Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Channels vs looped memory accesses

With respect to channels, I'm trying to understand why the "channelized" version of simple single-stream I/O is beneficial over looped accesses to memory. If I have a single work-item kernel or work/...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Sean,

When you say the preferred implementation should follow Fig. 6 (single work-item execution with unrolled inner loop using shift registers) vs. Fig. 7 (an NDRange implementation with outer loop distributed among work-items) why is this the case? Is this a programmability consideration? Or are there performance implications?