Perhaps this will help: http://www.lanl.gov/roadrunner/
And: http://www.lanl.gov/orgs/hpc/roadrunner/pdfs/Koch%20-%20Roadrunner%20Overvie w/RR%20Seminar%20-%20System%20Overview.pdf Pages 20 - 29 IANS, the triblade is really a quadblade, blade 1 is the Opteron Blade, blade 2 is a bridge, blades 3 and 4 are the Cell blades. Lots of other good stuff here: http://www.lanl.gov/orgs/hpc/roadrunner/rrseminars.shtml > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Bernard Li > Sent: Thursday, June 12, 2008 4:33 PM > To: [EMAIL PROTECTED] > Cc: Beowulf Mailing List > Subject: Re: [Beowulf] Roadrunner picture > > > Dear all: > > Thanks for all the responses. I was at the Roadrunner booth > at SC07. They had a handout explaining the Roadrunner > architecture which also has a picture of racks of blades > (maybe not of Roadrunner, but blades nevertheless). If I > remember correctly they even have the blades on display. > > John's ComputerWorld link also has some pictures of the blades. > > So I guess I was just really trying to figure out what nodes > those pictures are showing. Most likely the I/O nodes > although there is also the off-chance that they are just > random racks of servers ;-) > > Cheers, > > Bernard > > On Thu, Jun 12, 2008 at 2:05 PM, <[EMAIL PROTECTED]> wrote: > > All, > > > > Not a expert, but I know a thing or two. The triblade is two CB2 > > blades which each hold each two PowerXCell processors in a cc-NUMA > > arrangement. They sandwch a LS21 blade that is connected to each > > through a 16x PCIe to HT bridge. These three are uni-body > constructed. > > The CB2s resemble the QS22 blade that goes into the IBM > BladCenter H > > chassis. They are vertical full-height blades which fit 14 to an > > enclosure. The RoadRunner triblade is at least double-wide > > and maybe more. Do not know the measurements. > > > > The photo confuses me though, because am pretty sure these are > > vertically racked. Another thing to note is that programming the > > triblade is tri-binary ... x86, Power, > > and SPE. MPI processes are doled out to the Opteron blade. > The PowerXCells > > are programmed beneath MPI as SIMD accelrators. The > systems processing > > power is largely resident in the PowerXCell (~200 peak > Gflops per CB2), the > > Opteron only accounts for about 44 teraflops of the total > peak performance > > with is > > in the vicinity of 1400 teraflops. Linpack runs at about > 85% efficient on > > the system > > and is running on the SPE only I am pretty sure. Running Linpack it > > generates 650 > > Mflops per watt making it pretty Green I guess ... which is > what you would > > expect > > from a DLP engine. As I recall Blue Gene is about 350 > Mflops per watt. But > > the > > 650 number maybe does not count the LS21 power consumption. > Anyway ... > > > > Hope that was useful ... now, can someone tell about the > IEEE-754-ness > > of its eDP units? > > > > rbw > > -- > > > > "Making predictions is hard, especially about the future." > > > > Niels Bohr > > > > -- > > > > Richard Walsh > > Thrashing River Consulting-- > > 5605 Alameda St. > > Shoreview, MN 55126 > > > > Phone #: 612-382-4620 > > > > > > -------------- Original message -------------- > > From: "Peter St. John" <[EMAIL PROTECTED]> > > Bernard, > > > > I'm looking forward to hearing from our resident experts, but > > meanwhile: http://en.wikipedia.org/wiki/IBM_Roadrunner exlains the > > architecture some. The buzzword is "triblade", which is 3 blades > > (with an > > extension) employing two types of processors (AMD Opteron > and IBM Cell) in > > a hybrid subsystem. I have no idea what a single Triblade > looks like. The > > overallmachine is then composed of zillions of triblades. > > Wow,imagine a Beowulf of those (jk :-) > > > > Peter (designing a Beowulf of abaci to fit his current budget) > > > > On Thu, Jun 12, 2008 at 3:45 PM, Bernard Li <[EMAIL PROTECTED]> > > wrote: > >> > >> Hi all: > >> > >> I am sure most people have seen the following picture for > Roadrunner > >> circulating the Net: > >> > >> > >> > http://www.cnn.com/2008/TECH/06/09/fastest.computer.ap/index.html?ire > >> f=newssearch > >> > >> However, they don't look likes blades to me, more like 2U IBM x > >> series servers. Perhaps those are the I/O nodes? > >> > >> Cheers, > >> > >> Bernard > >> _______________________________________________ > >> Beowulf mailing list, Beowulf@beowulf.org > >> To change your subscription (digest mode or unsubscribe) visit > >> http://www.beowulf.org/mailman/listinfo/beowulf > > > > > > > > ---------- Forwarded message ---------- > > From: "Peter St. John" <[EMAIL PROTECTED]> > > To: "Bernard Li" <[EMAIL PROTECTED]> > > Date: Thu, 12 Jun 2008 20:16:19 +0000 > > Subject: Re: [Beowulf] Roadrunner picture > > _______________________________________________ > > Beowulf mailing list, Beowulf@beowulf.org > > To change your subscription (digest mode or unsubscribe) visit > > http://www.beowulf.org/mailman/listinfo/beowulf > > > > _______________________________________________ > > Beowulf mailing list, Beowulf@beowulf.org > > To change your subscription (digest mode or unsubscribe) visit > > http://www.beowulf.org/mailman/listinfo/beowulf > > > > > _______________________________________________ > Beowulf mailing list, Beowulf@beowulf.org > To change your subscription (digest mode or unsubscribe) > visit http://www.beowulf.org/mailman/listinfo/beowulf _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
