You could use the SSSE3 version (instead of only SSE3) on your Core2. The SSE3 binary retains compatibilty to AMD CPUs and may be a bit slower.

OK thanks - I don't think it'll make much difference - I'll give that a try... Seems also that he's using version 0.19....

This is looking more and more like me needing to compile 0.19 from source unless there are any binaries laying around for the lazy ;)

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The linux client is simply inefficient compared to win32.

I thought the fastest version of Speedimic is quite close.

Just looked it up, speedimics own Q9550 (45nm, 2.83GHz) is taking about 1030 seconds for a 27.77 credit WU under Linux.

He has another host (Q6600, 65nm, appears to be overclocked to 2.7-2.8GHz from the benchmark values) completing the same tasks in about 1150 seconds under Windows. It is a somehow bad comparison because of the different clockspeed and that the 45nm CPUs should be faster per clock than their 65nm counterparts, but nonetheless it is clear that his Linux version can't be that bad.

To be honest, the win-apps by ClusterPhysik are a bit faster.
Those Q6600ers aren't OC'd (the benchmark results might be a little off because of the 6.1 BOINC client)
If I recall it right, Cluster made some more modifications which didn't make it into stock code...

As stated before my apps are compiled from stock source and approved by Travis.

@mfl0p:
The compiler flag "-fp-model fast=2" doesn't make any difference - nighter in speed nor in accuracy (at least on my test box).

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mic.

[@mfl0p:
The compiler flag "-fp-model fast=2" doesn't make any difference - nighter in speed nor in accuracy (at least on my test box).

With Intel compiler 11.0 default -fp-model is fast=1. Using -fp-model precise on my linux machine gives the exact same results as expected in the test files forum thread. Changing to -fp-model fast (or any variation of fast) drops about 60 seconds off test parameters 86 runtime, at the expense of the deviated fitness result, like your app. But, it's irrelevant anyway, since it still produces a "close enough" answer, as mentioned in a few posts in this thread.

Figured I would mention it, for accuracy's sake, from Intel docs:

Recommendation: /fp:precise /fp:source (-fp-model precise –fp-model source) is the recommended form for the majority of situations where enhanced floating point consistency and reproducibility are needed.


Re: fpus on different architectures giving different results, I have observed this on the PPC platform, not using any math shortcuts in the compiler, all of the test file results match x86 except parameters 20, which has a devation of 1 at the 15th decimal place.

Yes, release ATI app for Linux, please. CUDA for all systems is under construction now, but it makes sense to make app for stronger cards first and ATI is the one. I hate running my machine under Win just to be able to run Milky on GPU. :-( And I do not think there are more guys with NVidia GTS/GTX 200 cards than Linux ones with ATI 38xx/48xx.

Count me in on the Linux 64b (Ubuntu) w/ HD3870 tally.

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- da shu @ HeliOS,
"A child's exposure to technology should never be predicated on an ability to afford it."

PLEASE, PLEASE, PLEASE!!! make ATI GPU 0.20 app for linux x64. I'm pissed off using windows... Right now I'm gonna build a rig for MW, but if there is a chance to avoid this - it will perfect :-)

And furthermore - there is app for linux in Collatz. What's the problem to make the same trick for MW?

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PLEASE, PLEASE, PLEASE!!! make ATI GPU 0.20 app for linux x64. I'm pissed off using windows... Right now I'm gonna build a rig for MW, but if there is a chance to avoid this - it will perfect :-)

And furthermore - there is app for linux in Collatz. What's the problem to make the same trick for MW?

Please see http://milkyway.cs.rpi.edu/milkyway/forum_thread.php?id=1475, once the code is available I plan on attempting to compile a version for GNU/Linux.

WOW, that's great news :-) Hopefully u'll get code soon

I'm not a geek in Linux (I'm using Ubuntu 3 years only), but u if need any help - feel free to contact me :-)

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how about a linux ati app.

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Blah blah blah you know the rest

how about a linux ati app.

+1. guys, what's the news? if there is any chance to get it done? PLEASE, I wanna switch my 2nd rig to linux

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I'll add my request in for a Linux ATI GPU application. Hasn't the source code been available for a while now?

The Linux x86-64 SSE4.1 app consistently crashed on me about 30% of the way through, with a SIGSEGV (segfault) error. I have a C2Q 9400 that should support it.

looks no1 really care :( that's weird...

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i also have a hd5870 just asking to crunch under linux64... is this being worked on or is my GPU doomed to only crunch collatz?

PLEASE, PLEASE, PLEASE!!! make ATI GPU 0.20 app for linux x64. I'm pissed off using windows... Right now I'm gonna build a rig for MW, but if there is a chance to avoid this - it will perfect :-)

And furthermore - there is app for linux in Collatz. What's the problem to make the same trick for MW?

Please see http://milkyway.cs.rpi.edu/milkyway/forum_thread.php?id=1475, once the code is available I plan on attempting to compile a version for GNU/Linux.

7 months later ... any change? My linux64/ati boxes have been parked on colatz for what seems like forever...

7 months later ... any change?

It would be nice to get an update on this since so much time has gone by. I'd still love to be able to use the ATI GPU in my Linux system.

7 months later ... any change?

It would be nice to get an update on this since so much time has gone by. I'd still love to be able to use the ATI GPU in my Linux system.

I'm working on a new OpenCL one which should work everywhere(Linux/OS X/Windows/Nvidia/ATI) right now. I hope to have it ready to release in 1-2 weeks.

I'm working on a new OpenCL one which should work everywhere(Linux/OS X/Windows/Nvidia/ATI) right now. I hope to have it ready to release in 1-2 weeks.

That's very nice to hear, Matt! There are a lot of people looking forward to testing it out when it's ready.

Hi Matt,

Nice to hear that :-)

R u talking about MilkyWay@Home Version 3 apps? if so, when we can expect them?

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I am thinking of going Linux with Intel and ATI/AMD GPU farm. How is this project shaping up? Any advice for set up?