Re: [dpdk-dev] [PATCH v1] examples/l3fwd: enable hash multi lookup for ARM

[Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>]

Thanks Ruifeng for the patch. I have one question inline.

Jerin/Hemant,
	It would be good if you could test this on your platforms, since this is being made default.

Thanks,
Honnappa

> -----Original Message-----
> From: Ruifeng Wang <ruifeng.wang@arm.com>
> Sent: Tuesday, January 1, 2019 11:28 PM
> To: dev@dpdk.org
> Cc: thomas@monjalon.net; jerinj@marvell.com; hemant.agrawal@nxp.com;
> bruce.richardson@intel.com; chaozhu@linux.vnet.ibm.com; Honnappa
> Nagarahalli <Honnappa.Nagarahalli@arm.com>; nd <nd@arm.com>; Ruifeng
> Wang (Arm Technology China) <Ruifeng.Wang@arm.com>;
> tomaszx.kulasek@intel.com
> Subject: [PATCH v1] examples/l3fwd: enable hash multi lookup for ARM
> 
> Compile option for hash_multi_lookup was broken, and caused feature cannot
> be enabled on Arm.
> This patch sets hash_multi_lookup method as default, and sequential lookup
> becomes optional.
> 
> In test of 8192 flows with 128-byte packets, throughput increased by 25.6%
> after enabling hash_multi_lookup.
> 
I assume these are lookup-hit numbers. Do you have look-up miss numbers?

> Fixes: 52c97adc1f0f ("examples/l3fwd: fix exact match performance")
> Cc: tomaszx.kulasek@intel.com
> 
> Signed-off-by: Ruifeng Wang <ruifeng.wang@arm.com>
> Reviewed-by: Gavin Hu <gavin.hu@arm.com>
> Reviewed-by: Phil Yang <phil.yang@arm.com>
> Tested-by: Ruifeng Wang <ruifeng.wang@arm.com>
> ---
>  examples/l3fwd/l3fwd.h | 4 ----
>  1 file changed, 4 deletions(-)
> 
> diff --git a/examples/l3fwd/l3fwd.h b/examples/l3fwd/l3fwd.h index
> c962deac3..063b80018 100644
> --- a/examples/l3fwd/l3fwd.h
> +++ b/examples/l3fwd/l3fwd.h
> @@ -11,10 +11,6 @@
> 
>  #define RTE_LOGTYPE_L3FWD RTE_LOGTYPE_USER1
> 
> -#if !defined(NO_HASH_MULTI_LOOKUP) &&
> defined(RTE_MACHINE_CPUFLAG_NEON) -#define
> NO_HASH_MULTI_LOOKUP 1 -#endif
> -
>  #define MAX_PKT_BURST     32
>  #define BURST_TX_DRAIN_US 100 /* TX drain every ~100us */
> 
> --
> 2.17.1