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From: Ray Kinsella <mdr@ashroe.eu>
To: "Burakov, Anatoly" <anatoly.burakov@intel.com>,
	Thomas Monjalon <thomas@monjalon.net>
Cc: techboard@dpdk.org, Bruce Richardson <bruce.richardson@intel.com>,
	dev@dpdk.org, Kevin Traynor <ktraynor@redhat.com>
Subject: Re: [dpdk-dev] [dpdk-techboard]  DPDK ABI/API Stability
Date: Tue, 9 Apr 2019 10:42:24 +0100	[thread overview]
Message-ID: <473d32c5-d10e-af49-7140-b1e3bf010831@ashroe.eu> (raw)
Message-ID: <20190409094224.kKM56c1vO59GNCoA0igOFccDoymBZMshLkFjV8W9Gt8@z> (raw)
In-Reply-To: <6a9bf695-b287-9e5e-358c-d6c3f93db045@intel.com>



On 08/04/2019 14:38, Burakov, Anatoly wrote:
> On 08-Apr-19 2:00 PM, Ray Kinsella wrote:
>>
>>
>> On 08/04/2019 11:15, Burakov, Anatoly wrote:
>>> On 08-Apr-19 10:04 AM, Ray Kinsella wrote:
>>>> On 07/04/2019 10:48, Thomas Monjalon wrote:
>>>>> 04/04/2019 16:07, Burakov, Anatoly:
>>>>>> On 04-Apr-19 1:52 PM, Ray Kinsella wrote:
>>>>>>> On 04/04/2019 11:54, Bruce Richardson wrote:
>>>>>>>> On Thu, Apr 04, 2019 at 10:29:19AM +0100, Burakov, Anatoly wrote:
>>>>>>>>> On 03-Apr-19 4:42 PM, Ray Kinsella wrote:
>>>> [SNIP]
>> [SNIP]
[SNIP]
>>
> 
> Perhaps i didn't phrase myself well enough. When i say "DPDK 1.0
> specification" i don't mean there literally should be a document with a
> formal specification :)

When I hear the word specification I think encyclopedia-like stacks of
paper.

> 
> Rather, i'm thinking more along the lines of, let's take a look at what
> we have, and think of ways we can reduce the amount of code and improve
> things without causing major inconveniences to great majority of users.
> As in, if we want to "break once more and then never again", then maybe
> instead of small incremental fixes here and there, we could actually do
> a more drastic change that keeps perhaps 90% users happy instead of
> 100%, but which reduces maintenance/validation effort from 100% down to
> 30%.

Agreed - all I would propose on top of this is that we give ourselves a
real deadline.

The DPDK API has been iterating since 2012 and while we can spare a few
more months to do tidy-up and get it right, we _do_ need to draw a line
in the sand at the same time.

> 
> As a concrete proposal, my number one dream would be to see multiprocess
> gone. I also recall desire for "DPDK to be more lightweight", and i
> maintain that DPDK *cannot* be lightweight if we are to support
> multiprocess - we can have one or the other, but not both. However,
> realistically, i don't think dropping multiprocess is ever going to
> happen - not only it is too entrenched in DPDK use cases, it is actually
> quite useful despite its flaws.
> 
> However, what *could* be realistic is to trim down complexity in EAL
> init and system code in general - to me (again, a concrete proposal!),
> that would be dropping igb_uio and supporting upstream kernel modules
> only (VFIO, maybe uio_pci_generic if we're pushing it?), dropping 32-bit
> support and legacy mem modes, and perhaps bumping kernel version and
> removing some compatibility code as well. This would remove potentially
> thousands of lines of code and keep EAL cleaner and more maintainable:
> right now, we have two different hotplug mechanisms (UIO and VFIO), lots
> of different memory/interrupt modes, etc., for no reason that is readily
> apparent to me.
> 
> So, as you can see, an effort to review and delineate what we want to
> support would be necessary if we want to ease the maintenance burden for
> either myself or anyone that inherits this code, as well as reducing the
> number of moving parts and, as a consequence, validation effort and
> amount of bugs. We can't simply do it in a random release "just
> because", but if we were to "break once more and then never again",
> perhaps this is something that could be considered.
> 

  parent reply	other threads:[~2019-04-09  9:42 UTC|newest]

Thread overview: 78+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-03 15:42 [dpdk-dev] " Ray Kinsella
2019-04-03 15:42 ` Ray Kinsella
2019-04-03 19:53 ` Luca Boccassi
2019-04-03 19:53   ` Luca Boccassi
2019-04-04  9:29 ` Burakov, Anatoly
2019-04-04  9:29   ` Burakov, Anatoly
2019-04-04 10:54   ` [dpdk-dev] [dpdk-techboard] " Bruce Richardson
2019-04-04 10:54     ` Bruce Richardson
2019-04-04 12:02     ` Luca Boccassi
2019-04-04 12:02       ` Luca Boccassi
2019-04-04 13:05       ` Ray Kinsella
2019-04-04 13:05         ` Ray Kinsella
2019-04-04 13:10         ` Bruce Richardson
2019-04-04 13:10           ` Bruce Richardson
2019-04-05 13:25           ` Ray Kinsella
2019-04-05 13:25             ` Ray Kinsella
2019-04-07  9:37             ` Thomas Monjalon
2019-04-07  9:37               ` Thomas Monjalon
2019-04-04 13:21         ` Luca Boccassi
2019-04-04 13:21           ` Luca Boccassi
2019-04-04 12:52     ` Ray Kinsella
2019-04-04 12:52       ` Ray Kinsella
2019-04-04 14:07       ` Burakov, Anatoly
2019-04-04 14:07         ` Burakov, Anatoly
2019-04-07  9:48         ` Thomas Monjalon
2019-04-07  9:48           ` Thomas Monjalon
2019-04-08  9:04           ` Ray Kinsella
2019-04-08  9:04             ` Ray Kinsella
2019-04-08 10:15             ` Burakov, Anatoly
2019-04-08 10:15               ` Burakov, Anatoly
2019-04-08 13:00               ` Ray Kinsella
2019-04-08 13:00                 ` Ray Kinsella
2019-04-08 13:38                 ` Burakov, Anatoly
2019-04-08 13:38                   ` Burakov, Anatoly
2019-04-08 13:58                   ` David Marchand
2019-04-08 13:58                     ` David Marchand
2019-04-08 14:02                     ` Burakov, Anatoly
2019-04-08 14:02                       ` Burakov, Anatoly
2019-04-08 14:38                       ` David Marchand
2019-04-08 14:38                         ` David Marchand
2019-04-08 15:13                         ` Stephen Hemminger
2019-04-08 15:13                           ` Stephen Hemminger
2019-04-08 15:49                         ` Burakov, Anatoly
2019-04-08 15:49                           ` Burakov, Anatoly
2019-04-10  8:35                           ` David Marchand
2019-04-10  8:35                             ` David Marchand
2019-04-08 15:50                         ` Burakov, Anatoly
2019-04-08 15:50                           ` Burakov, Anatoly
2019-04-09  9:42                   ` Ray Kinsella [this message]
2019-04-09  9:42                     ` Ray Kinsella
2019-04-14  0:42             ` Neil Horman
2019-04-14  0:42               ` Neil Horman
2019-04-15  9:10               ` Bruce Richardson
2019-04-15  9:10                 ` Bruce Richardson
2019-04-04 15:51     ` Stephen Hemminger
2019-04-04 15:51       ` Stephen Hemminger
2019-04-04 16:37       ` Burakov, Anatoly
2019-04-04 16:37         ` Burakov, Anatoly
2019-04-04 16:56     ` Kevin Traynor
2019-04-04 16:56       ` Kevin Traynor
2019-04-04 19:08       ` Wiles, Keith
2019-04-04 19:08         ` Wiles, Keith
2019-04-04 20:13         ` Kevin Traynor
2019-04-04 20:13           ` Kevin Traynor
2019-04-05 13:30           ` Ray Kinsella
2019-04-05 13:30             ` Ray Kinsella
2019-04-05 13:29         ` Ray Kinsella
2019-04-05 13:29           ` Ray Kinsella
2019-04-04  9:47 ` [dpdk-dev] " Kevin Traynor
2019-04-04  9:47   ` Kevin Traynor
2019-04-04 13:16   ` Ray Kinsella
2019-04-04 13:16     ` Ray Kinsella
2019-04-10  5:14 ` Honnappa Nagarahalli
2019-04-10  5:14   ` Honnappa Nagarahalli
2019-04-10  9:03   ` [dpdk-dev] [dpdk-techboard] " Bruce Richardson
2019-04-10  9:03     ` Bruce Richardson
2019-04-10  9:43   ` [dpdk-dev] " Luca Boccassi
2019-04-10  9:43     ` Luca Boccassi

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