Re: [Gems-users] Opal: Lack of forward progress detected

[Dan Gibson <degibson@xxxxxxxx>]

Francesco,
You should give a lot of scrutiny to your Ruby
modifications. You can start by running Ruby's random tester for
awhile. It is possible that your additions/modifications break Ruby
when there are multiple concurrent requests from each processor in the
memory system (i.e. with opal or the tester) but not when each
processor limits itself to a single request (i.e. Simics+Ruby only).

Regards,
Dan

On Mon, Jan 19, 2009 at 5:11 AM, Francesco Panicucci <panasa1@xxxxxxxxx> wrote:

Hi all,
I'm using Opal to simulate several protocols and architectures and now I need to test some custom protocols we developed, but the simulation always stops and Opal shows the error message "Lack of forward progress detected".
I have found a post talking about this issue here:
https://lists.cs.wisc.edu/archive/gems-users/2005-June/msg00032.shtml

Yes, I changed some files in Ruby to customize the profiler, is it a problem? Can't Opal run if Ruby files have been modified?
The Ruby only simulation runs perfectly.

bye
francesco

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