[dpdk-dev] [PATCH] examples/l3fwd: increase lookup burst size to 8

[Xu, Qian Q]

And this patch will be only related to exact match, the common usage of lpm is not impacted. 

Thanks
Qian

-----Original Message-----
From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of De Lara Guarch, Pablo
Sent: Friday, July 24, 2015 8:29 AM
To: Qiu, Michael; dev at dpdk.org
Subject: Re: [dpdk-dev] [PATCH] examples/l3fwd: increase lookup burst size to 8

Hi Michael,

> -----Original Message-----
> From: Qiu, Michael
> Sent: Thursday, July 23, 2015 6:26 PM
> To: De Lara Guarch, Pablo; dev at dpdk.org
> Subject: RE: [dpdk-dev] [PATCH] examples/l3fwd: increase lookup burst 
> size to 8
> 
> Hi, Pablo
> 
> Is there any performance data for this change?

With this change, performance increases around 12% compared to the version before the patch.

Thanks,
Pablo

> 
> Thanks,
> Michael
> 
> -----Original Message-----
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Pablo de Lara
> Sent: Thursday, July 23, 2015 9:12 AM
> To: dev at dpdk.org
> Subject: [dpdk-dev] [PATCH] examples/l3fwd: increase lookup burst size 
> to 8
> 
> With the new hash implementation, the minimum lookup burst size to get 
> good performance is 8, since its internal pipeline consists of 4 
> stages of 2 entries each, so to avoid duplication, burst size should be 8 or more entries.
> 
> Signed-off-by: Pablo de Lara <pablo.de.lara.guarch at intel.com>