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Why are problems occurring running exercisers on more than two graphics devices?

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Why are problems occurring running exercisers on more than two graphics devices?

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Running exercisers on more than two graphics devices simultaneously may result in one or more of the exercisers terminating due to problems getting resources such as semaphores or shared memory. It is also possible that the graphics exercisers will execute correctly but other exercisers such as the CPU exerciser will fail if started while more than two graphics exercisers are running. This problem can be corrected by modifying the following kernel parameters and rebuilding the kernel: – The semmini parameter should be increased by 64 – The semmns parameter should be increased by 128 In addition, the /etc/X11/Xscreens file (where is the number of the X server — e.g. 0, 1, 2, or 3) should be modified to add the following: ServerOptions GraphicsSharedMemorySize 0xc00000 These lines should be added just above the “Screen /dev/crt” line. If a “ServerOptions” line already exists in the file, another “ServerOptions” should not be added, but, rather, the “GraphicsSharedMemory

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