[Intel-wired-lan] [PATCH v1] igc: Add scatter gather support

[Neftin, Sasha]

On 10/30/2019 11:43, Paul Menzel wrote:
> Dear Sasha,
> 
> 
> On 30.10.19 10:08, Sasha Neftin wrote:
>> Scatter gather is used to do DMA data transfers of data that is 
>> written to
>> noncontiguous areas of memory.
>> This patch enable scatter gather support.
> 
> enable*s*
> 
Thanks Paul - I will fix it and submit v2.
> Do you have numbers, if and how this improves performance?
> 
Yes, I've checked on two machines with i225 HW. For example, I've 
observed as follow at 2.5Gbps link speed:
sg	on 	off
tcp	2352.93	2342.19 slightly improved
udp	2403.97	2403.49 almost no impact
Generally, I see the TCP stream more affected.
But you could observe different behavior on different machines.
> How can this be tested?
> 
> […]
I used netperf on my machines.
> 
> 
> Kind regards,
> 
> Paul