From: Stephen Hemminger <stephen@networkplumber.org>
To: kys@microsoft.com, haiyangz@microsoft.com, davem@davemloft.net
Cc: netdev@vger.kernel.org,
Stephen Hemminger <sthemmin@microsoft.com>,
devel@linuxdriverproject.org
Subject: [PATCH net] netvsc: increase default receive buffer size
Date: Thu, 14 Sep 2017 09:31:07 -0700 [thread overview]
Message-ID: <20170914163107.8404-1-sthemmin@microsoft.com> (raw)
The default receive buffer size was reduced by recent change
to a value which was appropriate for 10G and Windows Server 2016.
But the value is too small for full performance with 40G on Azure.
Increase the default back to maximum supported by host.
Fixes: 8b5327975ae1 ("netvsc: allow controlling send/recv buffer size")
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
---
drivers/net/hyperv/netvsc_drv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index c538a4f15f3b..d4902ee5f260 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -49,7 +49,7 @@
#define NETVSC_MIN_TX_SECTIONS 10
#define NETVSC_DEFAULT_TX 192 /* ~1M */
#define NETVSC_MIN_RX_SECTIONS 10 /* ~64K */
-#define NETVSC_DEFAULT_RX 2048 /* ~4M */
+#define NETVSC_DEFAULT_RX 10485 /* Max ~16M */
#define LINKCHANGE_INT (2 * HZ)
#define VF_TAKEOVER_INT (HZ / 10)
--
2.11.0
next reply other threads:[~2017-09-14 16:31 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-14 16:31 Stephen Hemminger [this message]
2017-09-14 17:02 ` [PATCH net] netvsc: increase default receive buffer size David Miller
2017-09-14 17:49 ` Stephen Hemminger
2017-09-15 21:48 ` David Miller
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