From: Mingjin Ye <mingjinx.ye@intel.com>
To: dev@dpdk.org
Cc: Mingjin Ye <mingjinx.ye@intel.com>,
stable@dpdk.org, Anatoly Burakov <anatoly.burakov@intel.com>,
Vladimir Medvedkin <vladimir.medvedkin@intel.com>
Subject: [PATCH] net/ixgbe: fix min Rx/Tx descriptors
Date: Fri, 21 Feb 2025 08:23:18 +0000 [thread overview]
Message-ID: <20250221082318.331815-1-mingjinx.ye@intel.com> (raw)
The minimum free packet threshold (tx_free_thresh) and the minimum RS bit
threshold (tx_rs_thresh) both have a default value of 32. Therefore, the
default minimum number of ring descriptors value is 64.
Fixes: dee5f1fd5fc7 ("ixgbe: get queue info and descriptor limits")
Cc: stable@dpdk.org
Signed-off-by: Mingjin Ye <mingjinx.ye@intel.com>
---
doc/guides/nics/ixgbe.rst | 2 +-
drivers/net/intel/ixgbe/ixgbe_rxtx.h | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/doc/guides/nics/ixgbe.rst b/doc/guides/nics/ixgbe.rst
index c5c6a6c34b..10a0cdd270 100644
--- a/doc/guides/nics/ixgbe.rst
+++ b/doc/guides/nics/ixgbe.rst
@@ -76,7 +76,7 @@ Scattered packets are not supported in this mode.
If an incoming packet is greater than the maximum acceptable length of one "mbuf" data size (by default, the size is 2 KB),
vPMD for RX would be disabled.
-By default, IXGBE_MAX_RING_DESC is set to 8192 and RTE_PMD_IXGBE_RX_MAX_BURST is set to 32.
+By default, IXGBE_MAX_RING_DESC is set to 8192 and RTE_PMD_IXGBE_RX_MAX_BURST is set to 64.
Windows Prerequisites and Pre-conditions
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/drivers/net/intel/ixgbe/ixgbe_rxtx.h b/drivers/net/intel/ixgbe/ixgbe_rxtx.h
index 278f665108..54569c7ade 100644
--- a/drivers/net/intel/ixgbe/ixgbe_rxtx.h
+++ b/drivers/net/intel/ixgbe/ixgbe_rxtx.h
@@ -26,7 +26,7 @@
* descriptors should meet the following condition:
* (num_ring_desc * sizeof(rx/tx descriptor)) % 128 == 0
*/
-#define IXGBE_MIN_RING_DESC 32
+#define IXGBE_MIN_RING_DESC 64
#define IXGBE_MAX_RING_DESC 8192
#define RTE_PMD_IXGBE_TX_MAX_BURST 32
--
2.25.1
next reply other threads:[~2025-02-21 8:54 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-21 8:23 Mingjin Ye [this message]
2025-02-21 14:33 ` Bruce Richardson
2025-02-21 14:36 ` Bruce Richardson
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