From: Lukas Sismis <sismis@cesnet.cz>
To: dev@dpdk.org
Cc: stephen@networkplumber.org, mb@smartsharesystems.com,
anatoly.burakov@intel.com, ian.stokes@intel.com,
Lukas Sismis <sismis@cesnet.cz>
Subject: [PATCH v3 2/2] net/ice: increase the maximum of RX/TX descriptors
Date: Wed, 30 Oct 2024 16:42:56 +0100 [thread overview]
Message-ID: <20241030154256.379249-3-sismis@cesnet.cz> (raw)
In-Reply-To: <20241030154256.379249-1-sismis@cesnet.cz>
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 ice max descriptors to 8192 - 32 as per datasheet:
Register name: QLEN (Rx-Queue)
Description: Receive Queue Length
Defines the size of the descriptor queue in descriptors units
from eight descriptors (QLEN=0x8) up to 8K descriptors minus
32 (QLEN=0x1FE0).
QLEN Restrictions: When the PXE_MODE flag in the
GLLAN_RCTL_0 register is cleared, the QLEN must be whole
number of 32 descriptors. When the PXE_MODE flag is set, the
QLEN can be one of the following options:
Up to 4 PFs, QLEN can be set to: 8, 16, 24 or 32 descriptors.
Up to 8 PFs, QLEN can be set to: 8 or 16 descriptors
Signed-off-by: Lukas Sismis <sismis@cesnet.cz>
---
drivers/net/ice/ice_rxtx.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ice/ice_rxtx.h b/drivers/net/ice/ice_rxtx.h
index f7276cfc9f..45f25b3609 100644
--- a/drivers/net/ice/ice_rxtx.h
+++ b/drivers/net/ice/ice_rxtx.h
@@ -9,7 +9,7 @@
#define ICE_ALIGN_RING_DESC 32
#define ICE_MIN_RING_DESC 64
-#define ICE_MAX_RING_DESC 4096
+#define ICE_MAX_RING_DESC (8192 - 32)
#define ICE_DMA_MEM_ALIGN 4096
#define ICE_RING_BASE_ALIGN 128
--
2.34.1
next prev parent reply other threads:[~2024-10-30 15:43 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
2024-10-30 15:42 ` Lukas Sismis [this message]
2024-10-30 16:26 ` [PATCH v3 2/2] net/ice: " Morten Brørup
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