netdev - Re: [PATCH net-next v10 4/7] net: tn40xx: add basic Tx handling

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Message-Id: <20240616.214622.1129224628661848031.fujita.tomonori@gmail.com>
Date: Sun, 16 Jun 2024 21:46:22 +0900 (JST)
From: FUJITA Tomonori <fujita.tomonori@...il.com>
To: andrew@...n.ch
Cc: hfdevel@....net, fujita.tomonori@...il.com, kuba@...nel.org,
 netdev@...r.kernel.org, horms@...nel.org, jiri@...nulli.us,
 pabeni@...hat.com, linux@...linux.org.uk, naveenm@...vell.com,
 jdamato@...tly.com
Subject: Re: [PATCH net-next v10 4/7] net: tn40xx: add basic Tx handling

On Sat, 15 Jun 2024 20:33:04 +0200
Andrew Lunn <andrew@...n.ch> wrote:

> I did wounder if calculating the value as needed would be any
> slower/faster than doing a table access. Doing arithmetic is very
> cheap compared to a cache miss for a table lookup. Something which
> could be bench marked and optimised later.

Indeed, that might be faster. I'll drop the table in the next
version. I'll put that experiment on my to-do list.