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From: Allen Hubbe <Allen.Hubbe@emc.com>
To: linux-ntb@googlegroups.com
Cc: linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
	Jon Mason <jdmason@kudzu.us>, Dave Jiang <dave.jiang@intel.com>,
	Allen Hubbe <Allen.Hubbe@emc.com>
Subject: [PATCH v4 19/19] NTB: Increase transport MTU to 64k from 16k
Date: Wed, 10 Jun 2015 05:08:24 -0400	[thread overview]
Message-ID: <b1facc7cc0e9f2a2a3e2c33ca694b75a5343c798.1433925092.git.Allen.Hubbe@emc.com> (raw)
In-Reply-To: <cover.1433925092.git.Allen.Hubbe@emc.com>
In-Reply-To: <cover.1433925092.git.Allen.Hubbe@emc.com>

From: Dave Jiang <dave.jiang@intel.com>

Benchmarking showed a significant performance increase with the MTU size
to 64k instead of 16k.  Change the driver default to 64k.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
 drivers/ntb/ntb_transport.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index e07b056af3be..1551493197b4 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -76,7 +76,7 @@ static unsigned long max_mw_size;
 module_param(max_mw_size, ulong, 0644);
 MODULE_PARM_DESC(max_mw_size, "Limit size of large memory windows");
 
-static unsigned int transport_mtu = 0x401E;
+static unsigned int transport_mtu = 0x10000;
 module_param(transport_mtu, uint, 0644);
 MODULE_PARM_DESC(transport_mtu, "Maximum size of NTB transport packets");
 
-- 
2.4.0.rc0.43.gcf8a8c6


      parent reply	other threads:[~2015-06-10 14:09 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-06-10  9:08 [PATCH v4 00/19] NTB: Add NTB hardware abstraction layer Allen Hubbe
2015-06-10  9:08 ` [PATCH v4 01/19] NTB: Move files in preparation for NTB abstraction Allen Hubbe
2015-06-10  9:08 ` [PATCH v4 02/19] NTB: Add NTB hardware abstraction layer Allen Hubbe
2015-06-10  9:08 ` [PATCH v4 03/19] NTB: Split ntb_hw_intel and ntb_transport drivers Allen Hubbe
2015-06-10  9:08 ` [PATCH v4 04/19] NTB: Read peer info from local SPAD in transport Allen Hubbe
2015-06-10  9:08 ` [PATCH v4 05/19] NTB: Enable link for Intel root port mode in probe Allen Hubbe
2015-06-10  9:08 ` [PATCH v4 06/19] NTB: Check the device ID to set errata flags Allen Hubbe
2015-06-10  9:08 ` [PATCH v4 07/19] NTB: Differentiate transport link down messages Allen Hubbe
2015-06-10  9:08 ` [PATCH v4 08/19] NTB: Do not advance transport RX on link down Allen Hubbe
2015-06-10  9:08 ` [PATCH v4 09/19] NTB: Reset transport QP link stats on down Allen Hubbe
2015-06-10  9:08 ` [PATCH v4 10/19] NTB: Add parameters for Intel SNB B2B addresses Allen Hubbe
2015-06-10  9:08 ` [PATCH v4 11/19] NTB: Add ping pong test client Allen Hubbe
2015-06-10  9:08 ` [PATCH v4 12/19] NTB: Add tool " Allen Hubbe
2015-06-10  9:08 ` [PATCH v4 13/19] NTB: Rate limit ntb_qp_link_work Allen Hubbe
2015-06-10  9:08 ` [PATCH v4 14/19] NTB: Use NUMA memory and DMA chan in transport Allen Hubbe
2015-06-10  9:08 ` [PATCH v4 15/19] NTB: Use NUMA memory in Intel driver Allen Hubbe
2015-06-10  9:08 ` [PATCH v4 16/19] NTB: Improve performance with write combining Allen Hubbe
2015-06-10  9:08 ` [PATCH v4 17/19] NTB: Default to CPU memcpy for performance Allen Hubbe
2015-06-10  9:08 ` [PATCH v4 18/19] NTB: Rename Intel code names to platform names Allen Hubbe
2015-06-10  9:08 ` Allen Hubbe [this message]

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