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From: Cheng Jiang <Cheng1.jiang@intel.com>
To: maxime.coquelin@redhat.com, chenbo.xia@intel.com
Cc: dev@dpdk.org, Jiayu.Hu@intel.com, YvonneX.Yang@intel.com,
	Cheng Jiang <Cheng1.jiang@intel.com>
Subject: [dpdk-dev] [PATCH v4 1/2] examples/vhost: add ioat ring space count and check
Date: Fri, 25 Dec 2020 08:07:11 +0000
Message-ID: <20201225080712.36177-2-Cheng1.jiang@intel.com> (raw)
In-Reply-To: <20201225080712.36177-1-Cheng1.jiang@intel.com>

Add ioat ring space count and check, if ioat ring space is not enough
for the next async vhost packet enqueue, then just return to prevent
enqueue failure.

Signed-off-by: Cheng Jiang <Cheng1.jiang@intel.com>
---
 examples/vhost/ioat.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/examples/vhost/ioat.c b/examples/vhost/ioat.c
index 71d8a1f1f..b0b04aa45 100644
--- a/examples/vhost/ioat.c
+++ b/examples/vhost/ioat.c
@@ -17,6 +17,7 @@ struct packet_tracker {
 	unsigned short next_read;
 	unsigned short next_write;
 	unsigned short last_remain;
+	unsigned short ioat_space;
 };
 
 struct packet_tracker cb_tracker[MAX_VHOST_DEVICE];
@@ -113,7 +114,7 @@ open_ioat(const char *value)
 			goto out;
 		}
 		rte_rawdev_start(dev_id);
-
+		cb_tracker[dev_id].ioat_space = IOAT_RING_SIZE;
 		dma_info->nr++;
 		i++;
 	}
@@ -140,13 +141,9 @@ ioat_transfer_data_cb(int vid, uint16_t queue_id,
 			src = descs[i_desc].src;
 			dst = descs[i_desc].dst;
 			i_seg = 0;
+			if (cb_tracker[dev_id].ioat_space < src->nr_segs)
+				break;
 			while (i_seg < src->nr_segs) {
-				/*
-				 * TODO: Assuming that the ring space of the
-				 * IOAT device is large enough, so there is no
-				 * error here, and the actual error handling
-				 * will be added later.
-				 */
 				rte_ioat_enqueue_copy(dev_id,
 					(uintptr_t)(src->iov[i_seg].iov_base)
 						+ src->offset,
@@ -158,7 +155,8 @@ ioat_transfer_data_cb(int vid, uint16_t queue_id,
 				i_seg++;
 			}
 			write &= mask;
-			cb_tracker[dev_id].size_track[write] = i_seg;
+			cb_tracker[dev_id].size_track[write] = src->nr_segs;
+			cb_tracker[dev_id].ioat_space -= src->nr_segs;
 			write++;
 		}
 	} else {
@@ -186,6 +184,7 @@ ioat_check_completed_copies_cb(int vid, uint16_t queue_id,
 		int dev_id = dma_bind[vid].dmas[queue_id * 2
 				+ VIRTIO_RXQ].dev_id;
 		n_seg = rte_ioat_completed_ops(dev_id, 255, dump, dump);
+		cb_tracker[dev_id].ioat_space += n_seg;
 		n_seg += cb_tracker[dev_id].last_remain;
 		if (!n_seg)
 			return 0;
-- 
2.29.2


  reply	other threads:[~2020-12-25  8:18 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-18 11:33 [dpdk-dev] [PATCH v1 0/3] examples/vhost: sample code refactor Cheng Jiang
2020-12-18 11:33 ` [dpdk-dev] [PATCH v1 1/3] examples/vhost: add ioat ring space count and check Cheng Jiang
2020-12-18 11:33 ` [dpdk-dev] [PATCH v1 2/3] examples/vhost: optimize vhost data path for batch Cheng Jiang
2020-12-18 11:33 ` [dpdk-dev] [PATCH v1 3/3] examples/vhost: refactor vhost async data path Cheng Jiang
2020-12-22  8:36 ` [dpdk-dev] [PATCH v2 0/2] examples/vhost: sample code refactor Cheng Jiang
2020-12-22  8:36   ` [dpdk-dev] [PATCH v2 1/2] examples/vhost: add ioat ring space count and check Cheng Jiang
2020-12-22  8:36   ` [dpdk-dev] [PATCH v2 2/2] examples/vhost: refactor vhost data path Cheng Jiang
2020-12-24  8:49 ` [dpdk-dev] [PATCH v3 0/2] examples/vhost: sample code refactor Cheng Jiang
2020-12-24  8:49   ` [dpdk-dev] [PATCH v3 1/2] examples/vhost: add ioat ring space count and check Cheng Jiang
2020-12-24  8:49   ` [dpdk-dev] [PATCH v3 2/2] examples/vhost: refactor vhost data path Cheng Jiang
2020-12-25  8:07 ` [dpdk-dev] [PATCH v4 0/2] examples/vhost: sample code refactor Cheng Jiang
2020-12-25  8:07   ` Cheng Jiang [this message]
2020-12-28  2:50     ` [dpdk-dev] [PATCH v4 1/2] examples/vhost: add ioat ring space count and check Hu, Jiayu
2020-12-28  8:08       ` Jiang, Cheng1
2020-12-25  8:07   ` [dpdk-dev] [PATCH v4 2/2] examples/vhost: refactor vhost data path Cheng Jiang
2020-12-28  4:03     ` Hu, Jiayu
2020-12-28  8:21       ` Jiang, Cheng1
2020-12-28  7:16 ` [dpdk-dev] [PATCH v5 0/2] examples/vhost: sample code refactor Cheng Jiang
2020-12-28  7:16   ` [dpdk-dev] [PATCH v5 1/2] examples/vhost: add ioat ring space count and check Cheng Jiang
2020-12-28  7:16   ` [dpdk-dev] [PATCH v5 2/2] examples/vhost: refactor vhost data path Cheng Jiang
2021-01-04  4:57 ` [dpdk-dev] [PATCH v6 0/2] examples/vhost: sample code refactor Cheng Jiang
2021-01-04  4:57   ` [dpdk-dev] [PATCH v6 1/2] examples/vhost: add ioat ring space count and check Cheng Jiang
2021-01-05  1:19     ` Hu, Jiayu
2021-01-05  1:51       ` Jiang, Cheng1
2021-01-04  4:57   ` [dpdk-dev] [PATCH v6 2/2] examples/vhost: refactor vhost data path Cheng Jiang
2021-01-05  1:43     ` Hu, Jiayu
2021-01-05  2:15 ` [dpdk-dev] [PATCH v7 0/2] examples/vhost: sample code refactor Cheng Jiang
2021-01-05  2:15   ` [dpdk-dev] [PATCH v7 1/2] examples/vhost: add ioat ring space count and check Cheng Jiang
2021-01-05  6:56     ` Hu, Jiayu
2021-01-05  2:15   ` [dpdk-dev] [PATCH v7 2/2] examples/vhost: refactor vhost data path Cheng Jiang
2021-01-06  7:47   ` [dpdk-dev] [PATCH v7 0/2] examples/vhost: sample code refactor Ling, WeiX
2021-01-11  5:52 ` [dpdk-dev] [PATCH v8 " Cheng Jiang
2021-01-11  5:52   ` [dpdk-dev] [PATCH v8 1/2] examples/vhost: add ioat ring space count and check Cheng Jiang
2021-01-11 14:15     ` Maxime Coquelin
2021-01-11  5:52   ` [dpdk-dev] [PATCH v8 2/2] examples/vhost: refactor vhost data path Cheng Jiang
2021-01-11 14:25     ` Maxime Coquelin
2021-01-12  4:51       ` Jiang, Cheng1
2021-01-12  4:38 ` [dpdk-dev] [PATCH v9 0/2] examples/vhost: sample code refactor Cheng Jiang
2021-01-12  4:38   ` [dpdk-dev] [PATCH v9 1/2] examples/vhost: add ioat ring space count and check Cheng Jiang
2021-01-21 12:34     ` Maxime Coquelin
2021-01-22  2:16       ` Jiang, Cheng1
2021-01-12  4:38   ` [dpdk-dev] [PATCH v9 2/2] examples/vhost: refactor vhost data path Cheng Jiang
2021-01-21 12:39     ` Maxime Coquelin
2021-01-27 12:00   ` [dpdk-dev] [PATCH v9 0/2] examples/vhost: sample code refactor Maxime Coquelin

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