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SubjectRE: [ofa-general] InfiniBand/iWARP/RDMA merge plans for 2.6.26 (what'sin infiniband.git)
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I'd like to see netperf comparisions of UDP_STREAM/UDP_RR vs
RDS_STREAM/RDS_RR, does anyone have a patch that will apply cleanly to a
recent netperf?

Scott Weitzenkamp
SQA and Release Manager
Data Center Access Engineering
Cisco Systems




> -----Original Message-----
> From: Richard Frank [mailto:richard.frank@oracle.com]
> Sent: Wednesday, April 02, 2008 11:00 AM
> To: Scott Weitzenkamp (sweitzen)
> Cc: Roland Dreier (rdreier); rds-devel@oss.oracle.com;
> linux-kernel@vger.kernel.org; general@lists.openfabrics.org
> Subject: Re: [ofa-general] InfiniBand/iWARP/RDMA merge plans
> for 2.6.26 (what'sin infiniband.git)
>
> OK - and the conversation was about using NetPerf to compare
> performance
> of RDS to UDP relative to suitability for Oracle use ... so I think
> those statements still illustrate my points...
>
> 1) NetPerf does not do what Oracle does - and hence is not
> useful from
> Oracle's perspective in comparing ULPs.
> 2) For some metrics - it's not valid to compare a
> non-reliable IPC to a
> reliable IPC - it's not an apples to apples comparison.
> Especially when
> the app is considered and what the app must do to use UDP vs RDS.
>
> I did not say that NetPerf should not be extended to support
> RDS - just
> that using it to do a comparison of ULPs to determine how well Oracle
> would run - is not what we (Oracle) would want - at least that was my
> intention..
>
> Scott Weitzenkamp (sweitzen) wrote:
> > Rich,
> >
> > On Nov 1, 2007, you wrote this to rds-devel:
> >
> > "Netperf is too simplistic in that all it seems to do is
> stream data
> > in a
> > simple loop. This is not how Oracle uses the IPC and
> again does not
> > reflect what it would take to make UDP reliable.
> >
> > For this reason we are not interested in having Netperf
> support RDS
> > and
> > or seeing Netperf data."
> >
> > I would like to see RDS supported by existing common tools
> like netperf,
> > iperf, etc. so we can easily compare how RDS performs to UDP for IPC
> > models other than Oracle.
> >
> > Scott Weitzenkamp
> > SQA and Release Manager
> > Data Center Access Engineering
> > Cisco Systems
> >
> >
> >
> >
> >
> >> -----Original Message-----
> >> From: Richard Frank [mailto:richard.frank@oracle.com]
> >> Sent: Wednesday, April 02, 2008 10:38 AM
> >> To: Scott Weitzenkamp (sweitzen)
> >> Cc: Roland Dreier (rdreier); rds-devel@oss.oracle.com;
> >> linux-kernel@vger.kernel.org; general@lists.openfabrics.org
> >> Subject: Re: [ofa-general] InfiniBand/iWARP/RDMA merge plans
> >> for 2.6.26 (what'sin infiniband.git)
> >>
> >> I believe there is a patch for NetPerf which supports RDS -
> >> although it
> >> may need to be updated - and submitted.
> >>
> >> The only prior discussion I can think of - was whether or
> not NetPerf
> >> exercises RDS as Oracle would.
> >>
> >> I'm not proposing that we should enhance NetPerf to do that
> >> (but that's
> >> OK with me).
> >>
> >> We created a tool rds-stress which does that.
> >>
> >> Scott Weitzenkamp (sweitzen) wrote:
> >>
> >>>> WRT to merging RDS into the kernel - our current plans are
> >>>>
> >> to wait to
> >>
> >>>> see RDS adopted by more than Oracle - before approaching
> >>>>
> >> the kernel
> >>
> >>>> community about inclusion of RDS.
> >>>>
> >>>>
> >>> I've seen statements before from someone from Oracle that
> >>>
> >> RDS was only
> >>
> >>> for Oracle's use, for example, that person did not want
> >>>
> >> netperf changed
> >>
> >>> to support RDS.
> >>>
> >>> Scott Weitzenkamp
> >>> SQA and Release Manager
> >>> Data Center Access Engineering
> >>> Cisco Systems
> >>>
> >>>
>


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