[dpdk-dev] [PATCH] net/mlx5: remove excessive data prefetch

Adrien Mazarguil adrien.mazarguil at 6wind.com
Tue Mar 13 13:44:59 CET 2018


On Mon, Mar 12, 2018 at 10:05:45AM -0700, Yongseok Koh wrote:
> In Enhanced Multi-Packet Send (eMPW), entire packet data is prefetched to
> LLC if it isn't inlined. Even though this helps reducing jitter when HW
> fetches data by DMA, this can thresh the LLC with evicting precious data.
> And if the size of queue is large and there are many queues, this might not
> be effective. Also, if application runs on a remote node from the PCIe
> link, it may not be helpful and can even cause bad results.
> 
> Signed-off-by: Yongseok Koh <yskoh at mellanox.com>

Acked-by: Adrien Mazarguil <adrien.mazarguil at 6wind.com>

-- 
Adrien Mazarguil
6WIND


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