From: Simon Horman <simon.horman@corigine.com>
To: Ziwei Xiao <ziweixiao@google.com>
Cc: netdev@vger.kernel.org, davem@davemloft.net, kuba@kernel.org,
Coco Li <lixiaoyan@google.com>
Subject: Re: [PATCH net-next] gve: Support IPv6 Big TCP on DQ
Date: Tue, 23 May 2023 12:21:06 +0200 [thread overview]
Message-ID: <ZGyTkjrvCIQozPUj@corigine.com> (raw)
In-Reply-To: <20230522201552.3585421-1-ziweixiao@google.com>
On Mon, May 22, 2023 at 01:15:52PM -0700, Ziwei Xiao wrote:
> From: Coco Li <lixiaoyan@google.com>
>
> Add support for using IPv6 Big TCP on DQ which can handle large TSO/GRO
> packets. See https://lwn.net/Articles/895398/. This can improve the
> throughput and CPU usage.
>
> Perf test result:
> ip -d link show $DEV
> gso_max_size 185000 gso_max_segs 65535 tso_max_size 262143 tso_max_segs 65535 gro_max_size 185000
>
> For performance, tested with neper using 9k MTU on hardware that supports 200Gb/s line rate.
>
> In single streams when line rate is not saturated, we expect throughput improvements.
> When the networking is performing at line rate, we expect cpu usage improvements.
>
> Tcp_stream (unidirectional stream test, T=thread, F=flow):
> skb=180kb, T=1, F=1, no zerocopy: throughput average=64576.88 Mb/s, sender stime=8.3, receiver stime=10.68
> skb=64kb, T=1, F=1, no zerocopy: throughput average=64862.54 Mb/s, sender stime=9.96, receiver stime=12.67
> skb=180kb, T=1, F=1, yes zerocopy: throughput average=146604.97 Mb/s, sender stime=10.61, receiver stime=5.52
> skb=64kb, T=1, F=1, yes zerocopy: throughput average=131357.78 Mb/s, sender stime=12.11, receiver stime=12.25
>
> skb=180kb, T=20, F=100, no zerocopy: throughput average=182411.37 Mb/s, sender stime=41.62, receiver stime=79.4
> skb=64kb, T=20, F=100, no zerocopy: throughput average=182892.02 Mb/s, sender stime=57.39, receiver stime=72.69
> skb=180kb, T=20, F=100, yes zerocopy: throughput average=182337.65 Mb/s, sender stime=27.94, receiver stime=39.7
> skb=64kb, T=20, F=100, yes zerocopy: throughput average=182144.20 Mb/s, sender stime=47.06, receiver stime=39.01
>
> Signed-off-by: Ziwei Xiao <ziweixiao@google.com>
> Signed-off-by: Coco Li <lixiaoyan@google.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
next prev parent reply other threads:[~2023-05-23 10:22 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-22 20:15 [PATCH net-next] gve: Support IPv6 Big TCP on DQ Ziwei Xiao
2023-05-23 10:21 ` Simon Horman [this message]
2023-05-24 4:20 ` patchwork-bot+netdevbpf
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