Buffer ports can be addressed in a linear or circular manner. In linear
addressing mode, data is addressed linearly and has no wrap around. In circular
addressing mode, data is addressed circularly and has wrap around. Kernels with
margin in the same tile are recommended to use circular buffer ports. Port
connections with non-zero margin require copying the margin data at the consumer
port after the consumer kernel returns. However, if the producer and consumer are on
the same core and you use circular buffer ports, then margin copy can be avoided,
which improves performance. Data in a regular buffer port may be accessed with a
pointer obtained from the
data() API, or using
linear or circular iterators. Linear iterators have lower overhead than circular
- Circular addressing mode is supported only in one dimension buffer ports.
- The iterator to access the data in a circular buffer port must be a circular iterator.
- Circular buffer port can only be declared in the function prototype.