[petsc-users] compare: performance of petsc_3.3p2 and petsc_dev-r24197

[Feng Li]

Thank you for your help!
The problem is resolved smoothly according to your method.


2012/8/22 Jed Brown <jedbrown at mcs.anl.gov>

> Also,
>
> *      ##########################################################*
> *      #                                                        #*
> *      #                          WARNING!!!                    #*
> *      #                                                        #*
> *      #   This code was compiled with a debugging option,      #*
> *      #   To get timing results run ./configure                #*
> *      #   using --with-debugging=no, the performance will      #*
> *      #   be generally two or three times faster.              #*
> *      #                                                        #*
> *      ##########################################################*
>
>
> On Wed, Aug 22, 2012 at 6:07 AM, Matthew Knepley <knepley at gmail.com>wrote:
>
>> On Wed, Aug 22, 2012 at 5:52 AM, Feng Li <fengshen186 at gmail.com> wrote:
>>
>>> Thank you for your help!
>>> The log_summary result is in the attachment.
>>> Please kindly check the attachment!
>>>
>>
>> This is not a PETSc change, its a PFLOTRAN change. You have changed the
>> way
>> the Jacobian is evaluated. Look at the 3.3 log
>>
>> SNESSolve             18 1.0 1.2947e+01 1.0 1.22e+09 1.0 0.0e+00 0.0e+00
>> 0.0e+00 44 83  0  0  0  93100  0  0  0    94
>> SNESFunctionEval      39 1.0 3.3130e+00 1.0 0.00e+00 0.0 0.0e+00 0.0e+00
>> 0.0e+00 11  0  0  0  0  24  0  0  0  0     0
>> SNESJacobianEval      21 1.0 4.2020e+00 1.0 0.00e+00 0.0 0.0e+00 0.0e+00
>> 0.0e+00 14  0  0  0  0  30  0  0  0  0     0
>> SNESLineSearch        21 1.0 1.8140e+00 1.0 4.82e+06 1.0 0.0e+00 0.0e+00
>> 0.0e+00  6  0  0  0  0  13  0  0  0  0     3
>> KSPGMRESOrthog       470 1.0 8.2534e-01 1.0 7.25e+08 1.0 0.0e+00 0.0e+00
>> 0.0e+00  3 50  0  0  0   6 59  0  0  0   879
>>
>> against the dev log
>>
>> SNESSolve             18 1.0 4.3973e+01 1.0 1.22e+09 1.0 0.0e+00 0.0e+00
>> 0.0e+00 40 83  0  0  0  98100  0  0  0    28
>> SNESFunctionEval      39 1.0 3.2787e+00 1.0 0.00e+00 0.0 0.0e+00 0.0e+00
>> 0.0e+00  3  0  0  0  0   7  0  0  0  0     0
>> SNESJacobianEval      21 1.0 3.5318e+01 1.0 0.00e+00 0.0 0.0e+00 0.0e+00
>> 0.0e+00 32  0  0  0  0  79  0  0  0  0     0
>> SNESLineSearch        21 1.0 1.8007e+00 1.0 4.82e+06 1.0 0.0e+00 0.0e+00
>> 0.0e+00  2  0  0  0  0   4  0  0  0  0     3
>> KSPGMRESOrthog       470 1.0 8.0665e-01 1.0 7.25e+08 1.0 0.0e+00 0.0e+00
>> 0.0e+00  1 50  0  0  0   2 59  0  0  0   899
>>
>> The huge difference here comes from the Jacobian evaluation, which we do
>> not control.
>>
>>     Matt
>>
>>
>>> 2012/8/22 Aron Ahmadia <aron.ahmadia at kaust.edu.sa>
>>>
>>>> Can you re-run both codes with: -log_summary please?
>>>>
>>>> A
>>>>
>>>> On Wed, Aug 22, 2012 at 10:43 AM, Feng Li <fengshen186 at gmail.com>
>>>> wrote:
>>>> > The performance of petsc_3.3p2 is five times faster than
>>>> petsc_dev-r24197.
>>>> > Why?
>>>> >
>>>> > It is tested with pflotran example problem 100x100x100.
>>>> > config parameter：--with-mpi=0 --CC=gcc --FC=gfortran --CCFLAGS="-g
>>>> -O2"
>>>> > --FCFLAGS="-g -O2" --blas-lapack-dir=$MKLROOT
>>>> >
>>>> > detail time:
>>>> >                       petsc_3.3p2          petsc_dev24197
>>>> > walltime(sec)        28.116                 110.25
>>>> >
>>>> > Thank you!
>>>>
>>>> --
>>>>
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>>>
>>>
>>
>>
>> --
>> What most experimenters take for granted before they begin their
>> experiments is infinitely more interesting than any results to which their
>> experiments lead.
>> -- Norbert Wiener
>>
>
>


-- 
Thank you！
Best regards!
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