Re: [PATCH net-next v2] net: avoid indirect calls in L4 checksum calculation

[David Miller]

From: Matteo Croce <mcroce@xxxxxxxxxx>
Date: Wed, 29 May 2019 17:13:48 +0200

> Commit 283c16a2dfd3 ("indirect call wrappers: helpers to speed-up
> indirect calls of builtin") introduces some macros to avoid doing
> indirect calls.
> 
> Use these helpers to remove two indirect calls in the L4 checksum
> calculation for devices which don't have hardware support for it.
> 
> As a test I generate packets with pktgen out to a dummy interface
> with HW checksumming disabled, to have the checksum calculated in
> every sent packet.
> The packet rate measured with an i7-6700K CPU and a single pktgen
> thread raised from 6143 to 6608 Kpps, an increase by 7.5%
> 
> Suggested-by: Davide Caratti <dcaratti@xxxxxxxxxx>
> Signed-off-by: Matteo Croce <mcroce@xxxxxxxxxx>

Applied.