[petsc-users] KSP breakdown in specific cluster (update)

[Jed Brown]

TAY wee-beng <zonexo at gmail.com> writes:

> On 24/4/2014 9:41 AM, Barry Smith wrote:
>>    The numbers like
>>
>>          sum = 1.9762625833649862e-323
>>
>>          rho = 1.9762625833649862e-323
>>
>>          beta = 1.600807474747106e-316
>>          omega = 1.6910452843641213e-315
>>          d2 = 1.5718032521948665e-316
>>
>>     are nonsense. They would generally indicate that something is wrong, but unfortunately don’t point to exactly what is wrong.
>
> Hi,
>
> In that case, how do I troubleshoot? Any suggestions?

You have memory corruption.  Use Valgrind, perhaps compiler checks like
-fmudflap, and location watchpoints in the debugger.
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