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Keith Myers Send message Joined: 29 Apr 01 Posts: 13164 Credit: 1,160,866,277 RAC: 1,873 |
I keep seeing this kind of post. Someone show me the proof that all the naysayers state that older Nvidia cards will go poof or that the system becomes unusable. Seti@Home classic workunits:20,676 CPU time:74,226 hours A proud member of the OFA (Old Farts Association) |
Stephen "Heretic" Send message Joined: 20 Sep 12 Posts: 5557 Credit: 192,787,363 RAC: 628 |
Let me guess that we're going to get lots and lots of _2, _3, _4, _x tasks being resent, when older Nvidia cards goes Poof...... . . Think of it as culling the herd ... Stephen :) |
Stephen "Heretic" Send message Joined: 20 Sep 12 Posts: 5557 Credit: 192,787,363 RAC: 628 |
Let me guess that we're going to get lots and lots of _2, _3, _4, _x tasks being resent, when older Nvidia cards goes Poof...... . . I expect there will be some of both ... Stephen |
Keith Myers Send message Joined: 29 Apr 01 Posts: 13164 Credit: 1,160,866,277 RAC: 1,873 |
. .. I just hope there are sufficient safeguards to keep them off older nvidia hardware/apps. I have posted about a Kepler 680 that didn't seem to have any issues with the VLAR. And I know that Richard Haselgrove said he got some on his GTX 470 card. That is probably the worst case I can think of. I don't think the earlier cards are even able to run the SoG app or the CUDA app below 3.2. Seti@Home classic workunits:20,676 CPU time:74,226 hours A proud member of the OFA (Old Farts Association) |
Stephen "Heretic" Send message Joined: 20 Sep 12 Posts: 5557 Credit: 192,787,363 RAC: 628 |
The unaswered question is: Allowing Arecibo Vlar on NVidias was an accident or something scheduled? . . A large part of the historical failures of these tasks on Nvidia hardware can be traced to the app running it. The new apps, SoG and CUDA60 upwards, can cope with them but I am not sure how far back in hardware terms. I suspect Pre-Fermi gear may see lots of blue smoke, if only from the ears of the operators ... Stephen :( |
Wiggo Send message Joined: 24 Jan 00 Posts: 34841 Credit: 261,360,520 RAC: 489 |
I keep seeing this kind of post. Someone show me the proof that all the naysayers state that older Nvidia cards will go poof or that the system becomes unusable. The last time that they were unleashed on us was under the old Cuda apps and back then they just brought my rigs with GTX 550/560 Ti's and GTX 660's to their unusable knees. But it will be interesting to see how they go with the SoG app. Cheers. |
Stephen "Heretic" Send message Joined: 20 Sep 12 Posts: 5557 Credit: 192,787,363 RAC: 628 |
. . I am confident SoG can handle them on Kepler and I think CUDA60 will too, but I was running an old 8600GS (256Mb) at one point, and I know there are still some hosts with that level of hardware, and they will be running CUDA32 or earlier and that will be interesting .... . . The GTX470 is Fermi right? I am guessing it is running SoG? It will be interesting to hear from Richard on his results. Stephen ? ? |
Keith Myers Send message Joined: 29 Apr 01 Posts: 13164 Credit: 1,160,866,277 RAC: 1,873 |
I had a hunch all the negativity was on the older CUDA 32, 42 or 50 apps. Did they ever get tested on Beta with the SoG app which is the stock app now? The SoG app has lots of parameters for tuning to alleviate system lagginess. Seti@Home classic workunits:20,676 CPU time:74,226 hours A proud member of the OFA (Old Farts Association) |
Stephen "Heretic" Send message Joined: 20 Sep 12 Posts: 5557 Credit: 192,787,363 RAC: 628 |
I keep seeing this kind of post. Someone show me the proof that all the naysayers state that older Nvidia cards will go poof or that the system becomes unusable. . . This may be a good time to see if they help with the temp problems on the 560ti. They may let it run cool enough to press on with ... Stephen ?? |
Keith Myers Send message Joined: 29 Apr 01 Posts: 13164 Credit: 1,160,866,277 RAC: 1,873 |
Yes the GTX 470 is Seti@Home classic workunits:20,676 CPU time:74,226 hours A proud member of the OFA (Old Farts Association) |
Stephen "Heretic" Send message Joined: 20 Sep 12 Posts: 5557 Credit: 192,787,363 RAC: 628 |
. . But there will be some old timers out there plugging along with Anonymous platform and running Cuda32 or 22 or whatever who may get some nasty surprises ... Stephen :( |
Keith Myers Send message Joined: 29 Apr 01 Posts: 13164 Credit: 1,160,866,277 RAC: 1,873 |
Yes, that might be expected. If so, I'm sure we will begin to see bewildered posts here in Number Crunching or the Questions and Problems forums. Plenty of us experts around to write a reply on how to fix the problem or deliver the bad news. I think this might be a good thing in the end as this will force the set and forget type to reconnect with the project. They might be some of the bad hosts that plague us and we have never been able to contact to tell them their hosts have issues. Seti@Home classic workunits:20,676 CPU time:74,226 hours A proud member of the OFA (Old Farts Association) |
TBar Send message Joined: 22 May 99 Posts: 5204 Credit: 840,779,836 RAC: 2,768 |
Actually the Old CUDA Apps are still active as a Stock App. If you don't have a working OpenCL Driver you will be sent the OLD Baseline CUDA App, as long as you have a working CUDA Driver. The main problem the last time the Arecibo VLARs were released was people had their machines set to run 2 or 3 CUDA MB tasks at once. One VLAR will load the One Compute Unit used by the Old CUDA App on the VLARs, more than One VLAR at a time will bring it to it's Knees. If you have the machine set to run just One task at a time it should be bearable, but annoying. The New Linux & Mac CUDA Apps use ALL the Compute Units on the Arecibo VLARs, so there really isn't any difference from the OpenCL App. All My machines are pretty much loaded with the Arecibo VLARs, there must be a Large number of them. If they hadn't of started sending them, people would be moaning about being out of GPU tasks. Hopefully these episodes won't be very common and people will be running BLCs most of the time. |
Keith Myers Send message Joined: 29 Apr 01 Posts: 13164 Credit: 1,160,866,277 RAC: 1,873 |
Good to know Tbar. Hadn't thought of the issue of no OpenCL driver loaded forcing CUDA as a case. I was rather surprised of the many Arecibo tapes loaded this morning. More recently it has been one or two Arecibo tapes loaded each day on a hit or miss. I think that most of us had expected a constant ramping down of Arecibo work what with the hurricane and funding issues telescope has had recently. And we have been told that work from Arecibo would become rarer and to expect more BLC tasks as the norm. So these VLAR tasks are rather unexpected. I haven't found a Arecibo VLAR running on my Windows systems yet. Must have loaded up on standard AR tasks beforehand. Lots of Arecibo VLARS have moved through the high output Linux boxes with no issues. Seti@Home classic workunits:20,676 CPU time:74,226 hours A proud member of the OFA (Old Farts Association) |
Ghia Send message Joined: 7 Feb 17 Posts: 238 Credit: 28,911,438 RAC: 50 |
On my 780Ti the Arecibo VLARs run about double the time of non-VLARs and pay offt at the same rate...at least for now. But at the same time, I have a couple of APs running on the CPU (SSE and SSE2). They were calculated to over 5 hours, but they're already past that and ticking down sooo slowly, I wonder how long they'll actually take. I don't think I've seen those before... Humans may rule the world...but bacteria run it... |
Zalster Send message Joined: 27 May 99 Posts: 5517 Credit: 528,817,460 RAC: 242 |
Are we sure these are Arecibo? Didn't they mention something about a 3rd source of data would be rolling out? |
TBar Send message Joined: 22 May 99 Posts: 5204 Credit: 840,779,836 RAC: 2,768 |
If you open a task with a TextEditor it says it's Arecibo; <receiver_cfg> <s4_id>14</s4_id> <name>Arecibo 1.4GHz Array, Beam 5, Pol 1</name> <beam_width>0.0500000007</beam_width> <center_freq>1420</center_freq> <latitude>18.3538056</latitude> <longitude>-66.7552222</longitude So, it's probably from Arecibo. |
Keith Myers Send message Joined: 29 Apr 01 Posts: 13164 Credit: 1,160,866,277 RAC: 1,873 |
We're supposed to get Parkes data from Australia eventually. But I don't think that data has arrived yet. I don't think the prep work for that data has been finished yet. If and when we do get it, I bet it has its own naming convention like the Green Bank telescope does. Seti@Home classic workunits:20,676 CPU time:74,226 hours A proud member of the OFA (Old Farts Association) |
petri33 Send message Joined: 6 Jun 02 Posts: 1668 Credit: 623,086,772 RAC: 156 |
Volta does Arecibo tasks in 75 seconds and a 1080 does them in 150 seconds. Nice! VLAR work is totally ok. Credit per wu is bigger too. I'll wait till APR scales back up. If it does not I'll find out what do I need to optimize next. Petri To overcome Heisenbergs: "You can't always get what you want / but if you try sometimes you just might find / you get what you need." -- Rolling Stones |
Grant (SSSF) Send message Joined: 19 Aug 99 Posts: 13746 Credit: 208,696,464 RAC: 304 |
So does anybody that worked on Beta remember in general the compute times for Arecibo VLARs? About all I can remember is they made the system slightly more laggy than GBT WUs when running SoG. Anyone running a CUDA32/42/50 application will be in for a world of pain. Grant Darwin NT |
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