From: Bruce Richardson <bruce.richardson@intel.com>
To: Yasuhiro Ohara <yasu@nttv6.jp>
Cc: dev@dpdk.org, Beilei Xing <beilei.xing@intel.com>
Subject: Re: ETH_RSS_IP only does not seem to balance traffic
Date: Thu, 13 Jan 2022 15:05:53 +0000 [thread overview]
Message-ID: <YeA/0SQjcKJpCBu9@bricha3-MOBL.ger.corp.intel.com> (raw)
In-Reply-To: <20220113.005204.1354235040127303916.yasu@nttv6.jp>
On Thu, Jan 13, 2022 at 12:52:04AM +0900, Yasuhiro Ohara wrote:
>
> Hi,
>
> My system developper friend recently ran into a problem where
> l3fwd does not appear to receive balanced traffic on Intel XL710,
> but it is resolved when the attached patch is applied.
>
> - .rss_hf = ETH_RSS_IP,
> + .rss_hf = ETH_RSS_IP | ETH_RSS_TCP | ETH_RSS_UDP,
>
> IIRC I ran into a similar problem 3 or 4 years back,
> but didn't report then because I believed I was doing something silly.
> But since my friend is an experienced engineer, I feel like
> it may be better (for the community) to ask this in the list.
>
> We are using dpdk-stable-18.11.6 and igb_uio.
>
> What are we doing wrong?
>
> If it is not a FAQ, I can test it again with more recent stable,
> and will report the details.
>
For XL710 NICs, I believe that ETH_RSS_IP load balances only IP frames that
do not have TCP or UDP headers also. Adding i40e driver maintainer on CC
to comment further.
/Bruce
next prev parent reply other threads:[~2022-01-13 15:06 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-12 15:52 Yasuhiro Ohara
2022-01-13 15:05 ` Bruce Richardson [this message]
2022-01-14 1:41 ` Yasuhiro Ohara
2022-01-14 1:44 ` Xing, Beilei
2022-01-14 1:55 ` Yasuhiro Ohara
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