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Asked: 2026-06-17T10:43:04+00:00

I’m trying to write an OpenCL function that would be executed inside PostgreSQL. To

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I’m trying to write an OpenCL function that would be executed inside PostgreSQL. To do this i create DLL from my OpenCL code and link it to postgres using User-Defined Function mechanism. Everything goes well until clGetPlatformIDs is called. Function returns error -1001, which I read that indicates problem with finding OpenCL drivers.

I’ve tried to compile the same code(i had to remove some postgres magic) to exe and runed it with success – all platforms were found correctly, so I assume that i have correctly set up SDK and drivers.

I am runing PostgreSQL 9.1 on windows 7 x64. I am also using Nvidia CUDA SDK 4.2 with Visual Studio 2010 and running my code on GeForce GTS 450.

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  1. Editorial Team

    It’s MSFT’s problem with Windows, Services, GPUs, Security and device drivers.

    You can’t run PostgreSQL as a service on Windows AND see any GPUs. You are hitting Session O Isolation which does NOT allow any ‘graphics’ device access from a Windows Service. You can start PostgreSQL as a process (not a service) or put the server on Linux.

    See http://www.scribd.com/doc/58343489/Windows-Session-0-Isolation-Impact-on-GPU-as-Service

    Also there are other important reasons to run on Linux, as Windows will want to reboot your GPU if the screen is not accessed before the timeout period. See
    http://msdn.microsoft.com/en-us/library/windows/hardware/ff570088%28v=vs.85%29.aspx

    NVida have a non-graphics GPU device driver for specific Tesla cards on Windows. These cards don’t have any video output. So they aren’t considered to be graphics device drivers.

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