DirectX 11 vs. DirectX 12: Test results
18 Mar 2016 11:26:27 UTC
Topic 198511
(moderation:
So, I could not find any info on any advantages that DX12 might have over DX11 in regards to crunching data so I did a small test. Same machine, same drivers, same clocks and obviously the same app. The part above the line is Win 7 Pro SP1 & DX11, the part below the line is Win 10 Pro & DX12:
Average for (20 WUs): Binary Radio Pulsar Search (Parkes PMPS XT) v1.52 (BRP6-cuda32-nv301) windows_intelx86 - 5863.889 sec (CPU: 1158.082 sec)
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Average for (20 WUs): Binary Radio Pulsar Search (Parkes PMPS XT) v1.52 (BRP6-cuda32-nv301) windows_intelx86 - 5115.885 sec (CPU: 1180.757 sec)
DirectX 11 vs. DirectX 12: Test results
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DX cannot influence CUDA performance, it's a different interface not utilized for computing.
So the difference must be something else - OS, driver version with improved CUDA, or CPU availability to feed the tasks.
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I did not know that. But, as
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I did not know that. But, as I mentioned: same drivers, same machine with same clocks used in the exact same manner regarding CPU. However you want to classify the reason, the difference is there. I'm guessing that in the end its the OS... Or some optimization of the app that was done in the last 5-7 days that we are not aware of...
RE: Or some optimization of
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You would get much better performance using the Beta Cuda55
version of the app.
Bill
Well, that's the version the
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Well, that's the version the server sent. I have all of the apps approved for computing. I'll approve the test apps also and see if it'll send it in the next cycle.
RE: approve the test
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Yes, that is the setting needed.
Sadly, here on the forums we nearly always say "beta", but the actual web page item people need to activate does not have that word (though it does appear in the label appearing in the application column of the tasks view of boincmgr once you actually get that type of work downloaded).
The CUDA55 benefit over non-beta varies with GPU family. The ones listed for your hosts are all GTX970, so Maxwell2, which we have generally seen to have a very considerable benefit. More work completed per hour. More work completed per watt-hour, and reduced CPU support requirement.
Excellent. I'm currently
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Excellent. I'm currently 'banned' from getting new tasks, I'm assuming its because I aborted a bunch of them because I was setting up the factor for the gpu (to 0.33) in order to fill up the usage of the GPU. Should be up and running when the server sends new tasks.
RE: ... I'm assuming its
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You do not need to abort anything in order to change the GPU utilization factor. You just need to download one new task and any existing tasks in your work cache will be crunched using the new factor.
The list of tasks for your host with the ID=12195870, shows a total of 856 tasks downloaded with 768 of those aborted and zero currently in progress. A lot of server resources would have been used to allocate all those tasks to your host, not to mention the wasted download bandwidth for all the large data files for the many different frequency ranges for the new gravitational wave run (O1AS20-100F). You must have huge work cache (days of work) preference settings to get so much allocated so quickly.
While you're in the 'sin bin' you should take the time to learn how to properly choose your preference settings. When starting, keep your work cache small so that if you change your mind about something or if something goes wrong you don't need to trash so much. You can choose which particular science runs (either for GPU or for CPU) you wish to support and exclude the others. If you don't understand something, please ask. Responses are usually quite fast.
E@H is a popular project and it's server resources are already under high pressure. You will notice this if you observe how long it can take at times to complete server requests. Please don't add to this unnecessarily.
Cheers,
Gary.
Ok, understood. Apart from
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Ok, understood. Apart from the Arecibo GPU, Parkes PMPS XT and their beta versions are there any other GPU apps at the moment?
No.
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No.
Cheers,
Gary.