Description version 0.01 created on 12 july 2011 by Skybuck Flying:

Hello,

Skybuck's RAM Test version 0.07 is now available at the following link, in either winrar form or loose files (3):

File:

http://www.skybuck.org/CUDA/RAMTest/SkybuckRAMTestV007b.rar

Folder:

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

What the test does is the following:

It creates 20.000 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: 25.0870683593750000
CPU execution time in seconds   : 11.8696194628088207

Cuda memory transactions per second:  63777878.5898704829000000
CPU memory transactions per second : 134797918.7549603890000000

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

Note: this test requires 611 megabyte (640.000.000 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 (just the 4 lines as above is enough/fine).

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

You can also e-mail results to:

skybuck2000@hotmail.com

Bye,
  Skybuck.