linux-kernel - [PATCH v3 1/4] virtio_test: kick vhost for a batch of descriptors

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Message-Id: <20220709022745.21020-2-qtxuning1999@sjtu.edu.cn>
Date:   Sat,  9 Jul 2022 10:27:42 +0800
From:   Guo Zhi <qtxuning1999@...u.edu.cn>
To:     jasowang@...hat.com, mst@...hat.com
Cc:     eperezma@...hat.com, virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, sgarzare@...hat.com,
        Guo Zhi <qtxuning1999@...u.edu.cn>
Subject: [PATCH v3 1/4] virtio_test: kick vhost for a batch of descriptors

Only kick vhost when the batch finishes.

Signed-off-by: Guo Zhi <qtxuning1999@...u.edu.cn>
---
 tools/virtio/virtio_test.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/tools/virtio/virtio_test.c b/tools/virtio/virtio_test.c
index 23f142af5..95f78b311 100644
--- a/tools/virtio/virtio_test.c
+++ b/tools/virtio/virtio_test.c
@@ -208,11 +208,10 @@ static void run_test(struct vdev_info *dev, struct vq_info *vq,
 				}
 
 				++started;
-
-				if (unlikely(!virtqueue_kick(vq->vq))) {
-					r = -1;
-					break;
-				}
+			}
+			if (unlikely(!virtqueue_kick(vq->vq))) {
+				r = -1;
+				break;
 			}
 
 			if (started >= bufs)
-- 
2.17.1