From: "Lukáš Šišmiš" <sismis@cesnet.cz>
To: "Morten Brørup" <mb@smartsharesystems.com>,
anatoly.burakov@intel.com, ian.stokes@intel.com
Cc: dev@dpdk.org
Subject: Re: [PATCH] net: increase the maximum of RX/TX descriptors
Date: Wed, 30 Oct 2024 14:58:40 +0100 [thread overview]
Message-ID: <b62a69ae-59dc-43c5-8e94-36c21d83e37f@cesnet.cz> (raw)
In-Reply-To: <98CBD80474FA8B44BF855DF32C47DC35E9F845@smartserver.smartshare.dk>
On 29. 10. 24 15:37, Morten Brørup wrote:
>> From: Lukas Sismis [mailto:sismis@cesnet.cz]
>> Sent: Tuesday, 29 October 2024 13.49
>>
>> Intel PMDs are capped by default to only 4096 RX/TX descriptors.
>> This can be limiting for applications requiring a bigger buffer
>> capabilities. The cap prevented the applications to configure
>> more descriptors. By bufferring more packets with RX/TX
>> descriptors, the applications can better handle the processing
>> peaks.
>>
>> Signed-off-by: Lukas Sismis <sismis@cesnet.cz>
>> ---
> Seems like a good idea.
>
> Have the max number of descriptors been checked with the datasheets for all the affected NIC chips?
>
I was hoping to get some feedback on this from the Intel folks.
But it seems like I can change it only for ixgbe (82599) to 32k
(possibly to 64k - 8), others - ice (E810) and i40e (X710) are capped at
8k - 32.
I neither have any experience with other drivers nor I have them
available to test so I will let it be in the follow-up version of this
patch.
Lukas
next prev parent reply other threads:[~2024-10-30 13:58 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-29 12:48 Lukas Sismis
2024-10-29 14:37 ` Morten Brørup
2024-10-30 13:58 ` Lukáš Šišmiš [this message]
2024-10-30 15:20 ` Stephen Hemminger
2024-10-30 15:40 ` Lukáš Šišmiš
2024-10-30 15:58 ` Bruce Richardson
2024-10-30 16:06 ` Stephen Hemminger
2024-10-30 15:06 ` [PATCH v2 1/2] net/ixgbe: " Lukas Sismis
2024-10-30 15:06 ` [PATCH v2 2/2] net/ice: " Lukas Sismis
2024-10-30 15:42 ` [PATCH v3 1/1] net/bonding: make bonding functions stable Lukas Sismis
2024-10-30 15:42 ` [PATCH v3 1/2] net/ixgbe: increase the maximum of RX/TX descriptors Lukas Sismis
2024-10-30 16:26 ` Morten Brørup
2024-10-30 15:42 ` [PATCH v3 2/2] net/ice: " Lukas Sismis
2024-10-30 16:26 ` Morten Brørup
-- strict thread matches above, loose matches on Subject: below --
2024-10-29 12:46 [PATCH] net: " Lukas Sismis
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