Re: [dpdk-dev] [PATCH] testpmd: modify the mac of csum forwarding

["Liu, Jijiang" <jijiang.liu@intel.com>]

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Michael Qiu
> Sent: Friday, August 07, 2015 11:29 AM
> To: dev@dpdk.org
> Subject: [dpdk-dev] [PATCH] testpmd: modify the mac of csum forwarding
> 
> For some ethnet-switch like intel RRC, all the packet forwarded out by DPDK
> will be dropped in switch side, so the packet generator will never receive the
> packet.
> 
> Signed-off-by: Michael Qiu <michael.qiu@intel.com>
> ---
>  app/test-pmd/csumonly.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/app/test-pmd/csumonly.c b/app/test-pmd/csumonly.c index
> 1bf3485..bf8af1d 100644
> --- a/app/test-pmd/csumonly.c
> +++ b/app/test-pmd/csumonly.c
> @@ -550,6 +550,10 @@ pkt_burst_checksum_forward(struct fwd_stream
> *fs)
>  		 * and inner headers */
> 
>  		eth_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
> +		ether_addr_copy(&peer_eth_addrs[fs->peer_addr],
> +				&eth_hdr->d_addr);
> +		ether_addr_copy(&ports[fs->tx_port].eth_addr,
> +				&eth_hdr->s_addr);
>  		parse_ethernet(eth_hdr, &info);
>  		l3_hdr = (char *)eth_hdr + info.l2_len;
> 
> --
> 1.9.3
The change will affect on the csum fwd performance.
But I also think the change is necessary, or we cannot use csumonly fwd mode in guest。

Acked-by: Jijiang Liu <Jijiang.liu@intel.com>