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From: David Marchand <david.marchand@redhat.com>
To: "Wang, Haiyue" <haiyue.wang@intel.com>
Cc: dev <dev@dpdk.org>, "pvalerio@redhat.com" <pvalerio@redhat.com>,
	Aaron Conole <aconole@redhat.com>,
	 "Zhang, Qi Z" <qi.z.zhang@intel.com>,
	"Rong, Leyi" <leyi.rong@intel.com>,
	 "Tu, Lijuan" <lijuan.tu@intel.com>,
	dpdk stable <stable@dpdk.org>, "Guo, Jia" <jia.guo@intel.com>,
	 "Richardson, Bruce" <bruce.richardson@intel.com>,
	 "Ananyev, Konstantin" <konstantin.ananyev@intel.com>,
	 Jerin Jacob Kollanukkaran <jerinj@marvell.com>,
	 "Ruifeng Wang (Arm Technology China)" <ruifeng.wang@arm.com>
Subject: Re: [dpdk-dev] [PATCH v1] net/ixgbe: adjust error for UDP with zero checksum
Date: Tue, 2 Feb 2021 13:53:53 +0100
Message-ID: <CAJFAV8wxeHyM5adb=QExj096JqAYfxqQTkX2ha2J2U_uv1fgYw@mail.gmail.com> (raw)
In-Reply-To: <BN8PR11MB37954C3814B692D1BCF9927DF7B59@BN8PR11MB3795.namprd11.prod.outlook.com>

On Tue, Feb 2, 2021 at 1:42 PM Wang, Haiyue <haiyue.wang@intel.com> wrote:
> > If the driver/hw can't report a valid checksum hint, it should
> > announce it does not know if the checksum is valid (neither bad, nor
> > good).
> >
> > So the workaround for udp packets (on this hw model) would be to
> > report PKT_RX_L4_CKSUM_UNKNOWN.
> > The sw application will then have to recompute the checksum itself if needed.
> >
>
> Make sense, but not sure the vector path can handle this more easily. Will try.

Refining this a bit.
It looks like hw correctly reports "good" checksums, so maybe instead
report PKT_RX_L4_CKSUM_UNKNOWN only for reports of "bad" checksums
from the hw?

-- 
David Marchand


  reply	other threads:[~2021-02-02 12:54 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-02  7:06 Haiyue Wang
2021-02-02  9:45 ` David Marchand
2021-02-02 12:42   ` Wang, Haiyue
2021-02-02 12:53     ` David Marchand [this message]
2021-02-02 12:56       ` Wang, Haiyue
2021-02-02 14:28         ` Wang, Haiyue
2021-02-02 17:42           ` Paolo Valerio
2021-02-02 12:54   ` Wang, Haiyue
2021-02-03  2:19 ` [dpdk-dev] [PATCH v2] net/ixgbe: fix UDP zero checksum error Haiyue Wang
2021-02-03  8:07   ` Zhang, Qi Z
2021-02-03  8:32     ` David Marchand
2021-02-04  7:45       ` Zhang, Qi Z
2021-02-04 14:39 ` [dpdk-dev] [PATCH v3] " Haiyue Wang
2021-02-05 17:50   ` Paolo Valerio
2021-02-07 18:40   ` Paolo Valerio
2021-02-08 13:48   ` Ananyev, Konstantin
2021-02-09  1:23     ` Zhang, Qi Z
2021-02-25 10:54   ` [dpdk-dev] [dpdk-stable] " David Marchand
2021-04-07 11:53     ` David Marchand
2021-04-08  1:12       ` Wang, Haiyue

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