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Number crunching :
7970s Dont Run
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Send message Joined: 15 May 11 Posts: 1392 Credit: 5,774,953 RAC: 0 |
I have now successful run it on HD7950 with 13.4 driver but against 5xxx/6xxx serie poor speed. It must have 30%-40% more speed increase. The client still needs some optimizations with 7xxx serie. Thank you! It works. http://moowrap.net/results.php?hostid=9050&offset=0&show_names=1&state=4&appid= |
Send message Joined: 21 Jul 13 Posts: 4 Credit: 28,947,932 RAC: 0 |
Hi all! Yah, the solution provided by rebirther works also for me with 7970 card (Windows 7 64 bit and CCC 13.4) Thanks :) Actually rebirther already mentioned the performance topic, but I also want to add my thoughts and experience here... With my i7 3770K with 8 cores I can finish 8 tasks within 96 minutes. With GPU I can finish 1 task within about 18 minutes. This means I can finish 2.67 more tasks with my CPU in same time. I thought that a GPU can compute much faster. I guess it is a question of the input data/type of calculation, which can be still optimized in the software, that it performs faster. Is it like that? |
Send message Joined: 2 May 11 Posts: 10 Credit: 4,408,435 RAC: 0 |
Hi all! Thats not right. I think the GPU will be feed with some more packages to crunch than the CPU can do it. |
Send message Joined: 21 Jul 13 Posts: 4 Credit: 28,947,932 RAC: 0 |
Yes, I thought that some minutes after I posted it. I saw that the GPU tasks are much bigger (1'344'000 GFLOPs) compared with the CPU tasks, but at the moment I dont have a CPU task in my queue and I cannot compare it, but I think it was around 4000 GFLOPs for CPU tasks (?). Thanks. |
Send message Joined: 22 Jun 11 Posts: 2080 Credit: 1,844,407,912 RAC: 3,236 |
Did you try leaving one cpu core free for the gpu to use? Sometimes the gpu gets bound up and needs a cpu core just to keep it running at full speed. You said you have no cpu tasks from Moo, but are you running cpu tasks from other projects right now? If so change the Boinc Manager so only 7 tasks run at once and see if your gpu speeds up quite a bit. Also are you using a file like this: <app_config> <app> <name>moo</name> <gpu_versions> <gpu_usage>0.5</gpu_usage> <cpu_usage>0.05</cpu_usage> </gpu_versions> </app> </app_config> to run two gpu units at once? Changing the 0.5 in the gpu usage line to a 0.33 would run 3 units at once, making it 0.25 would run 4 units at once. I have no idea where the sweet spot is on your gpu but I am pretty sure one at a time isn't it. |
Send message Joined: 21 Jul 13 Posts: 4 Credit: 28,947,932 RAC: 0 |
@mikey 1 of 8 CPU threads is free always, if I process GPU tasks. 7 CPU threads are used for other projects. The GPU is on maximum 94% load always (not sure why not 100%, maybe a limiter in the Moo/dnetc software?). I think everything is fine, but I did not know that GPU tasks are much bigger than CPU tasks. Thats why I thought there is some problem. Now I think my GPU performs very well ;) Or do you think it should/must perform better? (1'344'000 GFLOPs task within about 18 minutes) @All Will this fix be available in an official release soon? Update: One of my CPU tasks had 15750 GFLOPs and it took 83 minutes. If I compare everything then I get following... -> GPU -> 1168.70 GFLOPS -> CPU (1 thread) -> 3.13 GFLOPS -> CPU (8 threads) -> 25 GFLOPS -> The GPU is 46 times faster 1168.70 GFLOPS is more than described in the AMD specifications for double precision floating operations. If single precision would be enough then it could compute 4 times faster :D But I guess there is no performance improvement possible, because the project needs double precision (or whatever it is doing^^). I am not familiar with that, so I am shutting up now ;) |
Send message Joined: 22 Jun 11 Posts: 2080 Credit: 1,844,407,912 RAC: 3,236 |
@mikey I believe MilkyWay is the only gpu project that uses double precision, I do not believe Moo does. I have half a dozen AMD 5770 gpu's and they all worked here just fine, but since they are not double precision they will not work at MilkyWay. And your findings are normal, the gpu is much faster then a cpu when crunching. I cannot say though if 46 is normal or not, I have usually heard a rough guess of 10 times, but thru optimization I am not surprised that has increased. |
Send message Joined: 21 Jul 13 Posts: 4 Credit: 28,947,932 RAC: 0 |
If it is like that, then now again I think my GPU performs bad :D |
Send message Joined: 22 Jun 11 Posts: 2080 Credit: 1,844,407,912 RAC: 3,236 |
I think you are seeing the new 79xx app not performing up to its peak potential at this point. The 79xx app is brand new and still has alot of tweaking that can be done, but it will take some time before it hits its stride. |
Send message Joined: 4 Nov 12 Posts: 3 Credit: 2,440 RAC: 0 |
Has anyone tried out the new release to see if they work now? |
Send message Joined: 15 May 11 Posts: 1392 Credit: 5,774,953 RAC: 0 |
Has anyone tried out the new release to see if they work now? Do you mean v2.9111.520 ? I use it. |
Send message Joined: 4 Nov 12 Posts: 3 Credit: 2,440 RAC: 0 |
That'd be the one, does it work with the 7xxx's...or at least the ones that weren't working before? |
Send message Joined: 15 May 11 Posts: 1392 Credit: 5,774,953 RAC: 0 |
That'd be the one, does it work with the 7xxx's...or at least the ones that weren't working before? Still works. |
Send message Joined: 22 Jun 11 Posts: 2080 Credit: 1,844,407,912 RAC: 3,236 |
That'd be the one, does it work with the 7xxx's...or at least the ones that weren't working before? Where did you get the ver 2 drivers? |
Send message Joined: 15 May 11 Posts: 1392 Credit: 5,774,953 RAC: 0 |
That'd be the one, does it work with the 7xxx's...or at least the ones that weren't working before? ver 2 drivers? I dont understand now. i use cat 13.4 drivers. |
Send message Joined: 4 Nov 12 Posts: 3 Credit: 2,440 RAC: 0 |
Still works or now works? I mean without having to make any adjustments at all. |
Send message Joined: 22 Jun 11 Posts: 2080 Credit: 1,844,407,912 RAC: 3,236 |
That'd be the one, does it work with the 7xxx's...or at least the ones that weren't working before? A couple posts back you said "Do you mean v2.9111.520 ? I use it." |
Send message Joined: 15 May 11 Posts: 1392 Credit: 5,774,953 RAC: 0 |
That'd be the one, does it work with the 7xxx's...or at least the ones that weren't working before? It is not a driver. It is a version of this program. Download it from http://www.bc-team.org/downloads.php?view=detail&df_id=80 |
Send message Joined: 14 Oct 11 Posts: 5 Credit: 58,058,899 RAC: 0 |
does this work with 79xx without issues? please tell me. |
Send message Joined: 22 Jun 11 Posts: 2080 Credit: 1,844,407,912 RAC: 3,236 |
That'd be the one, does it work with the 7xxx's...or at least the ones that weren't working before? Ahhh thank you! |