From: "Wang, Haiyue" <haiyue.wang@intel.com>
To: David Marchand <david.marchand@redhat.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-stable] [PATCH v1] net/ixgbe: adjust error for UDP with zero checksum
Date: Tue, 2 Feb 2021 12:56:56 +0000
Message-ID: <BN8PR11MB379578154CCD7A748AAA2AECF7B59@BN8PR11MB3795.namprd11.prod.outlook.com> (raw)
In-Reply-To: <CAJFAV8wxeHyM5adb=QExj096JqAYfxqQTkX2ha2J2U_uv1fgYw@mail.gmail.com>
> -----Original Message-----
> From: David Marchand <david.marchand@redhat.com>
> Sent: Tuesday, February 2, 2021 20:54
> To: Wang, Haiyue <haiyue.wang@intel.com>
> Cc: dev <dev@dpdk.org>; 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: [PATCH v1] net/ixgbe: adjust error for UDP with zero checksum
>
> 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?
I guess Paolo will complain about the performance drop for zero checksum
UDP. ;-)
>
> --
> David Marchand
next prev parent reply other threads:[~2021-02-02 12:57 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
2021-02-02 12:56 ` Wang, Haiyue [this message]
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-stable] [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-stable] [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 ` David Marchand
2021-04-07 11:53 ` David Marchand
2021-04-08 1:12 ` Wang, Haiyue
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