[Assignment6] Meaning of error message about "Pipeline stall" in 'conv' integration test

[ki6090]

Hello, I already passed all unit test and matmul, matrix_add, raw_hazard integration test.

But only conv test fails...

Could I get some hints about the meaning of pipeline stall error message? ,,,

Other error message shows the different results and I solved with that messages, but this message cannot figure about my code errors...

Thanks for reading!

[JongyCysec]

Sadly, I encountered same problem too...

[woojinnn]

• After the Execute module (which is outer module of MeshWithDelays module) finishes its execution, it sends rob_id to reservation station module to notify that Execute module finished its execution. If Reservation station doesn't receive the fired rob_id more than 10000 cycles, the Reservation Station classifies it as stalled and throws an error.
• Probably your implementation isn't sending ready signal properly, and it is blocking the execution of next command. As a hint, matmul, matrix_add, and Raw_hazard testcases send DIM*DIM (where DIM indicates the Mesh size) matrices to MeshDelays module, whilst the conv testcase sends partial inputs. (For instance, 5*5 matrices, etc...) How about checking your counter management logic etc...?

[ki6090]

Thanks for kind answer!!

[minseongg]

We will prepare the reference waveform for debugging purpose ASAP. Sorry for the inconvenience.

[JongyCysec]

@woojinnn
I've examined through sub-modules where stall can happen.
Considering the complexity of the design and hardness of debugging, it would have been quite hard for me to debug own myself without your sincere help.

Thanks to your explanation, I can solve the problem !!

[woojinnn]

@JongyCysec Congrats!

[minseongg]

We have added reference waveform files for integration tests (kaist-cp/hazardflow@53b99dd).

For more details, please refer to #71 (comment)!

[ki6090]

Thank you!! I appreciate your help.