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From: Jerin Jacob <jerinjacobk@gmail.com>
To: Thomas Monjalon <thomas@monjalon.net>
Cc: "Ananyev, Konstantin" <konstantin.ananyev@intel.com>,
	Jerin Jacob <jerinj@marvell.com>,  dpdk-dev <dev@dpdk.org>,
	Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>,
	Gavin Hu <gavin.hu@arm.com>
Subject: Re: [dpdk-dev] [PATCH 0/8] eBPF arm64 JIT support
Date: Tue, 8 Oct 2019 12:27:56 +0530	[thread overview]
Message-ID: <CALBAE1OkG197d0DGFvZMdGZDRKBVbdFT+e5C9ZJ21b6ZNLNs9g@mail.gmail.com> (raw)
In-Reply-To: <4393352.hqBF0BEQvh@xps>

On Tue, 8 Oct, 2019, 1:45 AM Thomas Monjalon, <thomas@monjalon.net> wrote:

> 07/10/2019 21:29, Jerin Jacob:
> > On Mon, 7 Oct, 2019, 11:35 PM Thomas Monjalon, <thomas@monjalon.net>
> wrote:
> [...]
> > let's restart from the beginning by answering simple questions:
> > > - what are the use cases of BPF in DPDK?
> >
> > If something needs to be dynamically controlled then eBPF can be used,
> > couple of use cases
> >
> > # packet filtering
> > # debugging
> > # function call tracing
> > # There are some Lua JIT based dataplane implementations. Which can be
> > replaced with eBPF with JIT.
> >
> > - how much we'll benefit from sharing code with Linux?
> >
> > I have mentioned some of the performance constraint in the other thread.
> > Moreover I don't believe it is not easy task for Linux eBPF to run as
> > userspace and I not sure who is going to do that
>
> I was asking the benefits here:
> - sharing optimizations in both projects
>

Yes. But even if it is different code base it is possible to share the
optimization.

- get verifier support
>

Verifier support already available in the library.

What else?
>

I see only avoiding code duplication and getting new feature like cBPF.


> > - what can we lose in a single JIT implementation?
> >
> > Sorry, I didn't understood this question?
>
> I mean what are the drawbacks of using a Linux implementation?
> How performance constraints are differents, etc?
>

Mention the details in the below thread. Waiting for feedback from Kernel
maintainer.

http://mails.dpdk.org/archives/dev/2019-October/146004.html

http://mails.dpdk.org/archives/dev/2019-October/146063.html


>
>
> Note: as a lot of people, I don't really know BPF,
> so these are real questions to help understanding the challenge.


>
>

      reply	other threads:[~2019-10-08  6:58 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-03 10:59 [dpdk-dev] [PATCH 0/8] eBPF arm64 JIT support jerinj
2019-09-03 10:59 ` [dpdk-dev] [PATCH 1/8] bpf/arm64: add build infrastructure jerinj
2019-09-03 10:59 ` [dpdk-dev] [PATCH 2/8] bpf/arm64: add prologue and epilogue jerinj
2019-09-03 10:59 ` [dpdk-dev] [PATCH 3/8] bpf/arm64: add basic arithmetic operations jerinj
2019-09-03 10:59 ` [dpdk-dev] [PATCH 4/8] bpf/arm64: add logical operations jerinj
2019-09-03 10:59 ` [dpdk-dev] [PATCH 5/8] bpf/arm64: add byte swap operations jerinj
2019-09-03 10:59 ` [dpdk-dev] [PATCH 6/8] bpf/arm64: add load and store operations jerinj
2019-09-03 10:59 ` [dpdk-dev] [PATCH 7/8] bpf/arm64: add atomic-exchange-and-add operation jerinj
2019-10-18 13:16   ` David Marchand
2019-09-03 10:59 ` [dpdk-dev] [PATCH 8/8] bpf/arm64: add branch operation jerinj
2019-09-24 17:03 ` [dpdk-dev] [PATCH 0/8] eBPF arm64 JIT support Ananyev, Konstantin
2019-10-12 12:22   ` Thomas Monjalon
2019-10-03 12:51 ` Thomas Monjalon
2019-10-03 13:07   ` Jerin Jacob
2019-10-03 15:05     ` Ananyev, Konstantin
2019-10-04  4:55       ` Honnappa Nagarahalli
2019-10-04  9:54         ` Steve Capper
2019-10-04 10:53           ` Thomas Monjalon
2019-10-04 14:09             ` Daniel Borkmann
2019-10-04 14:43               ` Jerin Jacob
2019-10-05  0:00                 ` Daniel Borkmann
2019-10-05 14:39                   ` Jerin Jacob
2019-10-07 11:57                     ` Ananyev, Konstantin
2019-10-24  4:22                     ` Jerin Jacob
2020-04-06 11:05                 ` Ananyev, Konstantin
2019-10-04 15:39       ` Jerin Jacob
2019-10-07 12:33         ` Thomas Monjalon
2019-10-07 13:00           ` Jerin Jacob
2019-10-07 18:04             ` Thomas Monjalon
2019-10-07 19:29               ` Jerin Jacob
2019-10-07 20:15                 ` Thomas Monjalon
2019-10-08  6:57                   ` Jerin Jacob [this message]

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