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From: "Xu, Qian Q" <qian.q.xu@intel.com>
To: "De Lara Guarch, Pablo" <pablo.de.lara.guarch@intel.com>, "Qiu, Michael"
 <michael.qiu@intel.com>, "dev@dpdk.org" <dev@dpdk.org>
Thread-Topic: [dpdk-dev] [PATCH] examples/l3fwd: increase lookup burst size
 to 8
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Date: Fri, 24 Jul 2015 01:08:36 +0000
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Subject: Re: [dpdk-dev] [PATCH] examples/l3fwd: increase lookup burst size
 to 8
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And this patch will be only related to exact match, the common usage of lpm=
 is not impacted.=20

Thanks
Qian

-----Original Message-----
From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of De Lara Guarch, Pablo
Sent: Friday, July 24, 2015 8:29 AM
To: Qiu, Michael; dev@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@dpdk.org
> Subject: RE: [dpdk-dev] [PATCH] examples/l3fwd: increase lookup burst=20
> size to 8
>=20
> Hi, Pablo
>=20
> Is there any performance data for this change?

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

Thanks,
Pablo

>=20
> Thanks,
> Michael
>=20
> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Pablo de Lara
> Sent: Thursday, July 23, 2015 9:12 AM
> To: dev@dpdk.org
> Subject: [dpdk-dev] [PATCH] examples/l3fwd: increase lookup burst size=20
> to 8
>=20
> With the new hash implementation, the minimum lookup burst size to get=20
> good performance is 8, since its internal pipeline consists of 4=20
> stages of 2 entries each, so to avoid duplication, burst size should be 8=
 or more entries.
>=20
> Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>