From: Dariusz Sosnowski <dsosnowski@nvidia.com>
To: Ori Kam <orika@nvidia.com>,
"cristian.dumitrescu@intel.com" <cristian.dumitrescu@intel.com>,
Aman Singh <aman.deep.singh@intel.com>,
Yuying Zhang <yuying.zhang@intel.com>,
"NBU-Contact-Thomas Monjalon (EXTERNAL)" <thomas@monjalon.net>,
Ferruh Yigit <ferruh.yigit@amd.com>,
Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Cc: "dev@dpdk.org" <dev@dpdk.org>, Raslan Darawsheh <rasland@nvidia.com>
Subject: RE: [PATCH] ethdev: add calculate hash function
Date: Mon, 9 Oct 2023 08:15:12 +0000 [thread overview]
Message-ID: <IA1PR12MB8311EE6567AEE0440D0F1EA2A4CEA@IA1PR12MB8311.namprd12.prod.outlook.com> (raw)
In-Reply-To: <20230926113753.28765-1-orika@nvidia.com>
Hi,
> -----Original Message-----
> From: Ori Kam <orika@nvidia.com>
> Sent: Tuesday, September 26, 2023 13:38
> To: cristian.dumitrescu@intel.com; Aman Singh
> <aman.deep.singh@intel.com>; Yuying Zhang <yuying.zhang@intel.com>;
> NBU-Contact-Thomas Monjalon (EXTERNAL) <thomas@monjalon.net>;
> Ferruh Yigit <ferruh.yigit@amd.com>; Andrew Rybchenko
> <andrew.rybchenko@oktetlabs.ru>
> Cc: dev@dpdk.org; Ori Kam <orika@nvidia.com>; Raslan Darawsheh
> <rasland@nvidia.com>
> Subject: [PATCH] ethdev: add calculate hash function
>
> External email: Use caution opening links or attachments
>
>
> rte_flow supports insert by index table[1].
>
> Using the above table, the application can create rules that are based on hash.
> For example application can create the following logic in order to create load
> balancing:
> 1. Create insert by index table with 2 rules, that hashes based on dmac 2.
> Insert to index 0 a rule that sends the traffic to port A.
> 3. Insert to index 1 a rule that sends the traffic to port B.
>
> Let's also assume that before this table, there is a 5 tuple match table that
> jumps to the above table.
>
> So each packet that matches one of the 5 tuple rules is RSSed to port A or B,
> based on dmac hash.
>
> The issue arises when there is a miss on the 5 tuple table, which resulted due
> to the packet being the first packet of this flow, or fragmented packet or any
> other reason.
> In this case, the application must calculate what would be the hash calculated
> by the HW so it can send the packet to the correct port.
>
> This new API allows applications to calculate the hash value of a given packet
> for a given table.
>
> [1] -
> http://patches.dpdk.org/project/dpdk/patch/20230208030624.78465-2-
> akozyrev@nvidia.com/
>
> Signed-off-by: Ori Kam <orika@nvidia.com>
Acked-by: Dariusz Sosnowski <dsosnowski@nvidia.com>
Thanks,
Dariusz Sosnowski
next prev parent reply other threads:[~2023-10-09 8:15 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-26 11:37 Ori Kam
2023-10-09 8:15 ` Dariusz Sosnowski [this message]
2023-10-10 11:05 ` Ferruh Yigit
2023-10-10 11:42 ` Ori Kam
2023-10-11 2:11 ` fengchengwen
2023-10-11 8:34 ` Ferruh Yigit
2023-10-10 14:24 ` [PATCH v2] " Ori Kam
2023-10-11 16:08 ` Ferruh Yigit
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