From patchwork Thu Jul 21 17:49:02 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steve Dickson X-Patchwork-Id: 996252 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.4) with ESMTP id p6LHn6NY031573 for ; Thu, 21 Jul 2011 17:49:06 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751678Ab1GURtF (ORCPT ); Thu, 21 Jul 2011 13:49:05 -0400 Received: from mx1.redhat.com ([209.132.183.28]:59284 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751419Ab1GURtF (ORCPT ); Thu, 21 Jul 2011 13:49:05 -0400 Received: from int-mx02.intmail.prod.int.phx2.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id p6LHn48P016265 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Thu, 21 Jul 2011 13:49:04 -0400 Received: from bighat.boston.devel.redhat.com (bighat.boston.devel.redhat.com [10.16.60.55]) by int-mx02.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id p6LHn3Xh025549 for ; Thu, 21 Jul 2011 13:49:04 -0400 From: Steve Dickson To: Linux NFS Mailing list Subject: [PATCH] RDMA: Increasing RPCRDMA_MAX_DATA_SEGS Date: Thu, 21 Jul 2011 13:49:02 -0400 Message-Id: <1311270542-2021-1-git-send-email-steved@redhat.com> X-Scanned-By: MIMEDefang 2.67 on 10.5.11.12 Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Thu, 21 Jul 2011 17:49:06 +0000 (UTC) Our performance team has noticed that increasing RPCRDMA_MAX_DATA_SEGS from 8 to 64 significantly increases throughput when using the RDMA transport. Signed-off-by: Steve Dickson --- net/sunrpc/xprtrdma/xprt_rdma.h | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h index cae761a..5d1cfe5 100644 --- a/net/sunrpc/xprtrdma/xprt_rdma.h +++ b/net/sunrpc/xprtrdma/xprt_rdma.h @@ -109,7 +109,7 @@ struct rpcrdma_ep { */ /* temporary static scatter/gather max */ -#define RPCRDMA_MAX_DATA_SEGS (8) /* max scatter/gather */ +#define RPCRDMA_MAX_DATA_SEGS (64) /* max scatter/gather */ #define RPCRDMA_MAX_SEGS (RPCRDMA_MAX_DATA_SEGS + 2) /* head+tail = 2 */ #define MAX_RPCRDMAHDR (\ /* max supported RPC/RDMA header */ \