Description version 0.02 created on 21 july 2011 by Skybuck Flying:

Hello,

Skybuck's RAM Test version 0.10 is now available at the following link, in either winrar form or loose files (3):

File:



Folder:

http://www.skybuck.org/CUDA/RAMTest/

What the test does is the following:

It creates 4.000 blocks. Each block has 8.000 elements. Each element is a 32 bit integer (4 bytes).

Each block has one execution thread.

The execution thread "travels" through the elements in a random fashion. (RAM read test).

It stores/writes the last element it processed in the BlockResult[ BlockIndex ] to verify if it indeed did any processing at all.

This test is performed on GPU and CPU. (On the CPU only one thread/core is used for now, perhaps a future test will include multi-threading).

The timing and performance results are then displayed at the bottom.

The GT 520 gpu and the AMD x2 3800+ dual core cpu single thread performed as follows:

Kernel execution time in seconds: 3.4778776855468750
CPU execution time in seconds   : 1.4483863172554055
Cuda memory transactions per second: 92010136.3339584907000000
CPU memory transactions per second : 220935530.9337487070000000

Conclusion: CPU's single thread is twice as fast as GPU.

Note: this test requires 123 megabyte (128.000.000 bytes) to be free/available on CPU and GPU. 

I would be very much interested in how this test performs on your system/cpu/gpu.

So if you do run this test on your system, please post the results below in either text form (screen text grab) or a screenshot (resize the ms-dos window).

(Also additional info about system would be nice too but is not required ;))

You can also e-mail results to:

skybuck2000@hotmail.com

Additional note:

This test program assumes compute capability 2.0 present and will load CudaMemoryTest.ptx.

It's possible to replace this file with one of the other two, perhaps that might work for example:

Copy CudaMemoryTestCompute10.ptx over CudaMemoryTest.ptx to give compute 1.0 a try.

Bye,
  Skybuck.