[dpdk-dev] [PATCH v2] examples/vhost: remove async inflight packet counter

[Cheng Jiang]

Remove async inflight packet counter since there is no need to keep
tracking it. Increase MAX_ENQUEUED_SIZE to prevent packet segment number
tracking ring from being exhausted.

Fixes: 63dabdeda690 ("examples/vhost: refactor vhost data path")

Signed-off-by: Cheng Jiang <Cheng1.jiang at intel.com>
---
v2: fixed a typo

 examples/vhost/ioat.h |  2 +-
 examples/vhost/main.c | 10 +---------
 examples/vhost/main.h |  1 -
 3 files changed, 2 insertions(+), 11 deletions(-)

diff --git a/examples/vhost/ioat.h b/examples/vhost/ioat.h
index 0a1dbb811..1aa28ed6a 100644
--- a/examples/vhost/ioat.h
+++ b/examples/vhost/ioat.h
@@ -11,7 +11,7 @@

 #define MAX_VHOST_DEVICE 1024
 #define IOAT_RING_SIZE 4096
-#define MAX_ENQUEUED_SIZE 512
+#define MAX_ENQUEUED_SIZE 4096

 struct dma_info {
 	struct rte_pci_addr addr;
diff --git a/examples/vhost/main.c b/examples/vhost/main.c
index 233a2dc6e..99e8d9c69 100644
--- a/examples/vhost/main.c
+++ b/examples/vhost/main.c
@@ -831,11 +831,8 @@ complete_async_pkts(struct vhost_dev *vdev)

 	complete_count = rte_vhost_poll_enqueue_completed(vdev->vid,
 					VIRTIO_RXQ, p_cpl, MAX_PKT_BURST);
-	if (complete_count) {
-		__atomic_sub_fetch(&vdev->nr_async_pkts, complete_count,
-			__ATOMIC_SEQ_CST);
+	if (complete_count)
 		free_pkts(p_cpl, complete_count);
-	}
 }

 static __rte_always_inline void
@@ -878,8 +875,6 @@ drain_vhost(struct vhost_dev *vdev)
 		complete_async_pkts(vdev);
 		ret = rte_vhost_submit_enqueue_burst(vdev->vid, VIRTIO_RXQ,
 					m, nr_xmit, m_cpu_cpl, &cpu_cpl_nr);
-		__atomic_add_fetch(&vdev->nr_async_pkts, ret - cpu_cpl_nr,
-				__ATOMIC_SEQ_CST);

 		if (cpu_cpl_nr)
 			free_pkts(m_cpu_cpl, cpu_cpl_nr);
@@ -1210,9 +1205,6 @@ drain_eth_rx(struct vhost_dev *vdev)
 		enqueue_count = rte_vhost_submit_enqueue_burst(vdev->vid,
 					VIRTIO_RXQ, pkts, rx_count,
 					m_cpu_cpl, &cpu_cpl_nr);
-		__atomic_add_fetch(&vdev->nr_async_pkts,
-					enqueue_count - cpu_cpl_nr,
-					__ATOMIC_SEQ_CST);
 		if (cpu_cpl_nr)
 			free_pkts(m_cpu_cpl, cpu_cpl_nr);

diff --git a/examples/vhost/main.h b/examples/vhost/main.h
index 2d6c05fd7..0ccdce4b4 100644
--- a/examples/vhost/main.h
+++ b/examples/vhost/main.h
@@ -51,7 +51,6 @@ struct vhost_dev {
 	uint64_t features;
 	size_t hdr_len;
 	uint16_t nr_vrings;
-	uint64_t nr_async_pkts;
 	struct rte_vhost_memory *mem;
 	struct device_statistics stats;
 	TAILQ_ENTRY(vhost_dev) global_vdev_entry;
--
2.29.2