[dpdk-dev] [PATCH] compressdev: add feature flag to specify where processing is done

Luse, Paul E paul.e.luse at intel.com
Tue Dec 18 19:41:07 CET 2018


Resend wrong subject

-----Original Message-----
From: Trahe, Fiona
Sent: Tuesday, December 18, 2018 7:43 AM
To: Stephen Hemminger <stephen at networkplumber.org>
Cc: dev at dpdk.org; akhil.goyal at nxp.com; Jozwiak, TomaszX <tomaszx.jozwiak at intel.com>; shally.verma at caviumnetworks.com; ashish.gupta at caviumnetworks.com; Daly, Lee <lee.daly at intel.com>; Luse, Paul E <paul.e.luse at intel.com>; Trahe, Fiona <fiona.trahe at intel.com>
Subject: RE: [dpdk-dev] [PATCH] compressdev: add feature flag to specify where processing is done

Hi Stephen

//snip//
> > > Subject: Re: [dpdk-dev] [PATCH] compressdev: add feature flag to 
> > > specify where processing is done
> > >
> > > On Tue, 20 Nov 2018 01:39:48 +0000 Fiona Trahe 
> > > <fiona.trahe at intel.com> wrote:
> > >
> > > > A new device feature flag, RTE_COMPDEV_FF_SW_OP_DONE_IN_DEQUEUE
> > > > is added. A PMD which processes operations using a software 
> > > > acceleration engine should set this if the bulk of the 
> > > > processing is done during the dequeue. It should leave it 
> > > > cleared if the bulk of the processing is done during the enqueue 
> > > > (default).
> > > > An application may find this useful for tuning.
> > > >
> > > > Signed-off-by: Fiona Trahe <fiona.trahe at intel.com>
> > >
> > > What application? or is this "if we build it they will come?"
> > [Fiona] Our storage team asked for this, so not quite.
> > Seems like it might by generically useful, so a bit of the latter 
> > too :) Would you prefer I removed that line?
> 
> Hopefully, there would be one or more open source projects using the API.
> I just did a survey of DPDK an 1/3 of it is never used by any open 
> source project.  Hate to see more dead code and special cases created.
> 
> At least, some example code in examples would help. Something like a 
> simple in memory compressed storage server using a network API 
> (SMB?/SSH?/FTP?)
[Fiona] There is no compressdev sample app yet. 
However I've double-checked with the SPDK team, they're currently integrating compressdev and intend to push a patch to SPDK - a storage open-source project - using this flag.

Acked-by: Paul Luse <paul.e.luse at intel.com>


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