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ATI AstroPulse beta test started on Lunatics
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Luke Send message Joined: 31 Dec 06 Posts: 2546 Credit: 817,560 RAC: 0 |
Personally, I will be scared the day ATI support arrives mainstream at SETI@home. I appreciate all Lunatics does - and it does it beautifully! It's just it will be abused by credit whores. Admittedly, it is a strange position. I just care for the project... and with ATI available to the general public, the credit hounds from MW will arrive, with their huge appetite for work needing to be satisfied. It'll put more strain on the (already strained) servers, leading to more outages and less work available for the 90% of others. I'm talking RACs in the TENS of MILLIONS, not in the hundreds of thousands as it is currently. And the the tide will change from a science oriented project to that of a credit oriented project, for others to abuse. It hasn't happened so much with CUDA, since it isn't (as of now, could be soon though) as powerful as some of the more top of the line Radeon GPU's. MW is relatively fine with the amount of WU's being sent out, SETI is a little more dependent on other things, such as whether the ALFA reciever is on, whether work can be sent back to Berkeley, and all assuming Arecibo is not closed! LOL. I won't be seen doing SETI@home WU's with a calculator thanks... It'd take years. - Luke. |
Paul D. Buck Send message Joined: 19 Jul 00 Posts: 3898 Credit: 1,158,042 RAC: 0 |
Admittedly, it is a strange position. I just care for the project... and with ATI available to the general public, the credit hounds from MW will arrive, with their huge appetite for work needing to be satisfied. It'll put more strain on the (already strained) servers, leading to more outages and less work available for the 90% of others. I'm talking RACs in the TENS of MILLIONS, not in the hundreds of thousands as it is currently. And the the tide will change from a science oriented project to that of a credit oriented project, for others to abuse. Their might be some shift... but it will not be by the credit hounds ... the pay per CPU second is far better at MW than it is here... and the efficiency of the SaH application using the GPU is far lower here than there, or Collatz or even DNETC. If there is an influx, it will be by those that have an ATI card and are interested in SaH... As an example, I am almost all over to ATI cards now and yet I have not bothered to try the AP application for the simple reason that it uses too much CPU and not enough GPU. MW and the rest are very low CPU usage and very high GPU usage (in the high 90s) so you get far more for your time in those other projects. The other piece of good news from your perspective is that GPU Grid announced recently that they have made a breakthrough in their ATI application and may be close to a beta soon on it ... though they are still way inefficient with ATI cards being half the speed of CUDA cards instead of the "normal" other way around. So, I would not get too concerned... |
Raistmer Send message Joined: 16 Jun 01 Posts: 6325 Credit: 106,370,077 RAC: 121 |
I will not go in thechnical details right now, need to go on work. But to give you relieve from your fears: currently implemented AP algorithm is memory bound. ATI memory subsystem not very powerful one re NV's or CPU. So don't expect so high RAC as MW will pay. Actually, ATI on SETI main will be true holy grail for "science oriented" participants. Cause MW always will pay better, no sense to do SETI for "credit whores" then :D |
W-K 666 Send message Joined: 18 May 99 Posts: 19059 Credit: 40,757,560 RAC: 67 |
Personally from what I have read it is not that the gpu app is fantastically efficient on the other high paying projects. It is that their cpu apps are very inefficient, and credits are calculated from the cpu app, with old time * BM calculation. So if task credits = 'very long time' * 'bench mark' and then you add app where the task get the same credits and time is very, very short. Then it starts to look as though it is a very, very efficient high paying app. Which is probably not true, in is probably only a run of the mill fairly efficient app. That most programmers could do using the correct compiler. |
Raistmer Send message Joined: 16 Jun 01 Posts: 6325 Credit: 106,370,077 RAC: 121 |
Then it's time to try ;) GPU load near 97% most of time. |
Paul D. Buck Send message Joined: 19 Jul 00 Posts: 3898 Credit: 1,158,042 RAC: 0 |
What is the CPU load? And which version? |
Raistmer Send message Joined: 16 Jun 01 Posts: 6325 Credit: 106,370,077 RAC: 121 |
On 5770 for 22k seconds of elapsed time were ~500 CPU seconds used. On HD 4870 result slightly worse. For ~same elapsed time ~1000 secs of CPU used. CPU is Core2-based in both cases. Duo and Quad I suppose, small difference in freqs not very important for this estimate. |
Paul D. Buck Send message Joined: 19 Jul 00 Posts: 3898 Credit: 1,158,042 RAC: 0 |
On 5770 for 22k seconds of elapsed time were ~500 CPU seconds used. That is not that bad ... Though my recollection is that the beta is semi-closed ... At any rate I have a huge amount of SaH D/L for the one system I am running SaH on though the CUDA card is working pretty hard to catch up on the work that BOINC went wild and obtained... another bug that UCB keeps telling me that it is all in my imagination ... Oh, my, I just got to seem my computer crash! |
Fred J. Verster Send message Joined: 21 Apr 04 Posts: 3252 Credit: 31,903,643 RAC: 0 |
Opened an Account in SETI Bêta, tried 2 app.'s, r280 &r393, but made an error in app_info.xml and gone where my 4 AP WU's. Now I have them running at MW, both 5770 and 4850, or there are 2 running at the EAH4850, since that is a Double_Prrecision, HD5770 is not. Also DL'ed the ATI SDK 2.1, but don't know which app. should be tested? |
Raistmer Send message Joined: 16 Jun 01 Posts: 6325 Credit: 106,370,077 RAC: 121 |
I replied to you on SETI beta forum. In short, with your GPUs you could try rev420 build. Can be downloaded here: http://lunatics.kwsn.net/18-astropulse-testing/ati-sse3-astropulse-app-openclbrook-beta-testing.0.html |
Fred J. Verster Send message Joined: 21 Apr 04 Posts: 3252 Credit: 31,903,643 RAC: 0 |
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