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A Cheap 12-Core, 30-Watt Ubuntu Cluster

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21–30 of 35 posts

Re: A Cheap 12-Core, 30-Watt Ubuntu Cluster

#21
Ah, I like the general idea, but why bother with a cluster of ARM for 12 cores? You can get a 12 core AMD in one machine.

Or if you want really low power usage, there is this http://www.tilera.com/sites/default/files/productbriefs/Tile... with 36 cores on one chip (of course that's not especially cheap).

This doesn't seem like a very useful example.

Re: A Cheap 12-Core, 30-Watt Ubuntu Cluster

#23
post #10

For comparison, you can now get http://ark.intel.com/products/65703/Intel-Core-i5-3470T-Proc... http://ark.intel.com/products/65735 http://ark.intel.com/products/65714/Intel-Core-i7-3517U-Proc...

the wattage measured here is not just the processor, its also the entire boards. Ive done some benchmarks testing Intel Atom processors Atom330's and D525's against Tegra3 processors. On average the Terga3 processors outperformed the Atoms 4x-8x in Flop/s per Watt. Admittedly that is not the only important metric, but gives an initial performance comparison between ARM and x86 performance

That being said, the Atoms themselves are nor a good benchmark in performance / Watt. I'd rather be interested in a comparison vs. current gen. xeon or interlagos systems. Sounds silly, but ARM has been making progress and I could see them being used in the future as companions to GPUs in computing clusters. With current GPGPU computing models like OpenACC it does not really make sense to put 16 race horses (Interlagos) besides an ant colony (Fermi GPU), except if you head for high flexibility.

Re: A Cheap 12-Core, 30-Watt Ubuntu Cluster

#25
post #21

Ah, I like the general idea, but why bother with a cluster of ARM for 12 cores? You can get a 12 core AMD in one machine. Or if you want really low power usage, there is this http://www.tilera.com/sites/default/files/productbriefs/Tile... with 36 cores on one chip (of course that's not especially cheap). This doesn't seem like a very useful example.

yeah this 12 core cluster costs about $2,000 for 12 Panda boards.

Re: A Cheap 12-Core, 30-Watt Ubuntu Cluster

#27
post #21

Ah, I like the general idea, but why bother with a cluster of ARM for 12 cores? You can get a 12 core AMD in one machine. Or if you want really low power usage, there is this http://www.tilera.com/sites/default/files/productbriefs/Tile... with 36 cores on one chip (of course that's not especially cheap). This doesn't seem like a very useful example.

That AMD chip would have a lot higher power consumption, though, probably 10x as much.

Re: A Cheap 12-Core, 30-Watt Ubuntu Cluster

#28
post #21

Ah, I like the general idea, but why bother with a cluster of ARM for 12 cores? You can get a 12 core AMD in one machine. Or if you want really low power usage, there is this http://www.tilera.com/sites/default/files/productbriefs/Tile... with 36 cores on one chip (of course that's not especially cheap). This doesn't seem like a very useful example.

yeah this 12 core cluster costs about $2,000 for 12 Panda boards.

I may be wrong, but I think the PandBoards are not really meant to be put in servers (they are meant as development boards, right?), and they are significantly more expensive than if you'd buy a 12 core ARM cluster specifically meant to be used as a server.

Re: A Cheap 12-Core, 30-Watt Ubuntu Cluster

#29
post #23
post #10

Earlier quoted context omitted.

the wattage measured here is not just the processor, its also the entire boards. Ive done some benchmarks testing Intel Atom processors Atom330's and D525's against Tegra3 processors. On average the Terga3 processors outperformed the Atoms 4x-8x in Flop/s per Watt. Admittedly that is not the only important metric, but gives an initial performance comparison between ARM and x86 performance

That being said, the Atoms themselves are nor a good benchmark in performance / Watt. I'd rather be interested in a comparison vs. current gen. xeon or interlagos systems. Sounds silly, but ARM has been making progress and I could see them being used in the future as companions to GPUs in computing clusters. With current GPGPU computing models like OpenACC it does not really make sense to put 16 race horses (Interlag…

Well, I think Intel wants Atom to compete with ARM for that market, so it may be relevant.

There's also Nvidia's Project Denver, which will probably come out in 2014. It's based on the 64 bit ARMv8 architecture, it's a custom CPU made in collaboration with ARM, and I think they want to pair it with their next-gen GPU architecture Maxwell. It's intended for servers and supercomputers.

Re: A Cheap 12-Core, 30-Watt Ubuntu Cluster

#30
post #13
post #11

Earlier quoted context omitted.

Six dual-core PandaBoard ES boards stuck in a wooden dish-drying rack :) One of these draws a max of 5-6 watts under heavy load, so the whole "rack" should stay around 30 watts during cluster benchmarking etc. It's not completely assembled yet so there are no real numbers. Total cost about $1500.

I was seriously considering trying something like this with either the Raspberry Pi or the APC " rel="nofollow">http://apc.io/> . It looks like one PandaBoard can roughly match the CPU horsepower of four APC boards at a slightly lower price, so that's good to know. The Raspberry Pi might still beat out the PandaBoard in terms of purchase cost-to-Megahertz ratio. We'll see. :-)

Don't just look at MHz/$. The Raspberry Pi has a ARM v6 compatible core vs the PandaBoard which has a v7-A core, i.e., Raspberry Pi MHz < PandaBoard MHz.
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