[MITgcm-support] Model hangs intermittently on Mac

[Christopher L. P. Wolfe]

Switching to MPI from OMP seems to have solved the problem for now. Hopefully it was due to some issue with the specific OMP runtime environment I was using and not a sign of some subtle error in the model.

Cheers,
Christopher


On Feb 28, 2013, at 11:01 AM, Christopher L. P. Wolfe <clwolfe at ucsd.edu> wrote:

> 
> Hi Jody,
> 
> Any I idea how to look for processes thrashing my disk? Perversely, the model only ever quits when I'm not watching it, so I don't know what the disk activity is like at the time. The only time I notice lots of disk activity when I'm sitting at my machine is when Time Machine starts up. 
> 
> I'm beginning to wonder if I'm running into some kind of OMP deadlock condition, but I'm not sure how I'd trace that. Going to try recompile with MPI instead and see if the problem persists.
> 
> Cheers,
> Christopher
> 
> -----------------------------------------------------------
> Dr. Christopher L. P. Wolfe
> Research Oceanographer
> Climate, Atmospheric Science, and Physical Oceanography
> Scripps Institution of Oceanography, UCSD
> clwolfe at ucsd.edu                           858-534-4560
> -----------------------------------------------------------
> 
> 
> 
> 
> 
> On Feb 27, 2013, at 1:03 PM, Klymak Jody <jklymak at uvic.ca> wrote:
> 
>> Hi Christopher. 
>> 
>> Try the opposite.  Look for processes thrashing your disk. I had the calendar daemon hogging all my io recently because I had a bunch of dead subscriptions after upgrading to mountain lion. Perhaps you have something similar.  Cheers.  Jody. 
>> 
>> --
>> Jody Klymak
>> http://web.uvic.ca/~jklymak
>> 
>> On 2013-02-27, at 12:59, "Christopher L. P. Wolfe" <clwolfe at ucsd.edu> wrote:
>> 
>>> It's a Mac Pro, so it's a desktop without a battery. I'll definitely try turning off power management from the control panel, but the "caffeinate" utility should have done the same thing. Indeed, my machine was still awake after being left alone overnight, but the model still stalled around 1 am. 
>>> 
>>> Christopher
>>> 
>>> On Feb 27, 2013, at 12:05 PM, Gus Correa <gus at ldeo.columbia.edu> wrote:
>>> 
>>>> How about plugging in the power adapter and on the menus:
>>>> System Preferences -> Energy Saver -> Power Adapter
>>>> change the computer sleep time to "never",
>>>> and perhaps un-check the other power saving options
>>>> (like put the disk to sleep).
>>>> You can revert to the original settings for normal operation.
>>>> Go green!
>>> 
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