Warning about Remote Desktop use !
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Number crunching :
Warning about Remote Desktop use !
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 skgiven Send message Joined: 23 Apr 09 Posts: 3968 Credit: 1,995,359,260 RAC: 0 Level  Scientific publications       |
I have remotely connected to a number of computers that have GPU's crunching for GPUGrid. On every occasion the GPU is reported as no longer in a working condition. Usually the running tasks crash! The only way to resolve this is to log on locally, shut down Boinc and then Start Boinc again. On one occasion I had to restart the system. Remotely connecting to a computer that does not have a GPU does not cause a problem, just computers with GPUs that crunch. |
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Send message Joined: 11 Jul 09 Posts: 1639 Credit: 10,159,968,649 RAC: 351 Level  Scientific publications
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This has been a problem with Microsoft's Remote Desktop implementation since the very beginning of CUDA - I believe it unloads the NVidia driver and substitutes one of its own, which is not CUDA-aware. However, people have reported success with other remote access implementations, such as the various flavours of VNC. |
 Send message Joined: 18 Aug 08 Posts: 8 Credit: 127,707,074 RAC: 0 Level  Scientific publications
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I use the TeamViewer, free for private use and not commercial, it's good to remotely control Windows systems. 
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Send message Joined: 5 Jan 09 Posts: 670 Credit: 2,498,095,550 RAC: 0 Level  Scientific publications 
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I have remotely connected to a number of computers that have GPU's crunching for GPUGrid. I get this problem with GPUGRID even when switching between user accounts despite all other projects having no problem. Radio Caroline, the world's most famous offshore pirate radio station. Great music since April 1964. Support Radio Caroline Team - Radio Caroline |
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Send message Joined: 10 May 10 Posts: 2 Credit: 3,665,106 RAC: 0 Level  Scientific publications
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The big problem with fast user switching is that GPUGRID tasks immediately end with computation errors, and then more work is fetched, then each new task fails as well. I quickly use up my daily quota and am out of work for a day. Isn't there any way for GPUGRID tasks to detect this condition and/or just go to sleep when CUDA is not available? |
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Send message Joined: 19 Aug 10 Posts: 19 Credit: 830,540 RAC: 0 Level  Scientific publications
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think windows remote desktop loads generic vga driver for the session and that crashs the cuda aps, VNC viewer ftw :) 
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Send message Joined: 2 Jul 10 Posts: 8 Credit: 55,018,948 RAC: 0 Level  Scientific publications
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I use TightVNC with about 98% success rate. Somtimes from the master PC, I have to shut done Boinc on the master to remote into other computers. Also I've had multiple failures in a row in quick sucession but have never been limited to 2 WU's in a day even thogh "Messages" said I had reached my limit of 2. Maybe the server needs to catchup or .... |
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Send message Joined: 31 May 10 Posts: 48 Credit: 28,893,779 RAC: 0 Level  Scientific publications
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UltraVNC is what I use for remote connection. |
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Send message Joined: 27 Sep 08 Posts: 3 Credit: 10,699,899 RAC: 0 Level  Scientific publications
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VNC works very well - it won't unload the NVIDIA drivers. TightVNC is what I use. |
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Send message Joined: 17 Nov 10 Posts: 1 Credit: 5,112,981 RAC: 0 Level  Scientific publications
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UltraVNC is great. I use it as well. I've also got Logmein installed, but I've not tried it on my gpu cruncher yet, *cross fingers* |
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