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From: Kevin Traynor <ktraynor@redhat.com>
To: Yongseok Koh <yskoh@mellanox.com>
Cc: stable@dpdk.org, shahafs@mellanox.com
Subject: Re: [dpdk-stable] [PATCH 18.11] net/mlx5: fix instruction hotspot on replenishing Rx buffer
Date: Wed, 1 May 2019 10:42:58 +0100	[thread overview]
Message-ID: <7ce2c6b9-17af-f75f-14b4-cd644835eae0@redhat.com> (raw)
In-Reply-To: <20190430202227.36167-1-yskoh@mellanox.com>

On 30/04/2019 21:22, Yongseok Koh wrote:
> On replenishing Rx buffers for vectorized Rx, mbuf->buf_addr isn't needed
> to be accessed as it is static and easily calculated from the mbuf address.
> Accessing the mbuf content causes unnecessary load stall. non-x86
> processors (mostly RISC such as ARM and Power) are more vulnerable to load
> stall. For x86, reducing the number of instructions seems to matter most.
> 
> Fixes: 545b884b1da3 ("net/mlx5: fix buffer address posting in SSE Rx")
> 
> Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
> Acked-by: Shahaf Shuler <shahafs@mellanox.com>

Thanks. Added a reference to the dpdk master commits in the commit msg
and queued for 18.11 stable branch. Will push to dpdk-stable next week
as part of next batch.

  reply	other threads:[~2019-05-01  9:43 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-30 20:22 Yongseok Koh
2019-05-01  9:42 ` Kevin Traynor [this message]
  -- strict thread matches above, loose matches on Subject: below --
2019-03-08  2:07 Yongseok Koh

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