From: Yongseok Koh <yskoh@mellanox.com>
To: Shahaf Shuler <shahafs@mellanox.com>
Cc: "Nélio Laranjeiro" <nelio.laranjeiro@6wind.com>,
"Adrien Mazarguil" <adrien.mazarguil@6wind.com>,
"dev@dpdk.org" <dev@dpdk.org>,
"stable@dpdk.org" <stable@dpdk.org>
Subject: Re: [dpdk-stable] [PATCH v4 4/4] net/mlx5: enforce Tx num of segments limitation
Date: Thu, 14 Sep 2017 08:05:25 +0000 [thread overview]
Message-ID: <31018994-DB44-486B-B880-579804057124@mellanox.com> (raw)
In-Reply-To: <VI1PR05MB314906722B51E9FC48BE8621C36F0@VI1PR05MB3149.eurprd05.prod.outlook.com>
Thanks!
Yongseok
> On Sep 13, 2017, at 10:23 PM, Shahaf Shuler <shahafs@mellanox.com> wrote:
>
> Hi Yongseok,
>
> Wednesday, September 13, 2017 10:52 PM, Yongseok Koh:
>>>
>>> +/* Maximum number of DS in WQE. */
>>> +#define MLX5_MAX_DS 63
>> How about make it consistent with MLX5_MPW_DSEG_MAX by naming
>> MLX5_DSEG_MAX?
>
> It doesn't have the same meaning.
>
> The MLX5_MPW_DSEG_MAX is to limit the number of mbuf segments (buf->nb_segs) for multi packet wqe. The inline part is taken into account differently.
> The MLX_MAX_DS is to limit the number data segments (i.e. MLX5_WQE_DWORD_SIZE) that could be set into a WQE. This includes everything (inline, ctrl seg, eth seg, pointers).
> For the regular Tx burst there are many options for different inline sizes which impact on the max number of mbuf segments possible.
I should've been clearer. I just suggested a small change from DS to DSEG as I thought DS and DSEG are same. But if it just comes from the field name in WQE Ctrl segment, MLX5_WQE_DS_MAX or MLX5_WQE_CTRL_DS_MAX could be good. I hoped it could be a little more explanatory. I'm not good at naming, will defer to you. :-)
> BTW - am still not sure why we have the MLX5_MPW_DSEG_MAX limitation.
I don't know either. We should discuss it with chip design.
Thanks
Yongseok
next prev parent reply other threads:[~2017-09-14 8:05 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-23 7:33 [dpdk-stable] [PATCH 1/2] net/mlx5: fix num seg assumption on vPMD Shahaf Shuler
2017-08-23 7:33 ` [dpdk-stable] [PATCH 2/2] net/mlx5: enforce Tx num of segments limitation Shahaf Shuler
2017-08-24 13:28 ` Nélio Laranjeiro
2017-08-24 13:23 ` [dpdk-stable] [PATCH 1/2] net/mlx5: fix num seg assumption on vPMD Nélio Laranjeiro
2017-08-30 7:07 ` [dpdk-stable] [PATCH v2 " Shahaf Shuler
2017-09-04 14:57 ` Nélio Laranjeiro
2017-09-11 12:50 ` [dpdk-stable] [PATCH v3 1/3] " Shahaf Shuler
2017-09-13 10:50 ` [dpdk-stable] [PATCH v4 1/4] " Shahaf Shuler
2017-09-14 10:50 ` [dpdk-stable] [PATCH v5 " Shahaf Shuler
2017-09-15 10:51 ` Ferruh Yigit
2017-09-14 10:50 ` [dpdk-stable] [PATCH v5 2/4] net/mlx5: fix Tx stats error counter definition Shahaf Shuler
2017-09-14 10:50 ` [dpdk-stable] [PATCH v5 3/4] net/mlx5: fix Tx stats error counter logic Shahaf Shuler
2017-09-14 10:50 ` [dpdk-stable] [PATCH v5 4/4] net/mlx5: enforce Tx num of segments limitation Shahaf Shuler
2017-09-14 19:21 ` Yongseok Koh
2017-09-15 8:11 ` Nélio Laranjeiro
2017-09-13 10:50 ` [dpdk-stable] [PATCH v4 2/4] net/mlx5: fix Tx stats error counter definition Shahaf Shuler
2017-09-13 17:59 ` Yongseok Koh
2017-09-14 8:11 ` Nélio Laranjeiro
2017-09-13 10:50 ` [dpdk-stable] [PATCH v4 3/4] net/mlx5: fix Tx stats error counter logic Shahaf Shuler
2017-09-13 18:17 ` Yongseok Koh
2017-09-14 8:12 ` Nélio Laranjeiro
2017-09-13 10:50 ` [dpdk-stable] [PATCH v4 4/4] net/mlx5: enforce Tx num of segments limitation Shahaf Shuler
2017-09-13 19:51 ` Yongseok Koh
2017-09-14 5:23 ` Shahaf Shuler
2017-09-14 8:05 ` Yongseok Koh [this message]
2017-09-11 12:50 ` [dpdk-stable] [PATCH v3 2/3] net/mlx5: fix Tx stats error counter Shahaf Shuler
2017-09-11 12:50 ` [dpdk-stable] [PATCH v3 3/3] net/mlx5: enforce Tx num of segments limitation Shahaf Shuler
2017-08-30 7:07 ` [dpdk-stable] [PATCH v2 2/2] " Shahaf Shuler
2017-09-04 14:57 ` Nélio Laranjeiro
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