Charm++ parallel programming system

[Nicolas Bock <nicolasbock AT gmail.com>]

I must be doing something completely wrong, but charmdebug goes up in flames with an exception:

ServThread terminated

Finished running parallel program

java.net.ConnectException: Connection refused

        at sun.nio.ch.Net.connect0(Native Method)

        at sun.nio.ch.Net.connect(Net.java:465)

        at sun.nio.ch.Net.connect(Net.java:457)

        at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:639)

And I can run charmrun on the executable fine, either with rsh or ssh.

Thanks,

nick

On Mon, Jul 29, 2013 at 1:55 PM, Jonathan Lifflander <jliffl2 AT illinois.edu> wrote:

Normal GDB backtraces are not very useful when the system is
delivering a message and fails. To ameliorate this, we have developed
a tool called CharmDebug which allows you to inspect the queue on each
processor, change the order of delivery, etc.

Here is the link to the research area on our website, where you can
find many papers:

https://charm.cs.illinois.edu/research/parallel_debug

The software is available to download on the website under the software section.

I'm not exactly sure how a missing extern (which should be caught at
link time), ended up producing a runtime error. Could you provide a
little more information?

Thanks,

Jonathan

On Mon, Jul 29, 2013 at 2:41 PM, Nicolas Bock <nicolasbock AT gmail.com> wrote:
> It turns out that this particular problem was caused by a missing "extern
> module ...;" statement in one of the interface files. As a feature request:
> it would be great if the compiler caught omissions like these.
>
> Thanks,
>
> nick
>
>
> On Mon, Jul 29, 2013 at 12:13 PM, Nicolas Bock <nicolasbock AT gmail.com>
> wrote:
>>
>> Hi,
>>
>> I keep getting segfaults deep inside the RTS. Unfortunately I haven't
>> found a good way yet to connect the backtraces to my code, since the
>> callstack doesn't actually involve anything from my code. Is there a
>> recommended technique to debug these kinds of situations?
>>
>> Thanks,
>>
>> nick
>>
>
>

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