Opened 8 years ago

Closed 17 months ago

#114 closed defect - convergence (wontfix)

number of iterations to converge sim differs on different platforms

Reported by: Gary J. Ferland Owned by: nobody
Priority: major Milestone: C13 branch
Component: etc Version: trunk
Keywords: Cc:

Description

some sims use the iterate to convergence command and require a different number of iterations on different platforms. These may be borderline cases where the convergence tests are on the edge of passing. The effect is that some monitored quantities differ by more than the default 5% when the number of iterations is different.

These sims have two monitors, an upper and a lower limit, to check that the number of iterations is with the known range.

sims with the problem are: blr_n09_p18_Z20 blr_n13_p18 blr_n13_p18_Z20 blr_n13_p22_Z20

Change History (1)

comment:1 Changed 17 months ago by peter

Resolution: wontfix
Status: newclosed

The convergence has been greatly improved in r8534. However, it can never be guaranteed that the number of iterations will always agree on all platforms. That is an unattainable goal. If we think that r8534 is not yet sufficient, we should create a new ticket and state an attainable goal in there. Closing this ticket as a won't fix since the goal is unattainable.

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