[petsc-dev] BG hang still broken in petsc-maint!

[Jed Brown]

Barry Smith <bsmith at mcs.anl.gov> writes:
>    I never said “ignore” the files. I said error out if the files
>    exist or somewhat passes a file name down.  

Okay, now they wait in the queue for a week and then the job crashes
first thing.  We should be consistent independent of the number of
processes.  Error consistently if we must.

>    Yes erroring out is a bit annoying but much better than hangs.

Anything is better than hanging.

>     I also question why some system calls are made on all processes but only used on one, for example 
>  if (!flag) {
>     ierr = PetscGetHomeDirectory(pfile,PETSC_MAX_PATH_LEN-16);CHKERRQ(ierr);
>     /* PetscOptionsInsertFile() does a fopen() on rank0 only - so only rank0 HomeDir value is relavent */
> I think a good policy is to minimize system calls to exactly where and when they are needed.

Agreed.
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