[petsc-dev] [petsc-users] PETSc release soon, request for input on needed fixes or enhancements

[Barry Smith]

> On Feb 29, 2016, at 10:39 AM, Griffith, Boyce Eugene <boyceg at email.unc.edu> wrote:
> 
>> 
>> On Feb 29, 2016, at 12:15 AM, Barry Smith <bsmith at mcs.anl.gov> wrote:
>> 
>> 
>>> On Feb 27, 2016, at 8:22 PM, Boyce Griffith <griffith at cims.nyu.edu> wrote:
>>> 
>>> Barry —
>>> 
>>> I haven’t been following master, and so maybe these have already been addressed, but is there a chance that fixes for the performance issues Amneet found (options in setting up lots of KSPs in small-block ASM,
>> 
>>  Thanks for the reminder. I have added a new ./configure option--with-debugging=0 which will remove all of that overhead and likely perform better than the "hack" I suggested to apply earlier. This is in the branch barry/fixes-for-release-1 and will be in master if it passes all the test.
>> 
>>  I'll also remind you of the option --with-errorchecking=0 which turns off additional overhead that in theory is not needed in production runs and could help a bit more when using many small solvers.
> 
> Thanks Barry! Is --with-errorchecking=0 implied by --with-debugging=0 (or vice versa), or are these somewhat independent? We were running the timing tests with --with-debugging=0 but not with --with-errorchecking=0.

   The three options are all independent. Turn them all on for faster time --with-debugging=0  --with-viewfromoptions=0 --with-errorchecking=0

> 
> Amneet, can you please verify that the performance issues you uncovered are fixed with a clean checkout of the PETSc branch Barry mentions above along with the foregoing PETSc configure options?

   You could send me a trace file (like you did before) and I'll see if there is anything else that might be improved.

   Barry

> 
> Thanks,
> 
> -- Boyce
> 
>> 
>> Please let us know if there are any difficulties.
>> 
>> Barry
>> 
>> 
>>> and logging of IS objects) will make it into 3.7?
>>> 
>>> Thanks,
>>> 
>>> — Boyce
>>> 
>>>> On Feb 27, 2016, at 3:36 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:
>>>> 
>>>> 
>>>> PETSc Users,
>>>> 
>>>> We are planning the PETSc release 3.7 shortly. If you know of any bugs that need to be fixed or enhancements added before the release please let us know.
>>>> 
>>>> You can think of the master branch of the PETSc repository obtainable with 
>>>> 
>>>> git clone https://bitbucket.org/petsc/petsc petsc
>>>> 
>>>> as a release candidate for 3.7. Changes for the release are listed at http://www.mcs.anl.gov/petsc/documentation/changes/dev.html
>>>> 
>>>> Thanks
>>>> 
>>>> Barry