netdev - Re: [PATCH V2 net-next] sfc: The size of the RX recycle ring should be more flexible

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Date:   Wed, 02 Feb 2022 05:10:10 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Martin Habets <habetsm.xilinx@...il.com>
Cc:     ihuguet@...hat.com, davem@...emloft.net, kuba@...nel.org,
        ecree.xilinx@...il.com, netdev@...r.kernel.org, dinang@...inx.com
Subject: Re: [PATCH V2 net-next] sfc: The size of the RX recycle ring should be
 more flexible

Hello:

This patch was applied to netdev/net-next.git (master)
by Jakub Kicinski <kuba@...nel.org>:

On Mon, 31 Jan 2022 11:10:54 +0000 you wrote:
> Ideally the size would depend on the link speed, but the recycle
> ring is created when the interface is brought up before the driver
> knows the link speed. So size it for the maximum speed of a given NIC.
> PowerPC is only supported on SFN7xxx and SFN8xxx NICs.
> 
> With this patch on a 40G NIC the number of calls to alloc_pages and
> friends went down from about 18% to under 2%.
> On a 10G NIC the number of calls to alloc_pages and friends went down
> from about 15% to 0 (perf did not capture any calls during the 60
> second test).
> On a 100G NIC the number of calls to alloc_pages and friends went down
> from about 23% to 4%.
> 
> [...]

Here is the summary with links:
  - [V2,net-next] sfc: The size of the RX recycle ring should be more flexible
    https://git.kernel.org/netdev/net-next/c/000fe940e51f

You are awesome, thank you!
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