cudaMemGetInfo() takes several seconds on some setups

Hi!

I just noticed that a cudaMemGetInfo() call takes serveral seconds (~5-10 s) on some setups and while it is very quick on other setups. All systems are running Windows 7 x64 and CUDA 5.5.

Slow:

  • Dual GeForce GTX 680

Quick:

  • Single GeForce GTX 680
  • Dual GeForce GTX 285
  • Sinlge GeForce GTX 580

Any ideas what the problem mighty be? Is this a known problem?

Maybe this problem is related to changes in the driver. We might have updated to a new driver around May 24th. Since then, this function is significantly slower than before.