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From: Stephen Hemminger <stephen@networkplumber.org>
To: chunmei Liu <chunmei.liu@intel.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] fix ceph async messenger runtime bug based on spdk/dpdk
Date: Wed, 13 Dec 2017 13:31:00 -0800	[thread overview]
Message-ID: <20171213133100.530518bd@xeon-e3> (raw)
In-Reply-To: <1513193552-159561-1-git-send-email-chunmei.liu@intel.com>

On Wed, 13 Dec 2017 11:32:32 -0800
chunmei Liu <chunmei.liu@intel.com> wrote:

> diff --git a/drivers/net/ixgbe/ixgbe_rxtx.c b/drivers/net/ixgbe/ixgbe_rxtx.c
> index 1e07895..30fdbc1 100644
> --- a/drivers/net/ixgbe/ixgbe_rxtx.c
> +++ b/drivers/net/ixgbe/ixgbe_rxtx.c
> @@ -1589,6 +1589,7 @@ ixgbe_rx_alloc_bufs(struct ixgbe_rx_queue *rxq, bool reset_mbuf)
>  		}
>  
>  		rte_mbuf_refcnt_set(mb, 1);
> +		mb->next = NULL;
>  		mb->data_off = RTE_PKTMBUF_HEADROOM;
>  

This will have measurable performance impact because the next pointer is
on the second cache line.

  parent reply	other threads:[~2017-12-13 21:31 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-12-13 19:32 chunmei Liu
2017-12-13 21:18 ` Thomas Monjalon
2017-12-13 21:31 ` Stephen Hemminger [this message]
2017-12-13 22:34   ` Liu, Chunmei
2017-12-13 22:46   ` Liu, Chunmei
2017-12-13 22:51     ` Stephen Hemminger
  -- strict thread matches above, loose matches on Subject: below --
2017-12-13 23:44 chunmei Liu
2017-12-14  7:47 ` Thomas Monjalon
2017-12-14  9:24 ` Olivier MATZ
2017-12-14 11:54 ` Ananyev, Konstantin
2017-12-13 23:40 chunmei Liu
2017-12-13 19:28 chunmei Liu

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