Openpiton manychip simulations

[makksi]

I'm currently running some Openpiton testcases using manycore model.

In manycore you can choose the tile size configuration for example a 3x3 uniform tiles.

I know Openpiton is suitable to build a manychip model, but I didn't find in the documentation a reference to a simulation model for that.

I woudl like for example to run a system made by 4 chips each one is composed of 4 tiles of OpenSparc T1 or Ariane.

Is there a way to do that just with an appropriate "sim" script build/run switch?

Thanks

[Jonathan Balkind]

You're right that the code on github doesn't have multi-chip. To do this with minimal changes, one would want to take advantage of Coherence Domain Restriction (https://dl.acm.org/doi/10.1145/2830772.2830832 and known in the code as CSM) which is at present only supported in the OST1. Otherwise you'd have to modify the L2 to have some knowledge of chip IDs without this feature. The other main RTL changes would just be instantiating multiple chips and routing traffic between their L1.5s and L2s.

Thanks,

Jon

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