Messages in this thread | | | Subject | RE: [ofa-general] InfiniBand/iWARP/RDMA merge plans for 2.6.26 (what'sin infiniband.git) | Date | Wed, 2 Apr 2008 10:04:23 -0700 | From | "Scott Weitzenkamp (sweitzen)" <> |
| |
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 > >>> > >>> >
| |