Size of shared memory

Accelerated Computing CUDA CUDA Programming and Performance
1

Hello,

I’m using a Geforce 8800 GTX with CUDA 1.1, and I would like to understand a problem with the shared memory.

This GPU use 16 Ko of shared memory but when I want to create an array of unsigned char in the shared memory, a CUDA ERROR appears.

cudaError_enum at memory location 0x0012ef08.

I would like to have an array of 72416sizeof (unsigned char) bytes (11584 bytes) but it crashes.
However if I reduce the array size (<4000 bytes) it runs. :dry:

Please help :blink:

2

Do not forget that this memory is also used to store things like arguments, …

3

Yes, I have activated the Verbose mode and I can read that the shared memory used for my kernel is 11608 bytes so I don’t understand