Getrf and Getrf_qrf test fails for ptg_to_dtd module
In getrf and getrf_qrf, the kernel getrf_rectil is called. The behavior of this kernel is that, multiple threads will call it and a barrier inside it will be satisfied when all the threads reach that point.
In ptg_to_dtd module the dependencies are created based on what data each task is using in each flow. In these two cases(getrf and getrf_qrf), when hook of multiple getrf_rectil are made a dependency is created between them as they use the same data. Now the subsequent call after the first one, needs to wait until the first call to getrf_rectil is completed. But, in this case the first call blocks as getrf_rectil is expecting more threads to join a barrier inside, where DTD will not activate and execute the others before the first one is complete. What we observe here is the behavior of atomic_write.
Solution: Implement logic for atomic_write in DTD and add flags in PTG for flow to indicate atomic_write behavior.
Comments (4)
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reporter -
@rhoque_icl any progress ?
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- removed version
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Tried to replicate that issue but it appears to not be present anymore (?)
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After discussion: The simplest solution now would be to get a special flag from PTG side to treat parallel write tasks as read tasks.