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

[De Lara Guarch, Pablo]

> -----Original Message-----
> From: Xu, Qian Q
> Sent: Friday, July 24, 2015 2:09 AM
> To: De Lara Guarch, Pablo; Qiu, Michael; dev at dpdk.org
> Subject: RE: [dpdk-dev] [PATCH] examples/l3fwd: increase lookup burst size
> to 8
> 
> And this patch will be only related to exact match, the common usage of lpm
> is not impacted.

That is right, thanks for pointing it out, Qian!

Pablo

> 
> 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>