From: Igor Gutorov <igootorov@gmail.com>
To: Yuying.Zhang@intel.com
Cc: dev@dpdk.org, Igor Gutorov <igootorov@gmail.com>
Subject: [PATCH] net/i40e: increase descriptor queue length to 8160
Date: Mon, 27 May 2024 19:19:21 +0300 [thread overview]
Message-ID: <20240527161921.183866-1-igootorov@gmail.com> (raw)
According to the Intel X710/XXV710/XL710 Datasheet, the maximum receive
queue descriptor length is 0x1FE0 (8160 in base 10). This is specified
as QLEN in table 8-12, page 1083.
I've tested this change with an XXV710 NIC and it has positive effect on
performance under high load scenarios. Where previously I'd get
~2000 packets/sec miss rate, now I get only ~40 packets/sec miss rate.
Signed-off-by: Igor Gutorov <igootorov@gmail.com>
---
drivers/net/i40e/i40e_rxtx.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/i40e/i40e_rxtx.h b/drivers/net/i40e/i40e_rxtx.h
index 2f2f890855..33fc9770d9 100644
--- a/drivers/net/i40e/i40e_rxtx.h
+++ b/drivers/net/i40e/i40e_rxtx.h
@@ -25,7 +25,7 @@
#define I40E_RX_MAX_DATA_BUF_SIZE (16 * 1024 - 128)
#define I40E_MIN_RING_DESC 64
-#define I40E_MAX_RING_DESC 4096
+#define I40E_MAX_RING_DESC 8160
#define I40E_FDIR_NUM_TX_DESC (I40E_FDIR_PRG_PKT_CNT << 1)
#define I40E_FDIR_NUM_RX_DESC (I40E_FDIR_PRG_PKT_CNT << 1)
--
2.45.1
next reply other threads:[~2024-05-27 16:20 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-27 16:19 Igor Gutorov [this message]
2024-06-03 10:41 ` Igor Gutorov
2024-06-05 10:47 ` Igor Gutorov
2024-06-06 9:18 ` Morten Brørup
2024-06-18 12:12 ` Bruce Richardson
2024-06-28 12:28 ` Bruce Richardson
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