From: "Morten Brørup" <mb@smartsharesystems.com>
To: "Lukas Sismis" <sismis@cesnet.cz>, <dev@dpdk.org>
Cc: <stephen@networkplumber.org>, <anatoly.burakov@intel.com>,
<ian.stokes@intel.com>,
"Bruce Richardson" <bruce.richardson@intel.com>
Subject: RE: [PATCH v3 1/2] net/ixgbe: increase the maximum of RX/TX descriptors
Date: Wed, 30 Oct 2024 17:26:12 +0100 [thread overview]
Message-ID: <98CBD80474FA8B44BF855DF32C47DC35E9F854@smartserver.smartshare.dk> (raw)
In-Reply-To: <20241030154256.379249-2-sismis@cesnet.cz>
> From: Lukas Sismis [mailto:sismis@cesnet.cz]
> Sent: Wednesday, 30 October 2024 16.43
>
> Intel PMDs are capped by default to only 4096 RX/TX descriptors.
> This can be limiting for applications requiring a bigger buffer
> capabilities. By bufferring more packets with RX/TX
> descriptors, the applications can better handle the processing
> peaks.
>
> Setting ixgbe max descriptors to 8192 as per datasheet:
> Register name: RDLEN
> Description: Descriptor Ring Length.
> This register sets the number of bytes
> allocated for descriptors in the circular descriptor buffer.
> It must be 128B aligned (7 LS bit must be set to zero).
> ** Note: validated Lengths up to 128K (8K descriptors). **
>
> Signed-off-by: Lukas Sismis <sismis@cesnet.cz>
> ---
Drivers should reflect hardware capabilities; it's not up to the driver to impose artificial limits on applications. Thank you for fixing this, Lukas.
Acked-by: Morten Brørup <mb@smartsharesystems.com>
next prev parent reply other threads:[~2024-10-30 16:26 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-29 12:48 [PATCH] net: " Lukas Sismis
2024-10-29 14:37 ` Morten Brørup
2024-10-30 13:58 ` Lukáš Šišmiš
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 [this message]
2024-10-30 15:42 ` [PATCH v3 2/2] net/ice: " Lukas Sismis
2024-10-30 16:26 ` Morten Brørup
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