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From: Ali Alnubani <alialnu@nvidia.com>
To: NBU-Contact-Thomas Monjalon <thomas@monjalon.net>,
	Cristian Dumitrescu <cristian.dumitrescu@intel.com>,
	Aaron Conole <aconole@redhat.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH 2/2] pipeline: autodetect endianness of action args
Date: Wed, 21 Apr 2021 07:49:39 +0000
Message-ID: <MWHPR12MB1472E652BD96C655CA1D0420DA479@MWHPR12MB1472.namprd12.prod.outlook.com> (raw)
In-Reply-To: <2003889.D9zfWNbQnx@thomas>

Hi,

> -----Original Message-----
> From: dev <dev-bounces@dpdk.org> On Behalf Of Thomas Monjalon
> Sent: Tuesday, April 20, 2021 10:58 PM
> To: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
> Cc: dev@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH 2/2] pipeline: autodetect endianness of
> action args
> 
> 12/04/2021 01:23, Cristian Dumitrescu:
> > Each table entry is made up of match fields and action data, with the
> > latter made up of the action ID and the action arguments. The approach
> > of having the user specify explicitly the endianness of the action
> > arguments is difficult to be picked up by P4 compilers, as the P4
> > compiler is generally unaware about this aspect.
> >
> > This commit introduces the auto-detection of the endianness of the
> > action arguments by examining the endianness of the their destination:
> > network byte order (NBO) when they get copied to headers and host byte
> > order (HBO) when they get copied to packet meta-data or mailboxes.
> >
> > The endianness specification of each action argument as part of the
> > rule specification, e.g. H(...) and N(...) is removed from the rule
> > file and auto-detected based on their destination. The DMA instruction
> > scope is made internal, so mov instructions need to be used. The
> > pattern of transferring complete headers from table entry action args
> > to headers is detected, and the associated set of mov instructions
> > plus header validate is internally detected and replaced with the
> > internal-only DMA instruction to preserve performance.
> >
> > Signed-off-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
> 
> Series applied, thanks
> 
> 

I believe this patchset is causing the build failures in https://bugs.dpdk.org/show_bug.cgi?id=683.

Regards,
Ali

  reply	other threads:[~2021-04-21  7:49 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-11 23:23 [dpdk-dev] [PATCH 1/2] pipeline: modularize the instruction optimizer Cristian Dumitrescu
2021-04-11 23:23 ` [dpdk-dev] [PATCH 2/2] pipeline: autodetect endianness of action args Cristian Dumitrescu
2021-04-20  0:48   ` Thomas Monjalon
2021-04-20 10:04     ` Dumitrescu, Cristian
2021-04-20 10:06       ` Thomas Monjalon
2021-04-20 10:20         ` Dumitrescu, Cristian
2021-04-20 14:48           ` Aaron Conole
2021-04-20 19:57   ` Thomas Monjalon
2021-04-21  7:49     ` Ali Alnubani [this message]
2021-04-21 12:57       ` Aaron Conole
2021-04-21 13:03         ` Ali Alnubani
2021-04-21 13:21           ` Aaron Conole
2021-04-21 13:58       ` Dumitrescu, Cristian
2021-04-21 14:24         ` Ali Alnubani
2021-04-21 15:10           ` Dumitrescu, Cristian

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