Interface channel usage if tasks on same tile

[DemoniacMilk]

Due to running into problems with the number of chanends available on one of my tiles, I combined two interfaces to a single interface.

The setup is something like the following, with <--n--> representing n interface connections between the tasks. All tasks run on the same tile.

Client A <--n--> Server <--n--> Client B

I reduced n by 1, and expected four channels to be freed (2x a chanend on both server and client side) but the report told me that only additional 2 chanends are available now.

Do Tasks on the same tile connect to the same chanend?

[andrewxcav]

Yes.

Is it easy for you to place the server on another tile? You should see an additional 2n chanends vs. the one-tile approach (if my math is correct).

While I am not 100% sure on the implementation, here is how I like to think about it:

Picture the 2 tile case as having input and output registers to the channel, vs. the single tile mode where the input and output registers can be the same physical register.

[DemoniacMilk]

Ye that's how I assumed it to work on seeing the numbers change. Thank you for confirming!