From: Ferruh Yigit <ferruh.yigit@amd.com>
To: Ori Kam <orika@nvidia.com>,
cristian.dumitrescu@intel.com,
Aman Singh <aman.deep.singh@intel.com>,
Yuying Zhang <yuying.zhang@intel.com>,
Thomas Monjalon <thomas@monjalon.net>,
Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Cc: dev@dpdk.org, rasland@nvidia.com
Subject: Re: [PATCH v2] ethdev: add calculate hash function
Date: Wed, 11 Oct 2023 17:08:36 +0100 [thread overview]
Message-ID: <e34970db-c972-4ad3-8d70-b931f5feca84@amd.com> (raw)
In-Reply-To: <20231010142401.27289-1-orika@nvidia.com>
On 10/10/2023 3:24 PM, Ori Kam wrote:
> 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>
>
Applied to dpdk-next-net/main, thanks.
prev parent reply other threads:[~2023-10-11 16:08 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-26 11:37 [PATCH] " Ori Kam
2023-10-09 8:15 ` Dariusz Sosnowski
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 [this message]
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