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DerekL
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Message 352 - Posted: 28 Dec 2014, 21:48:18 UTC
Last modified: 28 Dec 2014, 21:50:41 UTC

Mmmmm, pie, delicious... Oh wait, wrong kind of pie :)

I was wondering if there is any support for the Raspberry Pi ARM processors. I have a whole army of RPi's with nothing to do. Seems to me that many of these shorter work units would be very well suited to these small processors.

I understand that many projects do not support RPi's, often because the work units are just too much to handle. Maybe it is worth considering for this one?? There are millions of RPi's out there and I'm sure that many of them could end up crunching if only projects supported them and had small enough work units where it didn't take half a lifetime to complete.

Food for thought

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Message 353 - Posted: 28 Dec 2014, 23:23:06 UTC

There is no LLR version for ARM.

frankhagen
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Message 378 - Posted: 30 Dec 2014, 18:46:02 UTC - in response to Message 353.

There is no LLR version for ARM.


well, the rat pack just voluntered to provide one - did they?

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Message 379 - Posted: 30 Dec 2014, 18:51:24 UTC - in response to Message 353.

There is no LLR version for ARM.


This would take too long.

DerekL
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Message 381 - Posted: 30 Dec 2014, 19:04:33 UTC

Lol. The rat pack has lots of them(or at least I do). But rebirther is correct; they are very slow :( I was just hoping to get lucky and find a good use for them other than attracting dust.

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Message 385 - Posted: 30 Dec 2014, 19:45:59 UTC - in response to Message 381.

Lol. The rat pack has lots of them(or at least I do). But rebirther is correct; they are very slow :( I was just hoping to get lucky and find a good use for them other than attracting dust.


nice side step!

thought you would come up with an llr-app for arm hardware.

i bet you know what ARM stands for and why...

DerekL
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Message 387 - Posted: 30 Dec 2014, 19:55:28 UTC

Do enlighten me....

frankhagen
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Message 388 - Posted: 30 Dec 2014, 20:12:31 UTC - in response to Message 387.

Do enlighten me....


finish prescool, learn just a little bit about processor architectures and you will figure out with no problem why LLR on ARM is just - well - not that bright of an idea.

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Message 391 - Posted: 31 Dec 2014, 4:43:44 UTC - in response to Message 388.

Do enlighten me....


finish prescool, learn just a little bit about processor architectures and you will figure out with no problem why LLR on ARM is just - well - not that bright of an idea.


Frank,

I've seen your type on Mersenne before, and so have others on this project; assholes aren't tolerated for long. You made a smart ass comment regarding a good faith question that I made in a different msg thread re: work unit times, and now your just being a dick to one of my teammates who asked a good faith question in order to utilize equipment that he has in order to benefit this project.

I don't know jack shit about mathematics; I got an "A" in college algebra, and that's about it. But I am really really fascinated with the science behind PrimeGrid and SRBase. I think this project KICKS ASS. All my questions, and FURTHERMORE, AND FOR YOUR INFORMATION, NOW AND IN THE FUTURE, any question by anyone of my teammates, IS FOR THE SOLE BENEFIT OF FURTHERING THE GOALS OF THIS PROJECT. Don't ever mistake it. There's a reason why the processing power behind this project tripled in the last three days, or work now runs out in mere hours. Surely you're smart enough to figure that out. P/M Rebirther if you need further explanation.

AtP brings it hard, whether it be crunching workunits, or developing all the SOFTWARE BEHIND crunching the workunits. Are you aware of that? Go ahead and run your mouth now... better yet, go dust off your systems from 1990.


IF YOU ARE NOT DOWN FOR THE CAUSE, GET OFF THIS PROJECT.

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Message 393 - Posted: 31 Dec 2014, 9:11:40 UTC - in response to Message 391.

first you show up wining about "large" deadlines.
the next bright idea you bring up is suggesting to run FFT-math on 400Mhz 32bit INTEGER cores.


funny fraggles indeed you are...

mattozan
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Message 401 - Posted: 31 Dec 2014, 16:57:44 UTC

So I don't really know, but I'll hazard a guess? Is it because the "R" in "ARM" stands for "RISC," which stands for Reduced Instruction Set Computing? Maybe these processors don't have the instructions needed for efficiently computing Fast Fourier Transforms?

Like others here, I don't understand all of the math involved in writing the number crunching algorithms used by BOINC. I read Prime Obsession about the Riemann Hypothesis, and understood only enough to know that prime number theory is extremely interesting!

But I usually learn a lot from these types of forums. If anyone can explain what frankhagen is hinting about, I'd appreciate it!

frankhagen
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Message 403 - Posted: 31 Dec 2014, 17:09:59 UTC - in response to Message 401.
Last modified: 31 Dec 2014, 17:20:10 UTC

So I don't really know, but I'll hazard a guess? Is it because the "R" in "ARM" stands for "RISC," which stands for Reduced Instruction Set Computing? Maybe these processors don't have the instructions needed for efficiently computing Fast Fourier Transforms?


bingo!

there are VFP coprocessor designs by arm, but you will not find such things on cheap gadgets.

and for the worst they are NOT IEEE 754 compliant even on latest arm socs.

plain simple: forget it.

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Message 404 - Posted: 1 Jan 2015, 1:32:44 UTC

So ... we still don't have an answer ... what does ARM stand for? (Tin hat on)

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Message 407 - Posted: 1 Jan 2015, 4:56:49 UTC - in response to Message 404.

So ... we still don't have an answer ... what does ARM stand for? (Tin hat on)

"Aren’t Rats Magnificent"

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Message 411 - Posted: 1 Jan 2015, 9:04:15 UTC - in response to Message 404.
Last modified: 1 Jan 2015, 9:07:39 UTC

So ... we still don't have an answer ... what does ARM stand for? (Tin hat on)

It's called Advanced RISC Machines. Take a look up on Wikipedia or Google if you want to know even more.

Sidenote: the abbration readed as a whole in German means poor or as synonym weak. Another hint for the "uselessness" of the thing nowadays. ;-)

Happy New Year to everyone btw.! ;-)
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Message 426 - Posted: 2 Jan 2015, 0:16:48 UTC - in response to Message 411.

The LLR application uses "gwnum code". This code is written for INTEL processors. Therefore you cannot compile the LLR application for ARM based OS's ..... until there is "gwnum code" available for ARM processors.

Chris Granger
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Message 431 - Posted: 2 Jan 2015, 14:12:01 UTC - in response to Message 352.

I was wondering if there is any support for the Raspberry Pi ARM processors. I have a whole army of RPi's with nothing to do.

Enigma@home http://www.enigmaathome.net/ has a dedicated Raspberry Pi application and would probably appreciate help from your army...

frankhagen
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Message 432 - Posted: 2 Jan 2015, 14:21:51 UTC - in response to Message 426.

The LLR application uses "gwnum code". This code is written for INTEL processors. Therefore you cannot compile the LLR application for ARM based OS's ..... until there is "gwnum code" available for ARM processors.


this will hardly ever happen simpy because afaik there is no arm-design that is IEEE 754 compatible.

there are commercial libraries for newer arm-design which supoort this, but since they need to emulate on that limited arm hardware....

zombie67 [MM]
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Message 433 - Posted: 2 Jan 2015, 14:40:08 UTC - in response to Message 431.

I was wondering if there is any support for the Raspberry Pi ARM processors. I have a whole army of RPi's with nothing to do.

Enigma@home http://www.enigmaathome.net/ has a dedicated Raspberry Pi application and would probably appreciate help from your army...



http://burdeview.blogspot.com/p/raspberry-pi-boinc-project-ive-created.html
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Message 492 - Posted: 3 Jan 2015, 19:05:02 UTC

This is a shame, because I keep my laptop loaded with BU tasks, normally, but have 2 or 3 ARM devices that are crunching for other projects, but I would love to donate more power to this project, but can't for now - once the project gets famous and grows, could there be an ARM app - it would get 1000s and 1000s more devices involved...
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