev *dev, uint16_t queue_id,
+			struct rte_mempool *mbuf_pool,
+			struct rte_mbuf **pkts, uint16_t count);
 #endif /* _MAIN_H_ */
diff --git a/examples/vhost/virtio_net.c b/examples/vhost/virtio_net.c
index 9064fc3a82..2432a96566 100644
--- a/examples/vhost/virtio_net.c
+++ b/examples/vhost/virtio_net.c
@@ -238,6 +238,13 @@  vs_enqueue_pkts(struct vhost_dev *dev, uint16_t queue_id,
 	return count;
 }
 
+uint16_t
+builtin_enqueue_pkts(struct vhost_dev *dev, uint16_t queue_id,
+		struct rte_mbuf **pkts, uint32_t count)
+{
+	return vs_enqueue_pkts(dev, queue_id, pkts, count);
+}
+
 static __rte_always_inline int
 dequeue_pkt(struct vhost_dev *dev, struct rte_vhost_vring *vr,
 	    struct rte_mbuf *m, uint16_t desc_idx,
@@ -363,7 +370,7 @@  dequeue_pkt(struct vhost_dev *dev, struct rte_vhost_vring *vr,
 	return 0;
 }
 
-uint16_t
+static uint16_t
 vs_dequeue_pkts(struct vhost_dev *dev, uint16_t queue_id,
 	struct rte_mempool *mbuf_pool, struct rte_mbuf **pkts, uint16_t count)
 {
@@ -440,3 +447,10 @@  vs_dequeue_pkts(struct vhost_dev *dev, uint16_t queue_id,
 
 	return i;
 }
+
+uint16_t
+builtin_dequeue_pkts(struct vhost_dev *dev, uint16_t queue_id,
+	struct rte_mempool *mbuf_pool, struct rte_mbuf **pkts, uint16_t count)
+{
+	return vs_dequeue_pkts(dev, queue_id, mbuf_pool, pkts, count);
+}