Code

The current changeset that is being used is 1290:c8607dac4238.

It is located at /home/ehansen/PulsedJet_2.5D/astrobear3.0

Please note that there are changes to problem.f90 in this directory that have not been committed to the repository.

Fiducial Parameters

global.data​

physics.data​

solver.data​

problem.data​

Key Parameters

Resolution: 42X420 + 7 AMR

cfl_vars = .8, .4, .1

qTolerance            = .10,.25,.40,1d30,1d30,1d30,1d30,1d30

iThreaded             = -1

InterpOpts            = 0,0,0,0,0,0,0,0,0,0,0,0,0

buffers                 = 4, 4, 4, 4, 4, 4, 4, 4

MinDensity       = 1d-4[

MinTemp          = 1d-10

iDensityProtect  = 2

iMomentumProtect = 2

iPressureProtect = 2

Parameter Tests

	Fiducial	5 AMR	3 AMR	Buffer increase	Density Refinement
% root steps restarted	0.14%
Time to frame 1	1min
Last frame	50
Time for last frame	4.5 hours
Est. time to completion	12 hours
Number of processors	256
Location	/bamboodata/bliu/Eddie/PulsedJet_2.5D/Fiducial/
Other deviations from Fiducial
Last Frame / movie link

Resolution Tests

The idea here is a bit different than adjusting data file parameters to see what works best. Here, I am simply lowering the number of levels while keeping the number of processors constant. This is to see how having a larger root grid might help performance when running on many processors.

There is density gradient refinement to level 3, and cooling time threshold refinement to level 7 (based on fiducial run). qTolerance changes for each run to keep this consistent. For example, the level 6 run has

qTolerance = .25, .40, 1d30, 1d30, ...

so that there is the same refinement criteria at the same effective resolution. For level 5…

qTolerance = .40, 1d30, 1d30, 1d30, ...

The level 4 and level 3 runs have the same qTolerance…

qTolerance = 1d30, 1d30, 1d30, 1d30, ...

	Fiducial	6 AMR	5 AMR	4 AMR	3 AMR
% root steps restarted	0.00%	0.00%	0.00%	0.00%	0.00%
Time to frame 1	2 min	2 min	4 min	12 min	35 min
Last frame	10	10	10	10	10
Time for last frame	35 min	62 min	75 min	115 min	3.6 hr
Number of processors	1008	1008	1008	1008	1008
Location	kraken	kraken	kraken	kraken	kraken
Other deviations from Fiducial	N/A	qTolerance (see above)	qTolerance (see above)	qTolerance (see above)	qTolerance (see above)
Last Frame / movie link

There is no estimated time to completion for these runs, because they were submitted with the intent of only going to 10 frames. In other words, these jobs did complete as far as the code is concerned. I was mainly interested in the run times and the number of restarts.

As you can see from the table, the restarts seem to have disappeared. Restarts could still be triggered at later frames, but at least this particular set of parameters helped with the first 10 frames. In conclusion, it looks like it will be okay to run with 7 levels with these parameters.