View Full Version : Mapped and Direct modes

02-15-2011, 02:38 PM
Hi all,
I need to asked about the oclBandwidthtest example, please, I have some parts that I don't understand in it... First, what is the difference between Direct and Mapped modes? and where can I find explanation or more details about them?
The second thing that when I try to apply the Pinned memory with mapped mode in a project of mine, in order to improve the data transfer time from host to device, I find that the transfer time might become better but the processing time on the GPU afterwards reduces dramatically!!!! is this normal or there is any reason for this?

02-16-2011, 12:44 PM
any help? I'm sorry if my question is not clear as I am really confused and some how a OpenCL beginner...

02-16-2011, 03:46 PM
You may get a response if you ask on NVidia's forums, since the test, I believe, was written by them.

02-17-2011, 12:46 AM
Thanks David but unfortunately they are not replying too :(

02-17-2011, 05:00 AM
Many of the work groups are in Barcelona right now, as such responses will be delayed this week.