[mpich-discuss] Possible bug: --enable-g=all configure option does not include all other --enable-g options

[Dave Goodell]

I don't like the gcc model that much.

The key is just to change the current assumption that "yes"=="all".  I'll code up a patch to add a "most" and make "yes" (i.e., the default when you just pass "--enable-g") equivalent to that.  Then I'll change "all" to really mean everything.

-Dave

On Mar 12, 2013, at 10:36 AM CDT, Jim Dinan <dinan at mcs.anl.gov> wrote:

> How about, following the gcc model:
> 
> --enable-g=all enable most debugging features
> --enable-g=extra enable most + additional debugging features
> 
> ~Jim.
> 
> On 3/12/13 8:59 AM, William Gropp wrote:
>> While I agree that "all" should mean "all", this unfortunate use is
>> consistent with gcc, which uses -Wall to mean "most of the warning
>> options, but not the ones that who ever is in charge of this release did
>> not like or forgot about."
>> 
>> A better name might be --enable-g=most - and for gcc, -Wmost .  Anything
>> else is either too long or misleading.
>> 
>> Bill
>> 
>> William Gropp
>> Director, Parallel Computing Institute
>> Deputy Director for Research
>> Institute for Advanced Computing Applications and Technologies
>> Thomas M. Siebel Chair in Computer Science
>> University of Illinois Urbana-Champaign
>> 
>> 
>> 
>> 
>> On Mar 11, 2013, at 8:14 PM, Jeff Hammond wrote:
>> 
>>> --enable-g=all should enable all debugging options to satisfy the
>>> principle of least surprise as well as simple English language meaning
>>> of the word "all".
>>> 
>>> perhaps there should be an option
>>> --enable-g=important/most/devel/useful/sane that enables all of the
>>> debug options that are reasonable for the "average hardcore user" /
>>> developer.
>>> 
>>> jeff
>>> 
>>> On Mon, Mar 11, 2013 at 4:33 PM, Jeremiah Willcock
>>> <jewillco at osl.iu.edu <mailto:jewillco at osl.iu.edu>> wrote:
>>>> On Mon, 11 Mar 2013, Dave Goodell wrote:
>>>> 
>>>>> On Mar 11, 2013, at 3:36 PM CDT, Jeremiah Willcock
>>>>> <jewillco at osl.iu.edu <mailto:jewillco at osl.iu.edu>>
>>>>> wrote:
>>>>> 
>>>>>> In MPICH 3.0.2, the help message for the --enable-g=all configure
>>>>>> option
>>>>>> states that it enables "All of the above choices", but in fact
>>>>>> (according to
>>>>>> configure.ac) it does not enable the "handle" or "memarena"
>>>>>> debugging flags.
>>>>>> Is that the intended behavior?  Thank you for your help.
>>>>> 
>>>>> 
>>>>> The situation is unclear.  I just did a little bit of git
>>>>> archaeology and
>>>>> it looks like these flags were added prior to MPICH2-1.0.6, which is
>>>>> as far
>>>>> back as I can look without having to sift through ancient CVS
>>>>> history.  The
>>>>> pickaxe doesn't show any place where variables corresponding to
>>>>> those flags
>>>>> might have been removed from the "all|yes)" case.  It looks like just a
>>>>> mistake or sloppiness on someone's part in the distant past.
>>>>> 
>>>>> I'm not sure what the right "fix" is.  The "memarena" option actually
>>>>> introduces quite a bit of overhead that we may not want enabled
>>>>> casually.
>>>>> The "handles" option is pretty lightweight, at least in stock MPICH.  I
>>>>> suppose we could add both to the "all" option and then change the "yes"
>>>>> option to be a set of reasonable defaults instead.
>>>>> 
>>>>> Do you have a preference?  Or are you just observing a discrepancy?
>>>> 
>>>> 
>>>> I was both observing a discrepancy and trying to debug something and was
>>>> surprised that "all" didn't include "handles".
>>>> 
>>>> -- Jeremiah Willcock
>>>> 
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>>> 
>>> 
>>> --
>>> Jeff Hammond
>>> Argonne Leadership Computing Facility
>>> University of Chicago Computation Institute
>>> jhammond at alcf.anl.gov <mailto:jhammond at alcf.anl.gov> / (630) 252-5381
>>> http://www.linkedin.com/in/jeffhammond
>>> https://wiki.alcf.anl.gov/parts/index.php/User:Jhammond
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>> 
>> 
>> 
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