Nauman,
It depends on the cache coherence protocol whether messages on certain
virtual channels can get out-of-order. When a buffer is unordered, the
tester will allow messages to bypass eachother on a point-to-point link.
For instance, some protocols will deadlock if a GET request moves ahead of
a PUT request to the directory, which could happen if you set the requests
queue to be unordered.
Look at the trace closer. It is not always easy to tell what event causes
the deadlock, but through some persistence, you should find it.
Brad
On Wed, 30 Mar 2005, Nauman Rafique wrote:
> I am wondering how much difference does it make if we set some of the buffers to
> be unordered?
> I have set a couple of buffers to be unordered, and Tester is reporting a
> deadlock. I am not really sure why deadlock occurs because from the trace,
> everything looks fine. And I am simulating with only 1 processor.
> If I set the buffer to be ordered, it works fine.
>
> Thanks.
> --
> Nauman
>
>
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