Nvidia GPU compute client only doing 1/5 of the required work
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Nvidia GPU compute client only doing 1/5 of the required work
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Send message Joined: 4 Feb 11 Posts: 86 Credit: 60,913,150 RAC: 121  
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I recently had to shut off GPU work for this project in my preferences because the Nvidia GPU client was only doing the final work unit in the now-standard 5 work unit bundle, causing my work to be declared as validate errors. The client was working fine until April 1 (No, this is no April fools joke.) My GPU is still generating valid work for other projects. Is anyone else having a similar problem? |
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Send message Joined: 4 Feb 11 Posts: 86 Credit: 60,913,150 RAC: 121
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I also noticed that I am using the SSE4.1 path when my CPU, a Xeon E5-2690 v3, is capable of using AVX. In the work units where the GPU client failed, those who did the cleanup work after my computer messed up were using an AVX path. Could something be wrong with the SSE4.1 code path? |
 Send message Joined: 20 Mar 08 Posts: 108 Credit: 2,607,924,860 RAC: 0  
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I'd venture a guess at Windows 10 auto-updating drivers. Have a look at this thread: https://milkyway.cs.rpi.edu/milkyway/forum_thread.php?id=4101  
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Send message Joined: 4 Feb 11 Posts: 86 Credit: 60,913,150 RAC: 121
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I reinstalled my video driver using a clean install, and that seems to have fixed the problem. |
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Send message Joined: 4 Feb 11 Posts: 86 Credit: 60,913,150 RAC: 121
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The problem is back. I have had to disable GPU work for MilkyWay@home for now. |
 mikey Send message Joined: 8 May 09 Posts: 3265 Credit: 518,708,605 RAC: 702  
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The problem is back. I have had to disable GPU work for MilkyWay@home for now. Did Windows reinstall it's own drivers again? |
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Send message Joined: 4 Feb 11 Posts: 86 Credit: 60,913,150 RAC: 121
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There is no sign that Windows 10 reinstalled any driver. Since other projects' GPU work still is being turned in and successfully validating, I would think that the problem is either a bug exists in the driver, or a new optimization in the driver exposed a previously undetected bug in the GPGPU software client (the latter has happened with Folding@home). |
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Send message Joined: 20 Mar 08 Posts: 108 Credit: 2,607,924,860 RAC: 0
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However it got there, you are using a brand new nvidia driver that is known to have caused failures in MW. http://milkyway.cs.rpi.edu/milkyway/forum_thread.php?id=4101&postid=66257
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mikey Send message Joined: 8 May 09 Posts: 3265 Credit: 518,708,605 RAC: 702
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However it got there, you are using a brand new nvidia driver that is known to have caused failures in MW. I'm using the same driver here and it seems to be working just fine for my Nvidia 750Ti gpu's. Now I JUST put them on today but so far no bad workunits for either gpu. I am knocking on wood!!! |
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Send message Joined: 4 Feb 11 Posts: 86 Credit: 60,913,150 RAC: 121
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I just filed a bug report with Nvidia over this issue. |
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Send message Joined: 4 Feb 11 Posts: 86 Credit: 60,913,150 RAC: 121
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Either a new driver or the new application version fixed the bug. |
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