From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: Cheng Jiang <Cheng1.jiang@intel.com>, chenbo.xia@intel.com
Cc: dev@dpdk.org, Jiayu.Hu@intel.com, YvonneX.Yang@intel.com,
yinan.wang@intel.com
Subject: Re: [dpdk-dev] [PATCH v9 1/2] examples/vhost: add ioat ring space count and check
Date: Thu, 21 Jan 2021 13:34:50 +0100 [thread overview]
Message-ID: <47b8dd37-be4e-c35c-3c5b-1cfd260d9f51@redhat.com> (raw)
In-Reply-To: <20210112043857.19826-2-Cheng1.jiang@intel.com>
On 1/12/21 5:38 AM, Cheng Jiang wrote:
> 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. Add rte_ioat_completed_ops() fail handler.
>
> Signed-off-by: Cheng Jiang <Cheng1.jiang@intel.com>
> Reviewed-by: Jiayu Hu <jiayu.hu@intel.com>
> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> ---
> examples/vhost/ioat.c | 24 +++++++++++++-----------
> 1 file changed, 13 insertions(+), 11 deletions(-)
>
> diff --git a/examples/vhost/ioat.c b/examples/vhost/ioat.c
> index 71d8a1f1f..dbad28d43 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 {
> @@ -178,17 +176,21 @@ ioat_check_completed_copies_cb(int vid, uint16_t queue_id,
> {
> if (!opaque_data) {
> uintptr_t dump[255];
> - unsigned short n_seg;
> + int n_seg;
> unsigned short read, write;
> unsigned short nb_packet = 0;
> unsigned short mask = MAX_ENQUEUED_SIZE - 1;
> unsigned short i;
> +
> 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);
> - n_seg += cb_tracker[dev_id].last_remain;
> - if (!n_seg)
> + if (n_seg <= 0)
> return 0;
In a separate patch, it might make sense to propagate the error if
rte_ioat_completed_ops return -1.
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Maxime
> +
> + cb_tracker[dev_id].ioat_space += n_seg;
> + n_seg += cb_tracker[dev_id].last_remain;
> +
> read = cb_tracker[dev_id].next_read;
> write = cb_tracker[dev_id].next_write;
> for (i = 0; i < max_packets; i++) {
> --
> 2.29.2
>
next prev parent reply other threads:[~2021-01-21 12:35 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 ` [dpdk-dev] [PATCH v4 1/2] examples/vhost: add ioat ring space count and check Cheng Jiang
2020-12-28 2:50 ` 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 [this message]
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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