[mesa-users] Discrepancy in wd_cool_0.6M, version 5527

Grant Newsham newshamg at gmail.com
Tue Nov 19 17:13:02 EST 2013


I also get the same failure - this used to fail a few releases ago - then
started to work on a subsequent release and now fails again.

So do several others of the test suite - 1M_thermohaline is one of them for
instance.

Grant



On Tue, Nov 19, 2013 at 8:51 PM, Ed Brown <ebrown at pa.msu.edu> wrote:

> More on this…
>
> On Mac OS 10.8.5, SDK 20130408, 8 threads:  v5527 stopped with dt <
> min_timestep_limit after model 2450 (208 retrys, 59 backups).
> v5596 stopped with dt < min_timestep_limit  after model 1830 (33 retrys, 0
> backups).
>
> Ed
>
>
>
>
> On 19 Nov, 2013, at 14:08, Dean Townsley <Dean.M.Townsley at ua.edu> wrote:
>
> > To add to Broxton's report...
> >
> > For me with r5596 MESA/star stops at model 1851 when it reaches the
> max_number_retries of 400, instead of the dt limit like for r5527.
> >
> > Dean
> >
> >
> > On 11/19/2013 12:14 PM, Broxton Miles wrote:
> >> Hey everyone,
> >>
> >> I actually ran into this problem as well. I'm using our Linux cluster,
> which uses centros 5.5, with SDK version 20130408.
> >>
> >> So I checked out clean versions of 5596 and 5527 and reran the test
> suite problem and got the following results: v5527 failed at the same point
> as Dean and Naveh's runs, and version 5596 actually failed as well at model
> number 1851.
> >>
> >> Broxton
> >>
> >>
> >> On Tue, Nov 19, 2013 at 11:56 AM, Bill Paxton <paxton at kitp.ucsb.edu>
> wrote:
> >> Hi Dean,
> >>
> >> Thanks.  I'll ask you the same question that I posed to Naveh -- what
> happens when you try wd_cool_0.6M with the current version (5596)?   Is the
> problem still with us?
> >>
> >> -Bill
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> On Nov 19, 2013, at 9:38 AM, Dean Townsley wrote:
> >>
> >>> Hi Naveh, Bill,
> >>>
> >>> Just as a point of information, I tried wd_cool_0.6M in MESA version
> 5527 and got the result that Naveh describes: it stops sometime between
> step 580 and 590 (it is set to print every 10 steps) with the dt <
> min_timestep_limit=1e-6.
> >>>
> >>> I'm using SDK version 20130408 on an intel Linux machine, Ubuntu 13.10.
> >>>
> >>> I know that doesn't help fix anything, but at least it confirms the
> issue on my architecture.
> >>>
> >>> Dean
> >>>
> >>>
> >>> On 11/18/2013 05:29 PM, Bill Paxton wrote:
> >>>> Hi Naveh,
> >>>>
> >>>> Here are some results for comparison.
> >>>>
> >>>> When I ran the test suite before releasing 5527 (on my 12 core mac
> using gfortran from the MESA_SDK), wd_cool_0.6M finished okay after 7.5
> minutes with 133 retries, 24 backups, and 3194 steps.
> >>>>
> >>>> Similarly, before doing release 5271, wd_cool_0.6M finished okay
> after 6.9 minutes with 174 retries, 50 backups, and 3105 steps.
> >>>>
> >>>> For the current release, 5596, wd_cool_0.6M finished okay after 4.89
> minutes with 18 retries, 0 backups, and 2643 steps.
> >>>>
> >>>> The various inlist_wd_cool_0.6M's are essentially identical except
> for the most recent in which I added this:
> >>>> smooth_convective_bdy = .false.
> >>>>
> >>>> Of course as Aaron mentioned, there may have been changes in
> controls.defaults too.
> >>>>
> >>>> You should also check what you get with 5596 and let us know.
> >>>>
> >>>> -Bill
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>> On Nov 18, 2013, at 3:04 PM, Aaron Dotter wrote:
> >>>>
> >>>>> Hi Naveh,
> >>>>>
> >>>>> The first thing you ought to do is compare the default settings, see
> mesa/star/defaults/[controls.defaults,star_job.defaults], between 5271 and
> 5527.  Anything not set explicitly in the test_suite inlists will use the
> default values.  Any differences in the default values may be responsible
> for the results you've found, even though the WD inlists themselves are the
> same.  If not, it will require some deeper investigation.
> >>>>>
> >>>>> Aaron
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> On Sun, Nov 17, 2013 at 5:04 AM, Naveh Levanon <
> naveh.levanon at gmail.com> wrote:
> >>>>> I've noticed a discrepancy in running wd_cool_0.6M from the test
> suite.
> >>>>> In my previous version, 5271, with no changes to test controls, the
> WD cools over 10Gyr (about 2800 steps) until reaching the Teff lower limit
> set for it.
> >>>>> In version 5527, with the same controls, evolution stops abruptly
> after about 1.4Gyr (580 steps), with the timestep becoming too small. I
> couldn't find anything suspicious in the profiles to explain this behaviour.
> >>>>> I removed and reinstalled both versions to ensure this wasn't my
> meddling with the test, and the discrepancy repeats itself.
> >>>>>
> >>>>> Naveh
> >>>>>
> >>>>>
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