Thread (3 messages) flat view 3 messages, 3 authors, 2021-11-24

Re: [PATCH net-next v2] net: stmmac: Caclucate CDC error only once

From: patchwork-bot+netdevbpf@kernel.org
Date: 2021-11-24 04:21:53
Also in: linux-arm-kernel

Hello:

This patch was applied to netdev/net-next.git (master)
by Jakub Kicinski [off-list ref]:

On Mon, 22 Nov 2021 12:19:31 +0100 you wrote:
The clock domain crossing error (CDC) is calculated at every fetch of Tx or Rx
timestamps. It includes a division. Especially on arm32 based systems it is
expensive. It also requires two conditionals in the hotpath.

Add a compensation value cache to struct plat_stmmacenet_data and subtract it
unconditionally in the RX/TX functions which spares the conditionals.

[...]
Here is the summary with links:
  - [net-next,v2] net: stmmac: Caclucate CDC error only once
    https://git.kernel.org/netdev/net-next/c/c6d5f1933085

You are awesome, thank you!
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