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Only Only Sky is a Sky is a limit, limit, So lets the real So lets the real job job start start ogrebenko, 10.08.2005 , 04.10.2005 & 12.10.2005
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Only Sky is a limit, So lets the real job start

Jan 05, 2016

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Only Sky is a limit, So lets the real job start. S. Pogrebenko, 10.08.2005 , 04.10.2005 & 12.10.2005. When Big Blue comes to play it plays BIG!. S. Pogrebenko, 10.08.2005 , 04.10.2005 & 12.10.2005. - PowerPoint PPT Presentation
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Page 1: Only Sky is a limit, So lets the real job start

OnlyOnly Sky is a limit,Sky is a limit,

So lets the real jobSo lets the real jobstartstart

S. Pogrebenko, 10.08.2005 , 04.10.2005 & 12.10.2005

Page 2: Only Sky is a limit, So lets the real job start

When Big Blue comes to playWhen Big Blue comes to play

it plays BIG!it plays BIG!

S. Pogrebenko, 10.08.2005 , 04.10.2005 & 12.10.2005

Page 3: Only Sky is a limit, So lets the real job start

Big Blue unveils Cell architectureBig Blue unveils Cell architecture

http://www-1.ibm.com/businesscenter/venturedevelopment/us/en/featurearticle/gcl_xmlid/8649/nav_id/emerginghttp://www-1.ibm.com/businesscenter/venturedevelopment/us/en/featurearticle/gcl_xmlid/8649/nav_id/emerging

• Just as the cells in a body unite to form complete physical systems, a "Cell" architecture will allow all kinds of electronic devices (from consumer products to supercomputers) to work together, signaling a new era in Internet entertainment, communications and collaboration.

• And Radio Astronomy too, I bet..

S. Pogrebenko, 10.08.2005 , 04.10.2005 & 12.10.2005

Page 4: Only Sky is a limit, So lets the real job start

http://www.blachford.info/computer/Cell/Cell0_v2.htmlhttp://www.blachford.info/computer/Cell/Cell0_v2.html

221 square mm 90 nm SOI,65 nm tech on the way,

4 GHz clock, 256 GFlops,And thermal take just 30 W

Oops..! 76.8 GBytes per second IO is equivalent of 600 Mk5s !More than the total amount of Mk5s on Earth !

But wait.. 256 GFlops ? That’s about 100 PCs? What it really means?

There is a lot of interesting things inside the CELL

S. Pogrebenko, 10.08.2005 , 04.10.2005 & 12.10.2005

Page 5: Only Sky is a limit, So lets the real job start

256 GFlops, be careful !256 GFlops, be careful !It’s not a Von Neumann machine.It’s not a Von Neumann machine.

But we don’t need to run Google But we don’t need to run Google search engine on it, neither such search engine on it, neither such

applications like Photoshop or applications like Photoshop or PowerPoint.PowerPoint.

Guess we have our own, Guess we have our own, Radio Astronomy related Radio Astronomy related

applications in mindapplications in mind

So, how it can do So, how it can do the job for us?the job for us?

S. Pogrebenko, 10.08.2005 , 04.10.2005 & 12.10.2005

Page 6: Only Sky is a limit, So lets the real job start

So, what we can get from all these So, what we can get from all these GFlops?GFlops?

• It takes 100-1000 ops/sample/station to make a beam former or SFX correlator (depending on required spectral resolution)

• One CELL with 256 GFlops can deliver as much as 16 station solution for a single 8-64 MHz wide channel

• 16 CELL board (the are rumors on the net that Big Blue

already has such boards) can host 16 stations 4 Gbps VLBI correlator or equivalent beam former solution

• Unless you would need a very computation demanding application:

S. Pogrebenko, 10.08.2005 , 04.10.2005 & 12.10.2005

Page 7: Only Sky is a limit, So lets the real job start

For such VLBI correlation like it was done for Huygens For such VLBI correlation like it was done for Huygens project it can take more than 100000 ops/sample/station,project it can take more than 100000 ops/sample/station,

JIVE’s experienceJIVE’s experience

Let’s check IO capacity then..S. Pogrebenko, 10.08.2005 , 04.10.2005 & 12.10.2005

Correlator

Station Units and DDU

MK5/MK4 UNITS

CCCDDD

EEE

T-Base 10/100/1000 LAN

LinuxCluster

Control and Visualisation Workstation

Celestial Model from CCC

Phase corrections from AIPS

Ephemerids and Navigation dataon Titan/Huygens from JPL

Channel data from MK5's

Unpack,Filter,Phase subtractPhase Fitting,Fringing

AIPScalibration and imaging

1 2 141516

Page 8: Only Sky is a limit, So lets the real job start

Aggregated IO bandwidthAggregated IO bandwidth

10-100 Tbps10-100 Tbpsthat’s from where a real fun startsthat’s from where a real fun starts

• Q : How to feed this beast? Any industry spec solution?

• A : Yes, just mount your remote telescope as another SCSI device, they call it iSAS.

• That’s just an exampleS. Pogrebenko, 10.08.2005 , 04.10.2005 & 12.10.2005

Page 9: Only Sky is a limit, So lets the real job start

iSAS – Serial Attached SCSI over TCP/IPiSAS – Serial Attached SCSI over TCP/IP

It’s HP, not Big Blue, but I heard on the net that BB has something similar in mind,And it can be NFS over Infiniband or GE,

Over 10G TCP/IP thought..

How much Gbps per logical unit per station would be enough?

S. Pogrebenko, 10.08.2005 , 04.10.2005 & 12.10.2005

Page 10: Only Sky is a limit, So lets the real job start

16 stations,16 stations,4 Gbps/station4 Gbps/station

VLBI solutionVLBI solution(space craft tracking enabled)(space craft tracking enabled)

or or baby-SKA beam formerbaby-SKA beam former

or or FPA descramblerFPA descrambler

((for just 1 kW thermalfor just 1 kW thermal))For more band width For more band width

consider the cooling first!consider the cooling first!

COMMUNICATION LOGIC

CELLCELLCELLCELL

CELLCELLCELLCELL

CELLCELLCELLCELL

CELLCELLCELLCELL

COMMUNICATION LOGIC

Single board, 16 CELLs,16 of 10G fiber connections

Performance is limited by the number of GFlops, not by IOS. Pogrebenko, 10.08.2005 , 04.10.2005 & 12.10.2005

Page 11: Only Sky is a limit, So lets the real job start

NGC : 64 Gbps per station, 1 Tbps totalNGC : 64 Gbps per station, 1 Tbps total can be fit into washing machine size box,can be fit into washing machine size box,

Dual solution can go to 2 Tbps throughput!Dual solution can go to 2 Tbps throughput!

It’ll just take about 1 Liter/second water flow to absorb 30 kW of thermal It’ll just take about 1 Liter/second water flow to absorb 30 kW of thermal power.power.

S. Pogrebenko, 10.08.2005 , 04.10.2005 & 12.10.2005

Page 12: Only Sky is a limit, So lets the real job start

• Two-Cells Prototype Board

Looks like a real prototype

Two big chips at the left side are CELL CPUs,Currently running at 2.8 GHz (not 4 GHz as by spec),And at 80 W of thermal take each (promised 30)

Two big chips at the left side are South BridgesFrom FlexIO to PCI-express to Infiniband (10 Gbps),

S. Pogrebenko, 10.08.2005 , 04.10.2005 & 12.10.2005

Page 13: Only Sky is a limit, So lets the real job start

And to make it really interesting !And to make it really interesting !

S. Pogrebenko, 10.08.2005 , 04.10.2005 & 12.10.2005

Page 14: Only Sky is a limit, So lets the real job start

More for baby-SKAMore for baby-SKA

• Yes, DL (KIDDY)

• + RT selfcal in voltage domain

• + Core to Core Correlator : DLSFX

Conclusion:

CELL processor seems to be a suitable platformfor next generation radio astronomy play stations

S. Pogrebenko, 10.08.2005 , 04.10.2005 & 12.10.2005

Page 15: Only Sky is a limit, So lets the real job start

S. Pogrebenko, 10.08.2005 , 04.10.2005 & 12.10.2005

Prototyping job done:

Broad band correlation on the ref source andUltra narrow band correlation on Huygens Now can run on the same HW/SW platform

Page 16: Only Sky is a limit, So lets the real job start

S. Pogrebenko, 10.08.2005 , 04.10.2005 & 12.10.2005

Only Sky is a limit,Only Sky is a limit,

So lets the real jobSo lets the real jobstartstart

Image Credit: NASA, ESA, B. Mobasher (Space Telescope Science Institute and the European Space Agency)