From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: <shemming@Brocade.com> Received: from mx0a-000f0801.pphosted.com (mx0a-000f0801.pphosted.com [67.231.144.122]) by dpdk.org (Postfix) with ESMTP id 40714FFA for <dev@dpdk.org>; Fri, 22 May 2015 22:21:12 +0200 (CEST) Received: from pps.filterd (m0048193.ppops.net [127.0.0.1]) by mx0a-000f0801.pphosted.com (8.14.7/8.14.7) with SMTP id t4MK0m0G004136; Fri, 22 May 2015 13:21:10 -0700 Received: from hq1wp-exchub01.corp.brocade.com ([144.49.131.13]) by mx0a-000f0801.pphosted.com with ESMTP id 1uhjqkk36f-3 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NOT); Fri, 22 May 2015 13:21:10 -0700 Received: from BRMWP-EXCHUB02.corp.brocade.com (172.16.187.99) by HQ1WP-EXCHUB01.corp.brocade.com (10.70.36.101) with Microsoft SMTP Server (TLS) id 14.3.123.3; Fri, 22 May 2015 13:20:58 -0700 Received: from BRMWP-EXMB11.corp.brocade.com (172.16.59.77) by BRMWP-EXCHUB02.corp.brocade.com (172.16.187.99) with Microsoft SMTP Server (TLS) id 14.3.123.3; Fri, 22 May 2015 14:20:58 -0600 Received: from urahara (10.72.40.90) by BRMWP-EXMB11.corp.brocade.com (172.16.59.77) with Microsoft SMTP Server (TLS) id 15.0.1044.25; Fri, 22 May 2015 14:20:57 -0600 Date: Fri, 22 May 2015 13:21:00 -0700 From: Stephen Hemminger <shemming@brocade.com> To: Cunming Liang <cunming.liang@intel.com> Message-ID: <20150522132100.3f0829e9@urahara> In-Reply-To: <1432198563-16334-6-git-send-email-cunming.liang@intel.com> References: <1430804386-28949-1-git-send-email-cunming.liang@intel.com> <1432198563-16334-1-git-send-email-cunming.liang@intel.com> <1432198563-16334-6-git-send-email-cunming.liang@intel.com> Organization: Brocade MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: hq1wp-excas12.corp.brocade.com (10.70.38.22) To BRMWP-EXMB11.corp.brocade.com (172.16.59.77) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.14.151, 1.0.33, 0.0.0000 definitions=2015-05-22_02:2015-05-22,2015-05-22,1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=1 spamscore=1 suspectscore=1 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=7.0.1-1402240000 definitions=main-1505220252 X-Mailman-Approved-At: Sat, 23 May 2015 21:32:39 +0200 Cc: dev@dpdk.org, liang-min.wang@intel.com Subject: Re: [dpdk-dev] [PATCH v8 05/11] eal/linux: add interrupt vectors handling on VFIO X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK <dev.dpdk.org> List-Unsubscribe: <http://dpdk.org/ml/options/dev>, <mailto:dev-request@dpdk.org?subject=unsubscribe> List-Archive: <http://dpdk.org/ml/archives/dev/> List-Post: <mailto:dev@dpdk.org> List-Help: <mailto:dev-request@dpdk.org?subject=help> List-Subscribe: <http://dpdk.org/ml/listinfo/dev>, <mailto:dev-request@dpdk.org?subject=subscribe> X-List-Received-Date: Fri, 22 May 2015 20:21:12 -0000 On Thu, 21 May 2015 16:55:57 +0800 Cunming Liang <cunming.liang@intel.com> wrote: > This patch does below: > - Create VFIO eventfds for each interrupt vector (move to next) > - Assign per interrupt vector's eventfd to VFIO by ioctl > > Signed-off-by: Danny Zhou <danny.zhou@intel.com> > Signed-off-by: Cunming Liang <cunming.liang@intel.com> One non-trivial performance related change here would be to set SMP affinity of the receive IRQ to the CPU that is handling that receive queue. Not sure the full API to do this, but ideally you should not have the receive interrupt occurring on one CPU then having to cause scheduler to wakeup receive thread on another CPU.