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Application Code Discussion :
GPU app teaser
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Send message Joined: 6 Apr 08 Posts: 2018 Credit: 100,142,856 RAC: 0 |
It's my personal opinion, but I think that a full list of compatible GPUs might be great, because I can read here and there some questions about the compatibility of cards. Maybe the label "HD38x0 or HD48x0" isn't clear for all people. Maybe something like this : If you do that, and it's in these MW forums, I'd be happy to link zslip to reference it. |
Send message Joined: 12 Nov 08 Posts: 26 Credit: 1,542,686 RAC: 0 |
You can take a look (it's an alpha version ^^) : http://www.starwars-holonet.com/boinc/mw.html Just to get an idea. You can take the code of course ^^ Star Wars BOINC Team |
Send message Joined: 6 Apr 08 Posts: 2018 Credit: 100,142,856 RAC: 0 |
You can take a look (it's an alpha version ^^) : Well, it's certainly a well laid out table and easy to read. I'm always pleased to take advantages of improvements, so if you're serious in that I can use the code for your table, I might just do that. Thanks ;) |
Send message Joined: 12 Oct 07 Posts: 77 Credit: 404,471,187 RAC: 0 |
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Send message Joined: 12 Nov 08 Posts: 26 Credit: 1,542,686 RAC: 0 |
I'm serious. It took me 5 or 10 minutes to do that, so it's not a big work ^^ Take everything you want. If you want me to do something else, do not hesitate ^^ (exarkun_AT_free.fr if you want to talk more about it)
Thank you ^^ Star Wars BOINC Team |
Send message Joined: 12 Nov 07 Posts: 2425 Credit: 524,164 RAC: 0 |
What can I have? ;P Doesn't expecting the unexpected make the unexpected the expected? If it makes sense, DON'T do it. |
Send message Joined: 12 Nov 08 Posts: 26 Credit: 1,542,686 RAC: 0 |
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Send message Joined: 6 Apr 08 Posts: 2018 Credit: 100,142,856 RAC: 0 |
Many thanks for that Exar Kun. I have imported your code into zslip.com and tweaked it just a little bit. I think it's a great improvement - thanks ;) |
Send message Joined: 12 Oct 07 Posts: 77 Credit: 404,471,187 RAC: 0 |
Many thanks for that Exar Kun. I have imported your code into zslip.com and tweaked it just a little bit. You should mention cat /proc/cpuinfo for the linux CPU capabilities. Good suggestion Exar Kun and well done Ice for implementing it |
Send message Joined: 6 Apr 08 Posts: 2018 Credit: 100,142,856 RAC: 0 |
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Send message Joined: 23 Feb 08 Posts: 20 Credit: 804,381 RAC: 0 |
@ Cluster Physik: Does CPU speed matter in re: to GPU application? or does GPU app not have any significant dependency on CPU? Would one expect a major difference running Pent D or AMD X2 for example vs. a Core2 CPU? Thx. |
Send message Joined: 26 Jul 08 Posts: 627 Credit: 94,940,203 RAC: 0 |
Does CPU speed matter in re: to GPU application? or does GPU app not have any significant dependency on CPU? Would one expect a major difference running Pent D or AMD X2 for example vs. a Core2 CPU? As not the whole computation is done on the GPU (just 99.5% or so) it may have a small effect. But I would say it is less than one second difference per WU between a P4 and a Core2 for instance. Quite a bit of this CPU computation time can be hidden when running 2 WUs (or more) concurrently. When one WU waits some milliseconds for the GPU to complete the current task, another WU can calculate its CPU part. That's actually the reason I've integrated the possibility to run several WUs concurrently. It slightly increases the efficency. For slower CPUs it just pays off more. |
Send message Joined: 23 Feb 08 Posts: 20 Credit: 804,381 RAC: 0 |
Does CPU speed matter in re: to GPU application? or does GPU app not have any significant dependency on CPU? Would one expect a major difference running Pent D or AMD X2 for example vs. a Core2 CPU? Thanks for answering my question. Excellent! Also...this is good news as I have a PentD 945 & ECS C19A MB that are brand new, but it never seemed worth building after Core2 came out.....until now. Just need to add an ATI 4850, load-up xp64 Professional & it will have a legitimate new purpose. Cool! Edit: Last question. How many WUs can a card run w/o any performance degredation w/ 512MB GPU memory? I understand throughput remains the same untimately, but I'd be inclined to run a greater # of WUs vs. individually if there's not a performance penalty. |
Send message Joined: 19 Feb 09 Posts: 33 Credit: 1,134,826 RAC: 0 |
When can we expect a 32-bit version? I'm so excited! :D EDIT: I found both versions here. http://www.file-upload.net/download-1465057/Milkyway_0.19_ATI.zip.html EDIT2: This is what I'm getting from the 32-bit app on a 4850. 2/18/2009 10:44:59 PM|Milkyway@home|Starting ps_s86_9_219475_1235014948_0 2/18/2009 10:44:59 PM|Milkyway@home|Starting task ps_s86_9_219475_1235014948_0 using milkyway version 19 2/18/2009 10:45:00 PM|Milkyway@home|Computation for task ps_s86_9_219475_1235014948_0 finished 2/18/2009 10:45:00 PM|Milkyway@home|Output file ps_s86_9_219475_1235014948_0_0 for task ps_s86_9_219475_1235014948_0 absent |
Send message Joined: 19 Feb 09 Posts: 33 Credit: 1,134,826 RAC: 0 |
Aha, I fixed my Issue, turns out my CCC was slightly corrupted. A reinstallation fixed it. Edit: DAAAAAAAAAAYUM!!! Nearly a credit/sec of CPU time. Amazing!! |
Send message Joined: 12 Nov 08 Posts: 26 Credit: 1,542,686 RAC: 0 |
I just saw the new 32 bit version for ATI GPU. It's a good news, but is there any performance difference between 32 and 64 bits ? If the calculation times are the same, I will come back to my Xp 32 bits ^^ Star Wars BOINC Team |
Send message Joined: 12 Nov 08 Posts: 26 Credit: 1,542,686 RAC: 0 |
Another question (sorry if it's stupid ^^) : why the optimized application, specially the GPU app, are not available on the MW website with a big-red-flashing font ? :) I found this thread only by (extreme) luck, and I think that a lot of people don't know they can optimize their participation. But maybe it will be a charge to heavy for the server ? Star Wars BOINC Team |
Send message Joined: 26 Jul 08 Posts: 627 Credit: 94,940,203 RAC: 0 |
Another question (sorry if it's stupid ^^) : why the optimized application, specially the GPU app, are not available on the MW website with a big-red-flashing font ? :) I found this thread only by (extreme) luck, and I think that a lot of people don't know they can optimize their participation. But maybe it will be a charge to heavy for the server ? Because the developement is not finished yet. It runs, yes, but there are still some issues that should be resolved before it is ready for prime time. There are some reasons why the thread title is "GPU app teaser" and the applications are clearly labeled as an alpha test. The 32Bit variant exists 20 hours now and the very first feedback indicated there may be some problem with XP32 and the HD3800 series cards. It is not tested much (the 32bit compilation not at all, I have no possibility to do it). That's the reason a small scale test may be better in the beginning than to have to pull back a faulty application after a full blown rollout. |
Send message Joined: 26 Jul 08 Posts: 627 Credit: 94,940,203 RAC: 0 |
I just saw the new 32 bit version for ATI GPU. It's a good news, but is there any performance difference between 32 and 64 bits ? There shouldn't be any significant difference. |
Send message Joined: 22 Nov 07 Posts: 285 Credit: 1,076,786,368 RAC: 0 |
It's my personal opinion, but I think that a full list of compatible GPUs might be great, because I can read here and there some questions about the compatibility of cards. Maybe the label "HD38x0 or HD48x0" isn't clear for all people. Maybe something like this : Is this list updated.. I am doing a quick inventory on my hosts and to my surprise I have found several with ATI cards.. Not sure if they are compatible... . |
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