Message ID | C1042323-AA70-46AF-B4D2-24A470ED8DB9@cisco.com (mailing list archive) |
---|---|
State | Accepted, archived |
Delegated to: | Yuanhan Liu |
Headers |
Return-Path: <dev-bounces@dpdk.org> X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [IPv6:::1]) by dpdk.org (Postfix) with ESMTP id C49B337B8; Wed, 30 Nov 2016 10:18:46 +0100 (CET) Received: from rcdn-iport-9.cisco.com (rcdn-iport-9.cisco.com [173.37.86.80]) by dpdk.org (Postfix) with ESMTP id B1E4537A8 for <dev@dpdk.org>; Wed, 30 Nov 2016 10:18:44 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=1177; q=dns/txt; s=iport; t=1480497524; x=1481707124; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-id:content-transfer-encoding: mime-version; bh=uFNGiuW0DAYwpmGO9pl6Qezn+kM4u/oCGqMXcSvlOkI=; b=AT1MoZdaE6wM7GwZtY9F49rz87U7fb6QJ4Ec5s5i29P8CQZtsOr35Tn3 Rhgb9WCFefofsSxoydAj4k4P5IOKBiJ8vaeMdv3h8wQeT6NcF+80tbhQL 6QWwWNazTsoD5b9MBlZ2uAYfjgg/k1Q2yZmgotSJg79THqZ/cTO595wfx o=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: =?us-ascii?q?A0AHAwCEmD5Y/5hdJa1dGgEBAQECAQEBA?= =?us-ascii?q?QgBAQEBgzgBAQEBAR+BWweNPqoLgg6CB4YiAoF2PxQBAgEBAQEBAQFiHQuEaQI?= =?us-ascii?q?EJxM/EAIBPhAyJQIEDgWIba5aPYtUAQEBAQEBAQEBAQEBAQEBAQEBAQEBHIY+g?= =?us-ascii?q?X2Gd4NhgjAFmlUBkQ2QMkmRNAEeN4EXMAEBgyccgV1yhhKBMIENAQEB?= X-IronPort-AV: E=Sophos;i="5.31,573,1473120000"; d="scan'208";a="175282461" Received: from rcdn-core-1.cisco.com ([173.37.93.152]) by rcdn-iport-9.cisco.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 30 Nov 2016 09:18:43 +0000 Received: from XCH-ALN-019.cisco.com (xch-aln-019.cisco.com [173.36.7.29]) by rcdn-core-1.cisco.com (8.14.5/8.14.5) with ESMTP id uAU9Ih2a032252 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Wed, 30 Nov 2016 09:18:43 GMT Received: from xch-aln-017.cisco.com (173.36.7.27) by XCH-ALN-019.cisco.com (173.36.7.29) with Microsoft SMTP Server (TLS) id 15.0.1210.3; Wed, 30 Nov 2016 03:18:42 -0600 Received: from xch-aln-017.cisco.com ([173.36.7.27]) by XCH-ALN-017.cisco.com ([173.36.7.27]) with mapi id 15.00.1210.000; Wed, 30 Nov 2016 03:18:42 -0600 From: "Pierre Pfister (ppfister)" <ppfister@cisco.com> To: "dev@dpdk.org" <dev@dpdk.org> CC: Yuanhan Liu <yuanhan.liu@linux.intel.com>, Maxime Coquelin <maxime.coquelin@redhat.com> Thread-Topic: [dpdk-dev] [PATCH v2] virtio: tx with can_push when VERSION_1 is set Thread-Index: AQHSSuq+3VobKIFZrE+Y5YtuRB59Zw== Date: Wed, 30 Nov 2016 09:18:42 +0000 Message-ID: <C1042323-AA70-46AF-B4D2-24A470ED8DB9@cisco.com> References: <82834CFE-767C-41B0-9327-E64B8210E076@cisco.com> <46762894-5016-f634-c355-77af881685e6@redhat.com> <1FAE01C3-B03F-443A-A77C-579254A07E0E@cisco.com> <5c99bc35-839b-84b8-1df9-db80f288d7b7@redhat.com> <A0EE9DE0-C82E-44CF-BB85-245488B78034@cisco.com> <30923c66-8eaa-f7d4-2e6a-d65d8b254e8e@redhat.com> <6D3BD8A2-1567-42FA-9672-EE682D827A84@cisco.com> In-Reply-To: <6D3BD8A2-1567-42FA-9672-EE682D827A84@cisco.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.228.42.25] Content-Type: text/plain; charset="us-ascii" Content-ID: <7E4F872180971847A2AAC8B75D017D92@emea.cisco.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Subject: [dpdk-dev] [PATCH v2] virtio: tx with can_push when VERSION_1 is set 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> Errors-To: dev-bounces@dpdk.org Sender: "dev" <dev-bounces@dpdk.org> |
Commit Message
Pierre Pfister
Nov. 30, 2016, 9:18 a.m. UTC
Current virtio driver advertises VERSION_1 support,
but does not handle device's VERSION_1 support when
sending packets (it looks for ANY_LAYOUT feature,
which is absent).
This patch enables 'can_push' in tx path when VERSION_1
is advertised by the device.
This significantly improves small packets forwarding rate
towards devices advertising VERSION_1 feature.
Signed-off-by: Pierre Pfister <ppfister@cisco.com>
---
drivers/net/virtio/virtio_rxtx.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
Comments
On Wed, Nov 30, 2016 at 09:18:42AM +0000, Pierre Pfister (ppfister) wrote: > Current virtio driver advertises VERSION_1 support, > but does not handle device's VERSION_1 support when > sending packets (it looks for ANY_LAYOUT feature, > which is absent). > > This patch enables 'can_push' in tx path when VERSION_1 > is advertised by the device. > > This significantly improves small packets forwarding rate > towards devices advertising VERSION_1 feature. > > Signed-off-by: Pierre Pfister <ppfister@cisco.com> From the virtio spec point of view, that VERSION_1 implies ANY_LAYOUT, this patch is right and I think we could apply this patch. No objections? --yliu > --- > drivers/net/virtio/virtio_rxtx.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c > index 22d97a4..1e5a6b9 100644 > --- a/drivers/net/virtio/virtio_rxtx.c > +++ b/drivers/net/virtio/virtio_rxtx.c > @@ -1015,7 +1015,8 @@ virtio_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts) > } > > /* optimize ring usage */ > - if (vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) && > + if ((vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) || > + vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) && > rte_mbuf_refcnt_read(txm) == 1 && > RTE_MBUF_DIRECT(txm) && > txm->nb_segs == 1 && > -- > 2.7.4 (Apple Git-66)
On Wed, Nov 30, 2016 at 09:18:42AM +0000, Pierre Pfister (ppfister) wrote: > Current virtio driver advertises VERSION_1 support, > but does not handle device's VERSION_1 support when > sending packets (it looks for ANY_LAYOUT feature, > which is absent). > > This patch enables 'can_push' in tx path when VERSION_1 > is advertised by the device. > > This significantly improves small packets forwarding rate > towards devices advertising VERSION_1 feature. > > Signed-off-by: Pierre Pfister <ppfister@cisco.com> Applied to dpdk-next-virtio. Thanks. --yliu
diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c index 22d97a4..1e5a6b9 100644 --- a/drivers/net/virtio/virtio_rxtx.c +++ b/drivers/net/virtio/virtio_rxtx.c @@ -1015,7 +1015,8 @@ virtio_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts) } /* optimize ring usage */ - if (vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) && + if ((vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) || + vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) && rte_mbuf_refcnt_read(txm) == 1 && RTE_MBUF_DIRECT(txm) && txm->nb_segs == 1 &&