[MITgcm-devel] FW: [MITgcm-support] Adjoint model runnning?

[Patrick Heimbach]

It's obvious what's going on.
He has some extensive recomputations going on,
which explains the factor 100
(it has nothing to do with the number of controls).

The dependency of the code size on nchklev_1
is perfectly OK (innermost checkpointing loop
held in memory).

Don't have his e-mail address.

-p.



>>-----Original Message-----
>>From: mitgcm-support-bounces at mitgcm.org 
>>[mailto:mitgcm-support-bounces at mitgcm.org] On Behalf Of Hong Zhang
>>Sent: Thursday, September 25, 2003 9:10 AM
>>To: mitgcm-support at mitgcm.org
>>Subject: [MITgcm-support] Adjoint model runnning?
>>
>>
>>The document  says generally adjoint running is about
>>5 times slower that forward model.
>>But in my case ( exp0, and only one indenpdent variable),
>>it seems 100 times slower.
>>The total size of the program (shown by 'top' ) seems 
>>dependent on nchklev_1. Here are several cases: nchklev_1=36, 
>> SIZE=31M
>>         144,       49M
>>         360,	    85M
>>        3600,      623M
>>but for each case, the Resident Set Size (RSS or RES shown by 
>>'top') is only 9M. Can I load more part of the program into 
>>Resident memory so it run faster? Have you ever met such 
>>problems? any suggestion?
>>
>>thank you,
>>hong

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