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From: Stephen Hemminger <stephen@networkplumber.org>
To: David Marchand <david.marchand@redhat.com>
Cc: Haiyue Wang <haiyue.wang@intel.com>, dev <dev@dpdk.org>
Subject: Re: [dpdk-dev] [RFC v1 0/3] show the Rx/Tx burst description field
Date: Mon, 12 Aug 2019 08:38:23 -0700
Message-ID: <20190812083823.72e7c2a9@hermes.lan> (raw)
In-Reply-To: <CAJFAV8zFd5jMAtocx9K-ds6khWkTbS-K1_Qi5jQf4+W1dsOLAQ@mail.gmail.com>

On Mon, 12 Aug 2019 16:27:11 +0200
David Marchand <david.marchand@redhat.com> wrote:

> On Mon, Aug 12, 2019 at 4:20 PM Haiyue Wang <haiyue.wang@intel.com> wrote:
> >
> > Since some PMDs have multi-path for Rx/Tx, FD.io VPP will tell you in
> > the Debug CLI what rx/tx function is being used:
> >         #show hardware-interface
> >
> >          tx burst function: ice_xmit_pkts
> >          rx burst function: ice_recv_scattered_pkts
> >
> > But if the tx/rx is static, then 'dladdr' will return nil:
> >
> >          tx burst function: (nil) │······················
> >          rx burst function: (nil) │······················
> >
> > For making things consistent and gracefull, we introduce an new string
> > field to describe the Rx/Tx burst information. This is vendor-neutral,
> > it is used to identify the Rx/Tx burst selection if the PMD has more
> > than one.
> >
> > If a PMD supports this, then rxqinfo/txqinfo->burst_info[0] != '\0'.  
> 
> The rx/tx handlers are the same for all queues of a ethdev port.
> What is the added value to put this in a per queue api ?

With some symbol table lookup tools it is possible to do introspection
to find the symbol from the function pointer. Without breaking API/ABI.

  reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-12 14:15 Haiyue Wang
2019-08-12 14:15 ` [dpdk-dev] [RFC v1 1/3] ethdev: add the Rx/Tx burst description field in queue information Haiyue Wang
2019-08-12 15:37   ` Stephen Hemminger
2019-08-12 14:15 ` [dpdk-dev] [RFC v1 2/3] testpmd: show the Rx/Tx burst description field in queue Haiyue Wang
2019-08-12 14:15 ` [dpdk-dev] [RFC v1 3/3] net/ice: support the Rx/Tx burst description field in queue information Haiyue Wang
2019-08-12 14:27 ` [dpdk-dev] [RFC v1 0/3] show the Rx/Tx burst description field David Marchand
2019-08-12 15:38   ` Stephen Hemminger [this message]
2019-08-12 15:42     ` Wang, Haiyue
2019-08-12 15:54       ` Stephen Hemminger
2019-08-12 16:00         ` Wang, Haiyue
2019-08-12 17:28           ` Stephen Hemminger
2019-08-12 17:36             ` Wang, Haiyue
2019-08-12 15:39   ` Wang, Haiyue

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