My computer is dual boot (Windows XP Home and Ubuntu 9.04), so I have been trying to find out which version crunches Cosmology work units quickest, but due to differences in run times I have been unable to form a conclusion.
Is there any real speed difference between the Windows and Linux applications?

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From what i see of it microsoft seeme a little faster that linux,
but not by mutch,

Of the three athlon xp machines i run on cosmo the
xp 3000, running linux has a lower rac than the
xp 2600 mobile or
xp 2600 desktop cpu and it has only 256 L2.
And just to round things off nicely i am running 98se :)
Dont knock linux for the diferance,
it all depends on how the program is written and then compiled for the diferant operating systems.

Can anyone tell me why my benchmarks under Linux are only half as much as those under Windows?

Is it a hardware issue, or an operating system issue, or a BOINC issue?

The Windows side is using 6.6.36, while the Ubuntu side is using 6.6.40.

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It`s a known BOINC issue its been like that for years
and the boinc developers still havent fixed it
they have spent a lot of time on getting CUDA to work,
and there is plenty more of that to do
we linux users will just have to live with it,
until seti@home finds some aliens to fix it, or something like that :)

Can anyone tell me why my benchmarks under Linux are only half as much as those under Windows?

Check if a PowerSave program or something similar is enabled. This throttles down the CPUs very much.

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Life is Science, and Science rules. To the universe and beyond
Member of BOINC@Heidelberg
My BOINC-Stats

Check if a PowerSave program or something similar is enabled. This throttles down the CPUs very much.

OK, in Services I have disabled "CPU Frequency manager", and my benchmarks have gone up by 30%, so now they are about two thirds of the Windows benchmarks.

I suppose I can be satisfied with that.

I hope that by disabling the CPU Frequency manager it won't cause any problems for the CPU.

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I get 30% higher benchmarks in Ubuntu over Vista x64. XP x64 isn't as bad but almost...Actual time to finish - it honestly seems Windows are faster even though the benches are worse.

But, Milkyway GPU is Windows only - so the sacrafice of 30% is outweighed by GPU output.

CPU thing is disabled in my Ubuntu as well, but still starts up so I can see the speed in right-hand corner. Error still hits on loading.

Using 940 BE at 3.5 now in XP x64 (until that's watercooled) in htpc..need videocard for sig rig then moving 4870 here for Milkyway (which will also heat my living room).

Sig rig is 550 BE unlocked to x4 on water at 3.8..(heats room upstairs) Quad core for $102 with 6 MB L3 cache?) (that will look so 80's when found in 2 years)

Cores galores!!

no matter what chip I put in - seems that linux is better for my CPU's on all these projects. But since I'm ATI I use Windows for GPU/ hence - milkyway..

When Cosmology has both for Linux client...oh man.....here we go...you'll see.

The milkyway app is pretty impressive. What took 80-150 minutes on cpu now takes 35-52 seconds...hence why I wanna throw a 5850 at it......

Just something to think about everyone..weigh them both when worrying about which OS..CPU and GPU utilization..

So 2 PC's - both clients with cores dedicated to Cosmology now.

So I map the Milkyway in 3D, try to figure out the entire thing Cosmo)- AND who's living here in it with us(SETI)...

And Enigma still eludes the Phenoms....

(All the above projects were used testing my hypothesis that Linux Client smoked both my MS Benchies over a period of months on a number of projects)

I still need to boot my Linux on my house broken 550 too...saw way higher benchies on that thing in Windows (940 @3.67 in Linux (higher stability for BOINC in Linux for me at the higher speed).

I betcha with my new motherboard and chip I'll be able to do 3.9 plus stable in Linux topping 13K Dhrystone.

Any proof needed and click my stats and check all the systems - the benches are all there..

4870 on sig rig until I get hands on 5850..940 using HD 3200 onboard..no double precision - I looked...no crunching with it lol..

Other reason we need good GPU client for all is so we can compare the brands on fair ground...

Linux client gripe - yes, bugs....as the others alluded to. The fact that the "Use while computer in use" button actually working would be a plus...haha. Basically you set it to always run at some level or shut it off completely - there's no in between....