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Re: [Bug-gsl] ode-initval2 testsuite failure
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From: |
Frantisek Kluknavsky |
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Subject: |
Re: [Bug-gsl] ode-initval2 testsuite failure |
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Date: |
Wed, 23 Jan 2013 18:52:27 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130110 Thunderbird/17.0.2 |
logging at key points shows:
msbdf_apply of order 4
finish msbdf_apply
step accepted
msbdf_apply of order 4
Stability enhancement heuristic for msbdf - decrease order to 3
finish msbdf_apply
step rejected
msbdf_apply of order 3
finish msbdf_apply
step rejected
msbdf_apply of order 3
msbdf_eval_order /* Consider and execute order change for next step */
decreases order to 2
finish msbdf_apply
step rejected
msbdf_apply of order 2
4-2>1 => sanity check kills the simulation
It seems like reproducibility of this behaviour depends on cpu
architecture, fpu settings, libm, floating point related compiler
flags, maybe even weather or moon phase. I can provide a core dump or
longer and more detailed logs in case of good weather. Feel free to ask
for specific details.
Fero