From: Yuanhan Liu <yliu@fridaylinux.org>
To: Zhiyong Yang <zhiyong.yang@intel.com>
Cc: dev@dpdk.org, maxime.coquelin@redhat.com, jianfeng.tan@intel.com
Subject: Re: [dpdk-dev] [PATCH] net/virtio: fix wrong TX pkt length stats
Date: Tue, 17 Oct 2017 21:21:15 +0800 [thread overview]
Message-ID: <20171017132114.GX1545@yliu-home> (raw)
In-Reply-To: <20171011043935.16813-1-zhiyong.yang@intel.com>
On Wed, Oct 11, 2017 at 12:39:35PM +0800, Zhiyong Yang wrote:
> In the function virtqueue_enqueue_xmit(), when can_push == 1 is true,
> vtnet_hdr_size is added to pkt_len by calling rte_pktmbuf_prepend.
> So, virtio header len should be subtracted before calling stats
> function.
Nice catch!
> Fixes: 58169a9c8153 ("net/virtio: support Tx checksum offload")
It should also Cc stable.
> Signed-off-by: Zhiyong Yang <zhiyong.yang@intel.com>
> ---
> drivers/net/virtio/virtio_rxtx.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c
> index 609b4138a..bf14f9a99 100644
> --- a/drivers/net/virtio/virtio_rxtx.c
> +++ b/drivers/net/virtio/virtio_rxtx.c
> @@ -1079,6 +1079,12 @@ virtio_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
> /* Enqueue Packet buffers */
> virtqueue_enqueue_xmit(txvq, txm, slots, use_indirect, can_push);
>
> + /* In function virtqueue_enqueue_xmit(), when can_push == 1
Hmm..., why not modifying it directly in virtqueue_enqueue_xmit()?
--yliu
> + * is true, vtnet_hdr_size is added to pkt_len of mbuf. So, it
> + * should be subtracted before calling stats function.
> + */
> + if (can_push == 1)
> + txm->pkt_len -= txvq->vq->hw->vtnet_hdr_size;
> txvq->stats.bytes += txm->pkt_len;
> virtio_update_packet_stats(&txvq->stats, txm);
> }
> --
> 2.13.3
next prev parent reply other threads:[~2017-10-17 13:21 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-11 4:39 Zhiyong Yang
2017-10-13 10:06 ` Maxime Coquelin
2017-10-13 12:44 ` Yang, Zhiyong
2017-10-13 12:47 ` Maxime Coquelin
2017-10-17 13:21 ` Yuanhan Liu [this message]
2017-10-23 6:40 ` [dpdk-dev] [PATCH v2] " Zhiyong Yang
2017-10-23 13:21 ` Yuanhan Liu
2017-10-24 2:05 ` Yang, Zhiyong
2017-10-24 3:06 ` [dpdk-dev] [PATCH v3] " Zhiyong Yang
2017-10-24 8:46 ` Yuanhan Liu
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