LHC@home

I process SETI@Home which makes both GPU and CPU Tasks available. The SETI GPU Tasks have been "sliced" into something that runs about 15 CPU Minutes on my GPU while their CPU Tasks run much longer (hours). I believe they have done this because BOINC wasn't able to manage the GPU and do Tasks switching. (Maybe this is still the case.) So, if you got a GPU Tasks that ran hours (Enigma@Home?) it would capture the GPU and hog the processor.

Somewhat of a misunderstanding there. Exactly the same SETI tasks are sent to CPUs and GPUs (a few special cases round the fringes) - there is certainly no "differential slicing".

If tasks take 15 minutes on GPU, but hours on CPU - then your GPU is faster. That much faster.

You can confirm this by checking validated tasks. It's possible to see workunits validated with one tack computed by a GPU, its 'wingmate' computed by a CPU.

There's also no problem with task switching with a GPU. The only weakness is that "leave applications in memory while suspended" can't be implemented on GPUs: there is no mechanism for temporarily paging GPU VRAM to hard disk. So GPU applications only make sense if the science applications have a viable checkpointing mechanism which can still be implemented for the parallel-processing GPU app. Provided that's in place - no problem. But task switching does create more of an overhead if the entire app, dataset, and checkpoint has to be reloaded at every switch. I lengthen the task switch interval on machines which might suffer from that - but in general (the exception being GPUGrid), GPU apps are so fast that they never even reach the default 1 hour TSI.

Hi Filipe; I am awaiting a visit from my colleagues......
I'll try and remember to update you as soon as possible. Eric.

Geez, folks. Get off Eric's back. It isn't like he sits up all night with a hammer and chisel making tiny rocks out of big ones. I remember not too many years ago before the LHC came on-line when there were no work units at all for many months at a stretch. WU will come when they come. Surely you all are working on other projects to pass the time.

New tasks?
Shed some light on us, we are starving

Hope one of these is accessible. Please vote for production.
Have fun. Eric.

http://build-your-own-particle-detector.org/

https://cds.cern.ch/journal/CERNBulletin/2015/13/News%20Articles/2001046?ln=en

"These training tasks in limited numbers could be deployed to willing users so I'm ready to sacrifice some of my machine time to make correlative results."

Windows 7 Pro x64 SP1
INTEL CORE i7-2600 3.4GHz
16GB RAM
NVIDIA GPU
My network is Wi-Fi using Linksys WMP600N

I'll shut up now and let you get on with the work. :)

Thanks for the effort you are putting in.


Tom

Will it last over the Easter weekend?

I have a work machine that is now crunching away on SixTrack only, with all other Boinc projects suspended. It would be a shame if that machine sits idle over the weekend because the Sixtrack tasks run out.

Tonight in France, right now it fact, there's a movie called Atomic Apocalypse.
It's about a large particle collider creating a black hole and threatening the world.
...
Strange, I feel like I heard something like that before XD

Well after the series of "2012 Armageddon" based movies, nothing is surprising, everything will be used up to the core.

edit: wow, first part before ads cut ended, and it seems it's a serious case of people going berserk on misnaming and misdescribing something (though there's a collider involved, but that's the only thing they understood...maybe)