Device 0 and emulation

Accelerated Computing CUDA CUDA Programming and Performance
1

Hi All,

When I run device query I get:

There is one device supporting Cuda, Device 0.

I read somewhere that Device 0 is emulation mode, is that true? Or am I truly running these programs on a real nvidia device?

Sorry about the beginner-type question, I just need to verify what I read.

2

The device indices start at zero, so it’s probably running on the device. If you don’t compile with host emulation, it should be running on the device. Run a benchmark if you don’t trust it; for simple things (incrementing every element of a large array) the GPU is much faster.