netdev - Re: [PATCH net-next 7/7] ibmvnic: Perform tx CSO during send scrq direct

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Message-ID: <20240802171531.101037f6@kernel.org>
Date: Fri, 2 Aug 2024 17:15:31 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Nick Child <nnac123@...ux.ibm.com>
Cc: netdev@...r.kernel.org, bjking1@...ux.ibm.com, haren@...ux.ibm.com,
 ricklind@...ibm.com
Subject: Re: [PATCH net-next 7/7] ibmvnic: Perform tx CSO during send scrq
 direct

On Thu,  1 Aug 2024 16:23:40 -0500 Nick Child wrote:
> This extra
> precaution (requesting header info when the backing device may not use
> it) comes at the cost of performance (using direct vs indirect hcalls
> has a 30% delta in small packet RR transaction rate). 

What's "small" in this case? Non-GSO, or also less than MTU?