netdev - Re: [PATCH net-next] udp: handle gro

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Message-ID: <1513608330.8795.7.camel@redhat.com>
Date:   Mon, 18 Dec 2017 15:45:30 +0100
From:   Paolo Abeni <pabeni@...hat.com>
To:     zhangliping <zhanglkk1990@....com>
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        zhangliping <zhangliping02@...du.com>
Subject: Re: [PATCH net-next] udp: handle gro_receive only when necessary

On Mon, 2017-12-18 at 20:09 +0800, zhangliping wrote:
> My test case is very simple, two VMs were connected via ovs + dpdk.
> Inside VM, rps is enabled. Then one VM runs "iperf -s -u &", another
> VM runs "iperf -c 1.1.1.2 -P 12 -u -b 10Gbps -l 40 -t 36000".

Understood, thanks. Still the time spent in 'udp4_lib_lookup2' looks
quite different/higher than what I observe in my tests. Are you using
x86_64? if not, do you see many cache misses in udp4_lib_lookup2?

Thanks,

Paolo