[alsa-devel] ASoC: mmap or read/write?

Hi,

I'm writing an alsa application for recording & playing 16 channel audio.

The application is intended to run on an embedded platform & the resources are highly constrained. My application is not performing well with read/write methods. I'm considering using mmap but not able to get the right documentation or start, so I want to know whether mmap really offers any advantages or not.

Does the mmap method has any advantages over read/write? Is there any thumb rule to decide when to use mmap or read/write?

-Prasant