From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <dev-bounces@dpdk.org>
Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124])
	by inbox.dpdk.org (Postfix) with ESMTP id 6D4E4A0A0C;
	Thu, 15 Apr 2021 07:54:26 +0200 (CEST)
Received: from [217.70.189.124] (localhost [127.0.0.1])
	by mails.dpdk.org (Postfix) with ESMTP id 2C47B1615DC;
	Thu, 15 Apr 2021 07:54:26 +0200 (CEST)
Received: from mga18.intel.com (mga18.intel.com [134.134.136.126])
 by mails.dpdk.org (Postfix) with ESMTP id 1E430161229
 for <dev@dpdk.org>; Thu, 15 Apr 2021 07:54:23 +0200 (CEST)
IronPort-SDR: z0A4TFY1czKIZn/xIuSYBgrmzClQ9w6b9fbhDze1+AIP1FeFaK66B1cNJuVll/yOp3KcHJVM8Y
 8gJqqmezHSIA==
X-IronPort-AV: E=McAfee;i="6200,9189,9954"; a="182292734"
X-IronPort-AV: E=Sophos;i="5.82,223,1613462400"; d="scan'208";a="182292734"
Received: from fmsmga002.fm.intel.com ([10.253.24.26])
 by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384;
 14 Apr 2021 22:54:22 -0700
IronPort-SDR: V1mGNmpTAdUwxFfUmzIn0w9qyDpTHDRxK95RCZaAbw06GDZpnbV/OXmlvy19VahlXodPEt3t/g
 zbl459UCAraA==
X-ExtLoop1: 1
X-IronPort-AV: E=Sophos;i="5.82,223,1613462400"; d="scan'208";a="452776438"
Received: from orsmsx601.amr.corp.intel.com ([10.22.229.14])
 by fmsmga002.fm.intel.com with ESMTP; 14 Apr 2021 22:54:21 -0700
Received: from orsmsx610.amr.corp.intel.com (10.22.229.23) by
 ORSMSX601.amr.corp.intel.com (10.22.229.14) with Microsoft SMTP Server
 (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id
 15.1.2106.2; Wed, 14 Apr 2021 22:54:21 -0700
Received: from orsmsx612.amr.corp.intel.com (10.22.229.25) by
 ORSMSX610.amr.corp.intel.com (10.22.229.23) with Microsoft SMTP Server
 (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id
 15.1.2106.2; Wed, 14 Apr 2021 22:54:21 -0700
Received: from ORSEDG601.ED.cps.intel.com (10.7.248.6) by
 orsmsx612.amr.corp.intel.com (10.22.229.25) with Microsoft SMTP Server
 (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2106.2
 via Frontend Transport; Wed, 14 Apr 2021 22:54:21 -0700
Received: from NAM11-CO1-obe.outbound.protection.outlook.com (104.47.56.170)
 by edgegateway.intel.com (134.134.137.102) with Microsoft SMTP Server
 (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id
 15.1.2106.2; Wed, 14 Apr 2021 22:54:20 -0700
ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none;
 b=JYJULxzN2LbrKgOn2HCWbq792lxZvIZPyWtqSMwEQ9hiPwsi1z8nqFoUpGGscLoHOvmwc2z4Mxh3SQRXBu+xEJC+HjYFHlBCjC599jfRLMLWqlNAP8E5MJv6sVCSRpN7f466Rxq5VRHlvvCL16QMNa+ys3caUFUGoEM5+7/icsvuPJZNg66GdsnVDLUihxm7oO44oGl8Lxdn5WgZ0e8WAoaZuf71zX83RXGVCDfTG0GN2MwjzolrMC5WRkPZh3UiGcamjMoApUQ43SSWGEQ7fGMdUVbpIbUgJkjU8W8O3juzyDgv0QN7Wsg7pQLoWxGHdOkQdAsmiR6W5raIPlOkSA==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; 
 s=arcselector9901;
 h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;
 bh=OGG25y/ihBOsVE4sCSvaK56OpTIogIY7A/zC/aIcjF0=;
 b=h1OuSM1anNJoDpaQXHCmspASYljtH/NS2ByjASPScKwuvzVauyzZcZN0r5qpuOe4RhJpMR5x2ywrZHDxhEV869HxLaLaIZy1t9tWN0lyDcvM4jUVZB427yfD55UtCPjUqaj/zbhco4fKTIjm8GWW0DzC5CY93CAKztNxx5TiYoaiUOcCVI2vJdcOU2qbDz4h+YOWaKbKlxkjf3NZSlV2LMEpwiPcXpc+Z2RZoD714q18ltWWxVyz1OzQgsJmuPTnlHS2UhRFTaElKT9TZccwNiZEz9EgGVMl16UanEtPCXKsJNLAUaAnp+8I8yjvFoukGrWzvBlTzxgXgNMBQERu7w==
ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass
 smtp.mailfrom=intel.com; dmarc=pass action=none header.from=intel.com;
 dkim=pass header.d=intel.com; arc=none
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=intel.onmicrosoft.com; 
 s=selector2-intel-onmicrosoft-com;
 h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;
 bh=OGG25y/ihBOsVE4sCSvaK56OpTIogIY7A/zC/aIcjF0=;
 b=Vut4U0wFMjgAAkAvhifTiQXQeDe+3EwV41fwU5ykzI3UJFP7okTlhM8RVXe5KMoBtwTTUvm77e+Vs2KR6Q8dxIk6/fRNGIYzQx8peJvoW6ET5cn4F5BSVVn9OmRxyssB2iU1ae/TmHUyof3f3FeqqXcFD/YOmBRMg1fhVLtw4yI=
Received: from SJ0PR11MB5006.namprd11.prod.outlook.com (2603:10b6:a03:2db::22)
 by BY5PR11MB4225.namprd11.prod.outlook.com (2603:10b6:a03:1ba::25)
 with Microsoft SMTP Server (version=TLS1_2,
 cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4020.18; Thu, 15 Apr
 2021 05:54:15 +0000
Received: from SJ0PR11MB5006.namprd11.prod.outlook.com
 ([fe80::522:5b2:4210:a4b3]) by SJ0PR11MB5006.namprd11.prod.outlook.com
 ([fe80::522:5b2:4210:a4b3%7]) with mapi id 15.20.4020.023; Thu, 15 Apr 2021
 05:54:15 +0000
From: "Jiang, Cheng1" <cheng1.jiang@intel.com>
To: "Hu, Jiayu" <jiayu.hu@intel.com>, "maxime.coquelin@redhat.com"
 <maxime.coquelin@redhat.com>, "Xia, Chenbo" <chenbo.xia@intel.com>
CC: "dev@dpdk.org" <dev@dpdk.org>, "Yang, YvonneX" <yvonnex.yang@intel.com>,
 "Wang, Yinan" <yinan.wang@intel.com>, "Liu, Yong" <yong.liu@intel.com>
Thread-Topic: [PATCH v7 2/4] vhost: add support for packed ring in async vhost
Thread-Index: AQHXMPdNDLSXmjETWEqh5gZQ4zwAAaq01O8AgAA+AZA=
Date: Thu, 15 Apr 2021 05:54:15 +0000
Message-ID: <SJ0PR11MB50068A1952276E721B84F001DC4D9@SJ0PR11MB5006.namprd11.prod.outlook.com>
References: <20210317085426.10119-1-Cheng1.jiang@intel.com>
 <20210414061343.54919-1-Cheng1.jiang@intel.com>
 <20210414061343.54919-3-Cheng1.jiang@intel.com>
 <ca2a2909f03f441da2c45a57305c1e14@intel.com>
In-Reply-To: <ca2a2909f03f441da2c45a57305c1e14@intel.com>
Accept-Language: zh-CN, en-US
Content-Language: en-US
X-MS-Has-Attach: 
X-MS-TNEF-Correlator: 
authentication-results: intel.com; dkim=none (message not signed)
 header.d=none;intel.com; dmarc=none action=none header.from=intel.com;
x-originating-ip: [192.55.46.54]
x-ms-publictraffictype: Email
x-ms-office365-filtering-correlation-id: 2c637b05-787a-47f9-9dce-08d8ffd2e6f4
x-ms-traffictypediagnostic: BY5PR11MB4225:
x-ld-processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr
x-ms-exchange-transport-forked: True
x-microsoft-antispam-prvs: <BY5PR11MB4225055F7A77186B8851FEF6DC4D9@BY5PR11MB4225.namprd11.prod.outlook.com>
x-ms-oob-tlc-oobclassifiers: OLM:475;
x-ms-exchange-senderadcheck: 1
x-microsoft-antispam: BCL:0;
x-microsoft-antispam-message-info: jM0MGt14YkeeyhIJQk8hX4lbQxUZDs+xodsQRF59fNCEq0ouZ7QUvJuCs+fkSpmW+0c8XCYNabyNA4+Dvw0E9GFIsMEqFq33vImJp+FiJI+IX+ouCSgTKRSsfgFxrGTnWuuAF/WtLpgIT9IVqME1v7PAWWQ8Bh+/IRL7gUjFDaBCyNPQ24yBYxa7xfde5eJ/pERTREo5My4w7eey3IgHZPgL9M2rgbXFVBbfMKHdEl+72KB8DZxBkdXzH5mENEWUQU0u6aOWm/H5Aji7mVqnzp4SDGTs/reH3xOhQXvC6Puw0zXCgvlDvJwywl4Xqvq0uRFZE1savQid8hzyOczyLvHZDaUPa10R24CedJFZjJgzuzlDZRAEEa3XN9mZfkV0/IRA/1QC0e5NHBViYMks1SoUdNoBv3M7z9P6Xu4tXjJhCWK/dho9EpcnCfkIF43MCS2jrB+tFOXG3oH9/XJX9qrHhHMiKKE508JOTZ4eZTrXABe6sKb/aQZ0AKK6t13xxq2+qls86hGU2UqCwTBtwqfN+gnqgliTEIEvX07U1QQHOBkx0BJreP1jh+rzg7DOhj6mYrY9Wa0nNj8/LgDRm993MUoT83385xaaYn53v+0=
x-forefront-antispam-report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:;
 IPV:NLI; SFV:NSPM; H:SJ0PR11MB5006.namprd11.prod.outlook.com; PTR:; CAT:NONE;
 SFS:(396003)(346002)(366004)(136003)(376002)(39860400002)(316002)(8676002)(54906003)(4326008)(8936002)(26005)(53546011)(83380400001)(186003)(110136005)(30864003)(55016002)(6506007)(9686003)(76116006)(7696005)(6636002)(66946007)(2906002)(122000001)(52536014)(38100700002)(64756008)(66446008)(66556008)(86362001)(66476007)(107886003)(478600001)(71200400001)(5660300002)(33656002);
 DIR:OUT; SFP:1102; 
x-ms-exchange-antispam-messagedata: =?us-ascii?Q?plmLOKd4DC52ikHVJI1yMhMY6sbpFI92aV5C5eQzZVYii/IUYWZ6ld16mAs/?=
 =?us-ascii?Q?Uv74NdgvQzOQZmoGGeU5/RAsCbzWrPcKE7XwXzwKqRzhDVrRmSpv77WwIomF?=
 =?us-ascii?Q?bdG/KNmEhAih6gJqW/US+X6c0ArqA5lSZxRdGdnGhEqVQoV99KUM/HbgOyZw?=
 =?us-ascii?Q?qFYKABr8oGOT31Q8kVS4TOe06ISGdh5F0a9H31hNIomMC/vzo0gIfDYuSLsV?=
 =?us-ascii?Q?L+UQ0mUcdKT7YUe+J8hugrC4LQILjWIQ5pAPXjnP0auieb36a2VliZmEBPKs?=
 =?us-ascii?Q?vDJKxEfVP5I+URkozn4DboZQlokS/yIYnVugGb5mMvWK14CEFjbzeSrddKNP?=
 =?us-ascii?Q?Oy23eBRuD3t4keE6szPbNtv2iOIGbptj2NmxmpUMPXABudwfI+EVr/QY/z9g?=
 =?us-ascii?Q?IhiF5mbwIsL3pj6/B4t61pg5Jsoz2wianMk/WkVoCQeeUSdfUH50ycqA8h8U?=
 =?us-ascii?Q?q+soRfTXhjnxEuqCC2+IWOAvHb8C7hN332Cq0DU17NQwc0Q25sl+mh3ZO9GT?=
 =?us-ascii?Q?WhlFsaztHEAMxBaAi+Uc9yWcNGcdNW3h+o4Di0YOELh1Ibq4wFCbzfvAGp/E?=
 =?us-ascii?Q?afMHODZ9M3hPaGGOgRDD5xyL+BPpIRXPpeEODE1Kanh6gVGE2tpmyiHHe5g8?=
 =?us-ascii?Q?8oYJ8c+08r3N0ZQs+VoUfokfdxeNmsHrM17tqLdaDO2bSTrGgC2B2bFSKqA7?=
 =?us-ascii?Q?Zxe7qdueGBGeweXvcdhYiNB5HeIR56LA001PBdob/rdGk3hsILlwQOTdrDhO?=
 =?us-ascii?Q?9niglKtfwaRjnkMIn+fmsXUcu7hsKKBDViRJYksdbUUUfXSx1i4VVqbR3zF4?=
 =?us-ascii?Q?IEosxKaQbwlQzlyh9UVF3cXy6BQVtOQK9IXue2MbHw93qdTh3Ge94rZyb/KR?=
 =?us-ascii?Q?iZjB8KO7kz965KVZBND+hAU0wwxlI3XIC1Ep+BMInxFSaWrwo3RIep5Spwqq?=
 =?us-ascii?Q?m1X1UoTF+i2uzvcWbdc/To4FFvq/dvuVgtnD8xoHWOlpAQQkcJZwGc/xK+Ll?=
 =?us-ascii?Q?b02FkYpI7guihn6wdCkAszPbyxoOWWRWc8nH353x/TmOvuudEwyDNO4A8M+5?=
 =?us-ascii?Q?VC0ogOssGYSoqLchFAQljNVHjie4LalnKD7K5fPB1kqgtN4JT3/4JChZDs8B?=
 =?us-ascii?Q?pFSjs/bpijR9db5nbxROZrMBMjWtiUPQFCI6vGKK6/gdopIwYVLjQxX+N+am?=
 =?us-ascii?Q?C6NauU9IkMpe7rjNGcwEUbnF6vZtDFmoFAgGzcv4FqhRcOkc+lZ21w5hQ68p?=
 =?us-ascii?Q?C6UZBsr3TbtZ/vIu0zHJzJHPZaBBm/MwvT5sPdJe425oezXqPPoC5U/hwswj?=
 =?us-ascii?Q?hGA=3D?=
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: SJ0PR11MB5006.namprd11.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 2c637b05-787a-47f9-9dce-08d8ffd2e6f4
X-MS-Exchange-CrossTenant-originalarrivaltime: 15 Apr 2021 05:54:15.4188 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: 9lC75C1T/KVS38pp8EeEfbssSmcWozMnxe08zqYo6LOEfxeG/BAAJSBnM534vChlhkIqBcPdMZHW3y4yCKg1Yg==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR11MB4225
X-OriginatorOrg: intel.com
Subject: Re: [dpdk-dev] [PATCH v7 2/4] vhost: add support for packed ring in
 async vhost
X-BeenThere: dev@dpdk.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: DPDK patches and discussions <dev.dpdk.org>
List-Unsubscribe: <https://mails.dpdk.org/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://mails.dpdk.org/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <https://mails.dpdk.org/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
Errors-To: dev-bounces@dpdk.org
Sender: "dev" <dev-bounces@dpdk.org>

Hi Jiayu,

> -----Original Message-----
> From: Hu, Jiayu <jiayu.hu@intel.com>
> Sent: Thursday, April 15, 2021 10:03 AM
> To: Jiang, Cheng1 <cheng1.jiang@intel.com>; maxime.coquelin@redhat.com;
> Xia, Chenbo <chenbo.xia@intel.com>
> Cc: dev@dpdk.org; Yang, YvonneX <yvonnex.yang@intel.com>; Wang, Yinan
> <yinan.wang@intel.com>; Liu, Yong <yong.liu@intel.com>
> Subject: RE: [PATCH v7 2/4] vhost: add support for packed ring in async v=
host
>=20
> Hi Cheng,
>=20
> > -----Original Message-----
> > From: Jiang, Cheng1 <cheng1.jiang@intel.com>
> > Sent: Wednesday, April 14, 2021 2:14 PM
> > To: maxime.coquelin@redhat.com; Xia, Chenbo <chenbo.xia@intel.com>
> > Cc: dev@dpdk.org; Hu, Jiayu <jiayu.hu@intel.com>; Yang, YvonneX
> > <yvonnex.yang@intel.com>; Wang, Yinan <yinan.wang@intel.com>; Liu,
> > Yong <yong.liu@intel.com>; Jiang, Cheng1 <cheng1.jiang@intel.com>
> > Subject: [PATCH v7 2/4] vhost: add support for packed ring in async
> > vhost
> >
> > For now async vhost data path only supports split ring. This patch
> > enables packed ring in async vhost data path to make async vhost
> > compatible with virtio 1.1 spec.
> >
> > Signed-off-by: Cheng Jiang <Cheng1.jiang@intel.com>
> > ---
> >  lib/librte_vhost/rte_vhost_async.h |   1 +
> >  lib/librte_vhost/vhost.c           |  49 ++--
> >  lib/librte_vhost/vhost.h           |  15 +-
> >  lib/librte_vhost/virtio_net.c      | 432 +++++++++++++++++++++++++++--
> >  4 files changed, 456 insertions(+), 41 deletions(-)
> >
> > diff --git a/lib/librte_vhost/rte_vhost_async.h
> > b/lib/librte_vhost/rte_vhost_async.h
> > index c855ff875..6faa31f5a 100644
> > --- a/lib/librte_vhost/rte_vhost_async.h
> > +++ b/lib/librte_vhost/rte_vhost_async.h
> > @@ -89,6 +89,7 @@ struct rte_vhost_async_channel_ops {  struct
> > async_inflight_info {  struct rte_mbuf *mbuf;  uint16_t descs; /* num
> > of descs inflight */
> > +uint16_t nr_buffers; /* num of buffers inflight for packed ring */
> >  };
> >
> >  /**
> > diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c index
> > a70fe01d8..f509186c6 100644
> > --- a/lib/librte_vhost/vhost.c
> > +++ b/lib/librte_vhost/vhost.c
> > @@ -338,19 +338,22 @@ cleanup_device(struct virtio_net *dev, int
> > destroy)  }
> >
> >  static void
> > -vhost_free_async_mem(struct vhost_virtqueue *vq)
> > +vhost_free_async_mem(struct virtio_net *dev, struct vhost_virtqueue
> > +*vq)
> >  {
> > -if (vq->async_pkts_info)
> > -rte_free(vq->async_pkts_info);
> > -if (vq->async_descs_split)
> > +rte_free(vq->async_pkts_info);
> > +
> > +if (vq_is_packed(dev)) {
> > +rte_free(vq->async_buffers_packed);
> > +vq->async_buffers_packed =3D NULL;
> > +} else {
> >  rte_free(vq->async_descs_split);
> > -if (vq->it_pool)
> > -rte_free(vq->it_pool);
> > -if (vq->vec_pool)
> > -rte_free(vq->vec_pool);
> > +vq->async_descs_split =3D NULL;
> > +}
> > +
> > +rte_free(vq->it_pool);
> > +rte_free(vq->vec_pool);
> >
> >  vq->async_pkts_info =3D NULL;
> > -vq->async_descs_split =3D NULL;
> >  vq->it_pool =3D NULL;
> >  vq->vec_pool =3D NULL;
> >  }
> > @@ -360,10 +363,10 @@ free_vq(struct virtio_net *dev, struct
> > vhost_virtqueue *vq)  {  if (vq_is_packed(dev))
> > rte_free(vq->shadow_used_packed); -else {
> > +else
> >  rte_free(vq->shadow_used_split);
> > -vhost_free_async_mem(vq);
> > -}
> > +
> > +vhost_free_async_mem(dev, vq);
> >  rte_free(vq->batch_copy_elems);
> >  if (vq->iotlb_pool)
> >  rte_mempool_free(vq->iotlb_pool);
> > @@ -1626,10 +1629,9 @@ int rte_vhost_async_channel_register(int vid,
> > uint16_t queue_id,  if (unlikely(vq =3D=3D NULL || !dev->async_copy))
> > return -1;
> >
> > -/* packed queue is not supported */
> > -if (unlikely(vq_is_packed(dev) || !f.async_inorder)) {
> > +if (unlikely(!f.async_inorder)) {
> >  VHOST_LOG_CONFIG(ERR,
> > -"async copy is not supported on packed queue or non-inorder mode "
> > +"async copy is not supported on non-inorder mode "
> >  "(vid %d, qid: %d)\n", vid, queue_id);  return -1;  } @@ -1667,12
> > +1669,19 @@ int rte_vhost_async_channel_register(int vid, uint16_t
> > queue_id,  vq->vec_pool =3D rte_malloc_socket(NULL,
> VHOST_MAX_ASYNC_VEC
> > * sizeof(struct iovec),  RTE_CACHE_LINE_SIZE, node);
> > -vq->async_descs_split =3D rte_malloc_socket(NULL,
> > +if (vq_is_packed(dev)) {
> > +vq->async_buffers_packed =3D rte_malloc_socket(NULL, size *
> > +vq->sizeof(struct vring_used_elem_packed),
> > +RTE_CACHE_LINE_SIZE, node);
> > +} else {
> > +vq->async_descs_split =3D rte_malloc_socket(NULL,
> >  vq->size * sizeof(struct vring_used_elem),  RTE_CACHE_LINE_SIZE,
> > node); -if (!vq->async_descs_split || !vq->async_pkts_info ||
> > -!vq->it_pool || !vq->vec_pool) { -vhost_free_async_mem(vq);
> > +}
> > +
> > +if (!vq->async_buffers_packed || !vq->async_descs_split ||
> async_buffers_packed and async_descs_split are two members of a union.
> Like the way processed in vhost_free_async_mem(), do you think it's bette=
r
> to check if they are NULL in if-else respectively?

Sure, make sense to me. I'll fix them together with other async mem check.

>=20
> > +!vq->async_pkts_info || !vq->it_pool || !vq->vec_pool) {
> > +vhost_free_async_mem(dev, vq);
> >  VHOST_LOG_CONFIG(ERR,
> >  "async register failed: cannot allocate memory for vq data "
> >  "(vid %d, qid: %d)\n", vid, queue_id); @@ -1728,7 +1737,7 @@ int
> > rte_vhost_async_channel_unregister(int vid, uint16_t queue_id)  goto
> > out;  }
> >
> > -vhost_free_async_mem(vq);
> > +vhost_free_async_mem(dev, vq);
> >
> >  vq->async_ops.transfer_data =3D NULL;
> >  vq->async_ops.check_completed_copies =3D NULL; diff --git
> > a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h index
> > f628714c2..673335217 100644
> > --- a/lib/librte_vhost/vhost.h
> > +++ b/lib/librte_vhost/vhost.h
> > @@ -201,9 +201,18 @@ struct vhost_virtqueue {  uint16_tasync_pkts_idx;
> > uint16_tasync_pkts_inflight_n;  uint16_tasync_last_pkts_n; -struct
> > vring_used_elem  *async_descs_split; -uint16_t async_desc_idx;
> > -uint16_t last_async_desc_idx;
> > +union {
> > +struct vring_used_elem  *async_descs_split; struct
> > +vring_used_elem_packed *async_buffers_packed; }; union { uint16_t
> > +async_desc_idx; uint16_t async_packed_buffer_idx; }; union { uint16_t
> > +last_async_desc_idx; uint16_t last_async_buffer_idx; };
> >
> >  /* vq async features */
> >  boolasync_inorder;
> > diff --git a/lib/librte_vhost/virtio_net.c
> > b/lib/librte_vhost/virtio_net.c index 438bdafd1..54e11e3a5 100644
> > --- a/lib/librte_vhost/virtio_net.c
> > +++ b/lib/librte_vhost/virtio_net.c
> > @@ -363,14 +363,14 @@
> > vhost_shadow_dequeue_single_packed_inorder(struct vhost_virtqueue
> *vq,
> > }
> >
> >  static __rte_always_inline void
> > -vhost_shadow_enqueue_single_packed(struct virtio_net *dev,
> > -   struct vhost_virtqueue *vq,
> > -   uint32_t len[],
> > -   uint16_t id[],
> > -   uint16_t count[],
> > +vhost_shadow_enqueue_packed(struct vhost_virtqueue *vq,
> > +   uint32_t *len,
> > +   uint16_t *id,
> > +   uint16_t *count,
> >     uint16_t num_buffers)
> >  {
> >  uint16_t i;
> > +
> >  for (i =3D 0; i < num_buffers; i++) {
> >  /* enqueue shadow flush action aligned with batch num */  if
> > (!vq->shadow_used_idx) @@ -382,6 +382,17 @@
> > vhost_shadow_enqueue_single_packed(struct
> > virtio_net *dev,
> >  vq->shadow_aligned_idx +=3D count[i];
> >  vq->shadow_used_idx++;
> >  }
> > +}
> > +
> > +static __rte_always_inline void
> > +vhost_shadow_enqueue_single_packed(struct virtio_net *dev,
> > +   struct vhost_virtqueue *vq,
> > +   uint32_t *len,
> > +   uint16_t *id,
> > +   uint16_t *count,
> > +   uint16_t num_buffers)
> > +{
> > +vhost_shadow_enqueue_packed(vq, len, id, count, num_buffers);
> >
> >  if (vq->shadow_aligned_idx >=3D PACKED_BATCH_SIZE) {
> > do_data_copy_enqueue(dev, vq); @@ -1474,6 +1485,23 @@
> > store_dma_desc_info_split(struct vring_used_elem *s_ring, struct
> > vring_used_elem  }  }
> >
> > +static __rte_always_inline void
> > +store_dma_desc_info_packed(struct vring_used_elem_packed *s_ring,
> > +struct vring_used_elem_packed *d_ring, uint16_t ring_size, uint16_t
> > +s_idx, uint16_t d_idx, uint16_t
> > count)
> > +{
> > +uint16_t elem_size =3D sizeof(struct vring_used_elem_packed);
> > +
> > +if (d_idx + count <=3D ring_size) {
> > +rte_memcpy(d_ring + d_idx, s_ring + s_idx, count *
> > elem_size);
> > +} else {
> > +uint16_t size =3D ring_size - d_idx;
> > +
> > +rte_memcpy(d_ring + d_idx, s_ring + s_idx, size * elem_size);
> > +rte_memcpy(d_ring, s_ring + s_idx + size, (count - size) *
> > elem_size);
> > +}
> > +}
> > +
> >  static __rte_noinline uint32_t
> >  virtio_dev_rx_async_submit_split(struct virtio_net *dev,  struct
> > vhost_virtqueue *vq, uint16_t queue_id, @@ -1641,6 +1669,330 @@
> > virtio_dev_rx_async_submit_split(struct
> > virtio_net *dev,
> >  return pkt_idx;
> >  }
> >
> > +static __rte_always_inline void
> > +vhost_update_used_packed(struct vhost_virtqueue *vq, struct
> > +vring_used_elem_packed *shadow_ring, uint16_t count) { int i;
> > +uint16_t used_idx =3D vq->last_used_idx; uint16_t head_idx =3D
> > +vq->last_used_idx; uint16_t head_flags =3D 0;
> > +
> > +if (count =3D=3D 0)
> > +return;
> > +
> > +/* Split loop in two to save memory barriers */ for (i =3D 0; i <
> > +count; i++) {
> > +vq->desc_packed[used_idx].id =3D shadow_ring[i].id;
> > +vq->desc_packed[used_idx].len =3D shadow_ring[i].len;
> > +
> > +used_idx +=3D shadow_ring[i].count;
> > +if (used_idx >=3D vq->size)
> > +used_idx -=3D vq->size;
> > +}
> > +
> > +/* The ordering for storing desc flags needs to be enforced. */
> > +rte_atomic_thread_fence(__ATOMIC_RELEASE);
> > +
> > +for (i =3D 0; i < count; i++) {
> > +uint16_t flags;
> > +
> > +if (vq->shadow_used_packed[i].len)
> > +flags =3D VRING_DESC_F_WRITE;
> > +else
> > +flags =3D 0;
> > +
> > +if (vq->used_wrap_counter) {
> > +flags |=3D VRING_DESC_F_USED;
> > +flags |=3D VRING_DESC_F_AVAIL;
> > +} else {
> > +flags &=3D ~VRING_DESC_F_USED;
> > +flags &=3D ~VRING_DESC_F_AVAIL;
> > +}
> > +
> > +if (i > 0) {
> > +vq->desc_packed[vq->last_used_idx].flags =3D flags;
> > +
> No need a blank line above.

Sure, thanks.

>=20
> > +} else {
> > +head_idx =3D vq->last_used_idx;
> > +head_flags =3D flags;
> > +}
> > +
> > +vq_inc_last_used_packed(vq, shadow_ring[i].count); }
> > +
> > +vq->desc_packed[head_idx].flags =3D head_flags;
> > +}
> > +
> > +static __rte_always_inline int
> > +vhost_enqueue_async_single_packed(struct virtio_net *dev,
> > +    struct vhost_virtqueue *vq,
> > +    struct rte_mbuf *pkt,
> > +    struct buf_vector *buf_vec,
> > +    uint16_t *nr_descs,
> > +    uint16_t *nr_buffers,
> > +    struct vring_packed_desc *async_descs,
> > +    struct iovec *src_iovec, struct iovec *dst_iovec,
> > +    struct rte_vhost_iov_iter *src_it,
> > +    struct rte_vhost_iov_iter *dst_it) { uint16_t nr_vec =3D 0;
> > +uint16_t avail_idx =3D vq->last_avail_idx; uint16_t max_tries, tries =
=3D
> > +0; uint16_t buf_id =3D 0; uint32_t len =3D 0; uint16_t desc_count =3D =
0;
> > +uint32_t size =3D pkt->pkt_len + sizeof(struct
> > virtio_net_hdr_mrg_rxbuf);
> > +uint32_t buffer_len[vq->size];
> > +uint16_t buffer_buf_id[vq->size];
> > +uint16_t buffer_desc_count[vq->size]; *nr_buffers =3D 0;
> > +
> > +if (rxvq_is_mergeable(dev))
> > +max_tries =3D vq->size - 1;
> > +else
> > +max_tries =3D 1;
> > +
> > +while (size > 0) {
> > +/*
> > + * if we tried all available ring items, and still
> > + * can't get enough buf, it means something abnormal
> > + * happened.
> > + */
> > +if (unlikely(++tries > max_tries))
> > +return -1;
> > +
> > +if (unlikely(fill_vec_buf_packed(dev, vq, avail_idx,
> > &desc_count, buf_vec, &nr_vec,
> > +&buf_id, &len,
> > VHOST_ACCESS_RW) < 0))
> > +return -1;
> > +
> > +len =3D RTE_MIN(len, size);
> > +size -=3D len;
> > +
> > +buffer_len[*nr_buffers] =3D len;
> > +buffer_buf_id[*nr_buffers] =3D buf_id;
> > +buffer_desc_count[*nr_buffers] =3D desc_count; *nr_buffers +=3D 1;
> > +
> > +*nr_descs +=3D desc_count;
> > +avail_idx +=3D desc_count;
> > +if (avail_idx >=3D vq->size)
> > +avail_idx -=3D vq->size;
> > +}
> > +
> > +if (async_mbuf_to_desc(dev, vq, pkt, buf_vec, nr_vec, *nr_buffers,
> > src_iovec, dst_iovec,
> > +src_it, dst_it) < 0)
> > +return -1;
> > +/* store descriptors for DMA */
> > +if (avail_idx >=3D *nr_descs) {
> > +rte_memcpy(async_descs, &vq->desc_packed[vq-
> > >last_avail_idx],
> > +*nr_descs * sizeof(struct vring_packed_desc)); } else { uint16_t
> > +nr_copy =3D vq->size - vq->last_avail_idx; rte_memcpy(async_descs,
> > +&vq->desc_packed[vq-
> > >last_avail_idx],
> > +nr_copy * sizeof(struct vring_packed_desc)); rte_memcpy(async_descs +
> > +nr_copy, vq->desc_packed, (*nr_descs - nr_copy) * sizeof(struct
> > vring_packed_desc));
> > +}
> > +
> > +vhost_shadow_enqueue_packed(vq, buffer_len, buffer_buf_id,
> > buffer_desc_count, *nr_buffers);
> > +
> > +return 0;
> > +}
> > +
> > +static __rte_always_inline int16_t
> > +virtio_dev_rx_async_single_packed(struct virtio_net *dev, struct
> > vhost_virtqueue *vq,
> > +    struct rte_mbuf *pkt, uint16_t *nr_descs, uint16_t
> > *nr_buffers,
> > +    struct vring_packed_desc *async_descs,
> > +    struct iovec *src_iovec, struct iovec *dst_iovec,
> > +    struct rte_vhost_iov_iter *src_it, struct
> > rte_vhost_iov_iter *dst_it)
> > +{
> > +struct buf_vector buf_vec[BUF_VECTOR_MAX]; *nr_descs =3D 0;
> *nr_buffers
> > +=3D 0;
> > +
> > +if (unlikely(vhost_enqueue_async_single_packed(dev, vq, pkt,
> > buf_vec, nr_descs, nr_buffers,
> > + async_descs, src_iovec,
> > dst_iovec,
> > + src_it, dst_it) < 0)) {
> > +VHOST_LOG_DATA(DEBUG, "(%d) failed to get enough desc
> > from vring\n", dev->vid);
> > +return -1;
> > +}
> > +
> > +VHOST_LOG_DATA(DEBUG, "(%d) current index %d | end
> > index %d\n",
> > +dev->vid, vq->last_avail_idx, vq->last_avail_idx +
> > *nr_descs);
> > +
> > +return 0;
> > +}
> > +
> > +static __rte_always_inline void
> > +dma_error_handler_packed(struct vhost_virtqueue *vq, struct
> > vring_packed_desc *async_descs,
> > +uint16_t async_descs_idx, uint16_t slot_idx, uint32_t
> > nr_err,
> > +uint32_t *pkt_idx, uint32_t *num_async_pkts,
> > uint32_t *num_done_pkts)
> > +{
> > +uint16_t descs_err =3D 0;
> > +uint16_t buffers_err =3D 0;
> > +struct async_inflight_info *pkts_info =3D vq->async_pkts_info;
> > +
> > +*num_async_pkts -=3D nr_err;
> > +*pkt_idx -=3D nr_err;
> > +/* calculate the sum of buffers and descs of DMA-error packets. */
> > +while (nr_err-- > 0) { descs_err +=3D pkts_info[slot_idx %
> > +vq->size].descs;
> I notice there are several parts using "%" to wrap around index, but exis=
ted
> code uses "& (vq->size - 1)" instead. I think it's better to keep it cons=
istent.

Unlike split ring, packed ring size is not necessarily a power of 2. So I c=
an't use "& (vq->size - 1) in packed ring.

Thanks,
Cheng

>=20
> Thanks,
> Jiayu