Pi64: Raspberry Pi 2B 64 element bramble

[mvk]

The RPI2's have come in and I tested them right way. They were cheaper than expected, and perform much, much, much better as well! I also re-benchmarked Joost's old machine with an updated gcc 4.8, and looked at the difference between HT on and off. Results in the sheet below. The listed system prices includes power supplies, cabling and casing. Anything needed to run stand-alone. But it excludes power bars and switches, and that would add a bit for the RPI cluster variant, but not too much I suppose.



The RPI2 for is now on top for bulk performance (nodes/euro over 3 year operation). Wow, I never expected that. Only 16 chicken needed to beat 1 ox.

Peak performance is better on the intel, as should be.

I quickly checked if the PC can beat the rpi2 cluster at 2015 prices, but the same config sells for almost the same (~550 euro) here as one year ago, so that is a 'no'. It would be interesting to add a more modern intel.

[Joost Buijs]

The RPI2's have come in and I tested them right way. They were cheaper than expected, and perform much, much, much better as well! I also re-benchmarked Joost's old machine with an updated gcc 4.8, and looked at the difference between HT on and off. Results in the sheet below. The listed system prices includes power supplies, cabling and casing. Anything needed to run stand-alone. But it excludes power bars and switches, and that would add a bit for the RPI cluster variant, but not too much I suppose.



The RPI2 for is now on top for bulk performance (nodes/euro over 3 year operation). Wow, I never expected that. Only 16 chicken needed to beat 1 ox.

Peak performance is better on the intel, as should be.

I quickly checked if the PC can beat the rpi2 cluster at 2015 prices, but the same config sells for almost the same (~550 euro) here as one year ago, so that is a 'no'. It would be interesting to add a more modern intel.

If you wish we can run your test on my 5960X, 8 cores at 4GHz.
It even runs at 4.4 GHz. but I don't want to stretch things to much.
This is a Haswell processor 22 nm, the latest is Broadwell 14 nm.
The only requirement is to get your test program running under Windows because I don't want to install Linux on it for just one test. Another option is to use a live version of Linux or to run it in a VM, but that will hurt performance.