From e26a0c5d828b225b88f534e2fcf10bf617f85f23 Mon Sep 17 00:00:00 2001 From: Shradha Gupta Date: Sun, 29 Sep 2024 20:44:35 -0700 Subject: [PATCH] net: mana: Increase the DEF_RX_BUFFERS_PER_QUEUE to 1024 Through some experiments, we found out that increasing the default RX buffers count from 512 to 1024, gives slightly better throughput and significantly reduces the no_wqe_rx errs on the receiver side. Along with these, other parameters like cpu usage, retrans seg etc also show some improvement with 1024 value. Following are some snippets from the experiments ntttcp tests with 512 Rx buffers --------------------------------------- connections| throughput| no_wqe errs| --------------------------------------- 1 | 40.93Gbps | 123,211 | 16 | 180.15Gbps | 190,120 | 128 | 180.20Gbps | 173,508 | 256 | 180.27Gbps | 189,884 | ntttcp tests with 1024 Rx buffers --------------------------------------- connections| throughput| no_wqe errs| --------------------------------------- 1 | 44.22Gbps | 19,864 | 16 | 180.19Gbps | 4,430 | 128 | 180.21Gbps | 2,560 | 256 | 180.29Gbps | 1,529 | So, increasing the default RX buffers per queue count to 1024 Signed-off-by: Shradha Gupta Reviewed-by: Haiyang Zhang Reviewed-by: Pavan Chebbi Link: https://patch.msgid.link/1727667875-29908-1-git-send-email-shradhagupta@linux.microsoft.com Signed-off-by: Paolo Abeni --- include/net/mana/mana.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/net/mana/mana.h b/include/net/mana/mana.h index f2a5200d8a0f..9b0faa24b758 100644 --- a/include/net/mana/mana.h +++ b/include/net/mana/mana.h @@ -43,7 +43,7 @@ enum TRI_STATE { * size beyond this value gets rejected by __alloc_page() call. */ #define MAX_RX_BUFFERS_PER_QUEUE 8192 -#define DEF_RX_BUFFERS_PER_QUEUE 512 +#define DEF_RX_BUFFERS_PER_QUEUE 1024 #define MIN_RX_BUFFERS_PER_QUEUE 128 /* This max value for TX buffers is derived as the maximum allocatable