From patchwork Wed Jun 10 09:08:24 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Allen Hubbe X-Patchwork-Id: 482691 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 140751402A0 for ; Thu, 11 Jun 2015 00:17:41 +1000 (AEST) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=emc.com header.i=@emc.com header.b=e7yI86bw; dkim-atps=neutral Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965075AbbFJONk (ORCPT ); Wed, 10 Jun 2015 10:13:40 -0400 Received: from mailuogwdur.emc.com ([128.221.224.79]:55965 "EHLO mailuogwdur.emc.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965297AbbFJOJM (ORCPT ); Wed, 10 Jun 2015 10:09:12 -0400 Received: from maildlpprd51.lss.emc.com (maildlpprd51.lss.emc.com [10.106.48.155]) by mailuogwprd54.lss.emc.com (Sentrion-MTA-4.3.1/Sentrion-MTA-4.3.0) with ESMTP id t5AE99Qu032242 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Wed, 10 Jun 2015 10:09:10 -0400 X-DKIM: OpenDKIM Filter v2.4.3 mailuogwprd54.lss.emc.com t5AE99Qu032242 DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d=emc.com; s=jan2013; t=1433945350; bh=WUw05UJRLJtVyYJef76UoYAErzY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: In-Reply-To:References; b=e7yI86bwZb2WHy94hsjYJEbr3X8e7HgxDg7BKPLoZ5WB9ACRMmg9YlKcE5H9wptpn E11GyJOJFG8o9Osoyh24MW6J/ihu83JAvPGf9HDBQd5bvnq9UZImdr7rKS2P5/DEau hJqMsEKARv1mJEtnE5vYqBcT061k7VJApWxcuqgk= X-DKIM: OpenDKIM Filter v2.4.3 mailuogwprd54.lss.emc.com t5AE99Qu032242 Received: from mailsyshubprd56.lss.emc.com (mailhub.lss.emc.com [10.106.48.138]) by maildlpprd51.lss.emc.com (RSA Interceptor); Wed, 10 Jun 2015 10:08:51 -0400 Received: from HY-R1012-SPA.usd.lab.emc.com.com (hy-r1012-spa.rtp.lab.emc.com [10.6.71.221]) by mailsyshubprd56.lss.emc.com (Sentrion-MTA-4.3.1/Sentrion-MTA-4.3.0) with ESMTP id t5AE8iKb021690; Wed, 10 Jun 2015 10:08:55 -0400 From: Allen Hubbe To: linux-ntb@googlegroups.com Cc: linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Jon Mason , Dave Jiang , Allen Hubbe Subject: [PATCH v4 19/19] NTB: Increase transport MTU to 64k from 16k Date: Wed, 10 Jun 2015 05:08:24 -0400 Message-Id: X-Mailer: git-send-email 2.4.0.rc0.44.g244209c.dirty In-Reply-To: References: In-Reply-To: References: X-RSA-Classifications: public X-Sentrion-Hostname: mailuogwprd54.lss.emc.com Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Dave Jiang 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 --- 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");