[daip] FRING memory requirements

[Ingyin Zaw]

Hello,

I checked setapmax. It was set to 528 Mbytes. I changed it to the maximum 
allowed:
>setmaxap(0)
AIPS 1: SETMAXAP: current max dynamic AP is  6144.000 Mbytes
AIPS 1: SETMAXAP: allowed range is  20 to  6144 Mbytes

I still get the same memory error as below.

The fring parameters I've set (which are not defaults) are:
calsour '2145+067'
refant 6
solint 0
aparm 3 0 0 0 2 0
dparm 3 1 1 4.1 0

(docalib -1; flagver 0; doband -1).

Thanks,
Ingyin



On Wed, 6 May 2009, Eric Greisen wrote:

> Ingyin Zaw wrote:
>>  Hello,
>>
>>  I'm trying to run FRING with aparm(5)=2 to solve for multiband and single
>>  band delays on a file with 256 channels and 8 IFs (experiment BK114A). I
>>  get the following error.
>> 
>> FRING1:  Task FRING  (release of 31DEC09) begins
>> FRING1:  You are using a non-standard program
>> FRING1:  Doing no flagging this time
>> FRING1:  Selecting the data
>> FRING1:  Dividing data by source flux densities
>> FRING1:  Determining solutions
>> FRING1:  Doing Least Squares fits for multi- and single-band delays
>> FRING1:  Writing SN table    1
>> FRING1:  Time=   0/ 02 28 14, Polarization = 1
>> FRING1:  QINIT: did a GET  of      5120 Kwords, OFF   11963214967809
>> FRING1:  FRNSRC: MEMORY TOO SMALL FOR SPECIFIED FFT SEARCH
>> FRING1:  REDUCE DELAY AND/OR RATE WINDOW OR AVERAGE IN
>> FRING1:  FREQUENCY OR USE A SHORTER SOLINT
>> FRING1:  Purports to die of UNNATURAL causes
>> FRING1:  rglinux9 31DEC09 TST: Cpu=      0.9  Real=      1  IO=        86
>>  AIPS 1: Resumes
>>  AIPS 1: RETURN CODE      2 RECEIVED: STOPPING
>>
>>  I have set dparm 3 1 1 4.1 0. It seems strange that it fails for such a
>>  small search window. It fails even when the search window is set to 0.1
>>  nsec and 0.1 mHz. I'm not applying any calibrations or bandpass.
>>
>>  I'm running 31 DEC 09, 64 bit AIPS on a machine with following
>>  specifications:
>>  Linux rglinux9.cfa.harvard.edu 2.6.18-128.1.1.el5 #1 SMP Mon Jan 26
>>  13:58:24 EST 2009 x86_64 x86_64 x86_64 GNU/Linux
>>
>>  I have seen the same problem on 31 DEC 09, 32 bit AIPS as well on an
>>  experiment with 512 channels and 8 IFs (BB242D).
>>
>>  I have made a FITS file of only the source I used for FRING for testing.
>>  It's available by ftp from cfa-ftp.harvard.edu,
>>  User = anonymous, password = <youremailaddress>.
>>  The file is located at: incoming/lincoln/BK114A_2145.FITS
>>
>>  Please let me know what I can do to be able to run FRING with aparm(5)=2.
>
> Needless to say FRING should not do this - I note that it only asked for 20 
> Megabytes of AP memory.  It is supposed to ask for what it actually needs if 
> you allow it to do so.  Have you run SETMAXAP with a small limit?  I would 
> recommend set your max AP to 0.5 or 1 Gbyte on your 64-bit computer.
>
> If that does not work, send me your inputs and we will fetch the file and 
> look at the problem.
>
> Eric Greisen
>
>