Re: [petsc-users] fortran interface to snes matrix-free jacobian
I apologize; please ignore my answer below. Use MatCreateShell() as indicated by Jed. > On Dec 20, 2023, at 2:14 PM, Barry Smith wrote: > > > >> On Dec 20, 2023, at 11:44 AM, Yi Hu wrote: >> >> Dear Jed, >> >> Thanks for your reply. I have an analytical one to implement. >> >> Best, Yi >> >> -Original Message- >> From: Jed Brown >> Sent: Wednesday, December 20, 2023 5:40 PM >> To: Yi Hu ; petsc-users@mcs.anl.gov >> Subject: Re: [petsc-users] fortran interface to snes matrix-free jacobian >> >> Are you wanting an analytic matrix-free operator or one created for you >> based on finite differencing? If the latter, just use -snes_mf or >> -snes_mf_operator. >> >> https://petsc.org/release/manual/snes/#jacobian-evaluation >> >> Yi Hu writes: >> >>> Dear PETSc team, >>> >>> My solution scheme relies on a matrix-free jacobian in the SNES solver. I >>> saw the useful C interface like MatCreateSNESMF(), >>> DMSNESCreateJacobianMF(). I am wondering if you have the fortran >>> equivalence? > > You can use DMSNESCreateJacobianMF() (MatCreateSNESMF is not appropriate > when you are providing the operation). > > >>> >>> I think for my problem in the main program I need to do >>> DMDASNESsetJacobianLocal(DM, INSERT_VALUES, myJacobian, ctx, err_petsc). >>> Then in myJacobian() subroutine I have to create the operator from >>> DMSNESCreateJacobianMF(), and register my own MATOP_MULT from >>> MatShellSetOperation(). Am I correct? > > Not exactly. Do not use DMDASNESsetJacobianLocal() use > DMSNESCreateJacobianMF() to create a Mat J where you create the SNES and use > SNESSetJacobian() and pass the J matrix in along with myJacobian(). > >>> >>> Are these fortran subroutines available? I saw an example in ts module >>> as ex22f_mf.F90 which behaves similar as what I would like to do. Because I >>> would like to use ngmres, I then need to stay in the SNES. >>> >>> Thanks for your help. >>> >>> Best wishes, >>> Yi >>> >>> - >>> Stay up to date and follow us on LinkedIn, Twitter and YouTube. >>> >>> Max-Planck-Institut für Eisenforschung GmbH Max-Planck-Straße 1 >>> D-40237 Düsseldorf >>> >>> Handelsregister B 2533 >>> Amtsgericht Düsseldorf >>> >>> Geschäftsführung >>> Prof. Dr. Gerhard Dehm >>> Prof. Dr. Jörg Neugebauer >>> Prof. Dr. Dierk Raabe >>> Dr. Kai de Weldige >>> >>> Ust.-Id.-Nr.: DE 11 93 58 514 >>> Steuernummer: 105 5891 1000 >>> >>> >>> Please consider that invitations and e-mails of our institute are only >>> valid if they end with …@mpie.de. >>> If you are not sure of the validity please contact r...@mpie.de >>> >>> Bitte beachten Sie, dass Einladungen zu Veranstaltungen und E-Mails >>> aus unserem Haus nur mit der Endung …@mpie.de gültig sind. >>> In Zweifelsfällen wenden Sie sich bitte an r...@mpie.de >>> - >> >> >> - >> Stay up to date and follow us on LinkedIn, Twitter and YouTube. >> >> Max-Planck-Institut für Eisenforschung GmbH >> Max-Planck-Straße 1 >> D-40237 Düsseldorf >> >> Handelsregister B 2533 >> Amtsgericht Düsseldorf >> >> Geschäftsführung >> Prof. Dr. Gerhard Dehm >> Prof. Dr. Jörg Neugebauer >> Prof. Dr. Dierk Raabe >> Dr. Kai de Weldige >> >> Ust.-Id.-Nr.: DE 11 93 58 514 >> Steuernummer: 105 5891 1000 >> >> >> Please consider that invitations and e-mails of our institute are >> only valid if they end with …@mpie.de. >> If you are not sure of the validity please contact r...@mpie.de >> >> Bitte beachten Sie, dass Einladungen zu Veranstaltungen und E-Mails >> aus unserem Haus nur mit der Endung …@mpie.de gültig sind. >> In Zweifelsfällen wenden Sie sich bitte an r...@mpie.de >> -
Re: [petsc-users] fortran interface to snes matrix-free jacobian
> On Dec 20, 2023, at 11:44 AM, Yi Hu wrote: > > Dear Jed, > > Thanks for your reply. I have an analytical one to implement. > > Best, Yi > > -Original Message- > From: Jed Brown > Sent: Wednesday, December 20, 2023 5:40 PM > To: Yi Hu ; petsc-users@mcs.anl.gov > Subject: Re: [petsc-users] fortran interface to snes matrix-free jacobian > > Are you wanting an analytic matrix-free operator or one created for you based > on finite differencing? If the latter, just use -snes_mf or -snes_mf_operator. > > https://petsc.org/release/manual/snes/#jacobian-evaluation > > Yi Hu writes: > >> Dear PETSc team, >> >> My solution scheme relies on a matrix-free jacobian in the SNES solver. I >> saw the useful C interface like MatCreateSNESMF(), DMSNESCreateJacobianMF(). >> I am wondering if you have the fortran equivalence? You can use DMSNESCreateJacobianMF() (MatCreateSNESMF is not appropriate when you are providing the operation). >> >> I think for my problem in the main program I need to do >> DMDASNESsetJacobianLocal(DM, INSERT_VALUES, myJacobian, ctx, err_petsc). >> Then in myJacobian() subroutine I have to create the operator from >> DMSNESCreateJacobianMF(), and register my own MATOP_MULT from >> MatShellSetOperation(). Am I correct? Not exactly. Do not use DMDASNESsetJacobianLocal() use DMSNESCreateJacobianMF() to create a Mat J where you create the SNES and use SNESSetJacobian() and pass the J matrix in along with myJacobian(). >> >> Are these fortran subroutines available? I saw an example in ts module >> as ex22f_mf.F90 which behaves similar as what I would like to do. Because I >> would like to use ngmres, I then need to stay in the SNES. >> >> Thanks for your help. >> >> Best wishes, >> Yi >> >> - >> Stay up to date and follow us on LinkedIn, Twitter and YouTube. >> >> Max-Planck-Institut für Eisenforschung GmbH Max-Planck-Straße 1 >> D-40237 Düsseldorf >> >> Handelsregister B 2533 >> Amtsgericht Düsseldorf >> >> Geschäftsführung >> Prof. Dr. Gerhard Dehm >> Prof. Dr. Jörg Neugebauer >> Prof. Dr. Dierk Raabe >> Dr. Kai de Weldige >> >> Ust.-Id.-Nr.: DE 11 93 58 514 >> Steuernummer: 105 5891 1000 >> >> >> Please consider that invitations and e-mails of our institute are only >> valid if they end with …@mpie.de. >> If you are not sure of the validity please contact r...@mpie.de >> >> Bitte beachten Sie, dass Einladungen zu Veranstaltungen und E-Mails >> aus unserem Haus nur mit der Endung …@mpie.de gültig sind. >> In Zweifelsfällen wenden Sie sich bitte an r...@mpie.de >> - > > > - > Stay up to date and follow us on LinkedIn, Twitter and YouTube. > > Max-Planck-Institut für Eisenforschung GmbH > Max-Planck-Straße 1 > D-40237 Düsseldorf > > Handelsregister B 2533 > Amtsgericht Düsseldorf > > Geschäftsführung > Prof. Dr. Gerhard Dehm > Prof. Dr. Jörg Neugebauer > Prof. Dr. Dierk Raabe > Dr. Kai de Weldige > > Ust.-Id.-Nr.: DE 11 93 58 514 > Steuernummer: 105 5891 1000 > > > Please consider that invitations and e-mails of our institute are > only valid if they end with …@mpie.de. > If you are not sure of the validity please contact r...@mpie.de > > Bitte beachten Sie, dass Einladungen zu Veranstaltungen und E-Mails > aus unserem Haus nur mit der Endung …@mpie.de gültig sind. > In Zweifelsfällen wenden Sie sich bitte an r...@mpie.de > - >
Re: [petsc-users] fortran interface to snes matrix-free jacobian
Then just use MatShell. I see the docs need some work to clarify this, but MatCreateSNESMF is to specify matrix-free finite differencing from code (perhaps where one wants to customize parameters). Yi Hu writes: > Dear Jed, > > Thanks for your reply. I have an analytical one to implement. > > Best, Yi > > -Original Message- > From: Jed Brown > Sent: Wednesday, December 20, 2023 5:40 PM > To: Yi Hu ; petsc-users@mcs.anl.gov > Subject: Re: [petsc-users] fortran interface to snes matrix-free jacobian > > Are you wanting an analytic matrix-free operator or one created for you based > on finite differencing? If the latter, just use -snes_mf or -snes_mf_operator. > > https://petsc.org/release/manual/snes/#jacobian-evaluation > > Yi Hu writes: > >> Dear PETSc team, >> >> My solution scheme relies on a matrix-free jacobian in the SNES solver. I >> saw the useful C interface like MatCreateSNESMF(), DMSNESCreateJacobianMF(). >> I am wondering if you have the fortran equivalence? >> >> I think for my problem in the main program I need to do >> DMDASNESsetJacobianLocal(DM, INSERT_VALUES, myJacobian, ctx, err_petsc). >> Then in myJacobian() subroutine I have to create the operator from >> DMSNESCreateJacobianMF(), and register my own MATOP_MULT from >> MatShellSetOperation(). Am I correct? >> >> Are these fortran subroutines available? I saw an example in ts module >> as ex22f_mf.F90 which behaves similar as what I would like to do. Because I >> would like to use ngmres, I then need to stay in the SNES. >> >> Thanks for your help. >> >> Best wishes, >> Yi >> >> - >> Stay up to date and follow us on LinkedIn, Twitter and YouTube. >> >> Max-Planck-Institut für Eisenforschung GmbH Max-Planck-Straße 1 >> D-40237 Düsseldorf >> >> Handelsregister B 2533 >> Amtsgericht Düsseldorf >> >> Geschäftsführung >> Prof. Dr. Gerhard Dehm >> Prof. Dr. Jörg Neugebauer >> Prof. Dr. Dierk Raabe >> Dr. Kai de Weldige >> >> Ust.-Id.-Nr.: DE 11 93 58 514 >> Steuernummer: 105 5891 1000 >> >> >> Please consider that invitations and e-mails of our institute are only >> valid if they end with …@mpie.de. >> If you are not sure of the validity please contact r...@mpie.de >> >> Bitte beachten Sie, dass Einladungen zu Veranstaltungen und E-Mails >> aus unserem Haus nur mit der Endung …@mpie.de gültig sind. >> In Zweifelsfällen wenden Sie sich bitte an r...@mpie.de >> - > > > - > Stay up to date and follow us on LinkedIn, Twitter and YouTube. > > Max-Planck-Institut für Eisenforschung GmbH > Max-Planck-Straße 1 > D-40237 Düsseldorf > > Handelsregister B 2533 > Amtsgericht Düsseldorf > > Geschäftsführung > Prof. Dr. Gerhard Dehm > Prof. Dr. Jörg Neugebauer > Prof. Dr. Dierk Raabe > Dr. Kai de Weldige > > Ust.-Id.-Nr.: DE 11 93 58 514 > Steuernummer: 105 5891 1000 > > > Please consider that invitations and e-mails of our institute are > only valid if they end with …@mpie.de. > If you are not sure of the validity please contact r...@mpie.de > > Bitte beachten Sie, dass Einladungen zu Veranstaltungen und E-Mails > aus unserem Haus nur mit der Endung …@mpie.de gültig sind. > In Zweifelsfällen wenden Sie sich bitte an r...@mpie.de > -
Re: [petsc-users] fortran interface to snes matrix-free jacobian
Dear Jed, Thanks for your reply. I have an analytical one to implement. Best, Yi -Original Message- From: Jed Brown Sent: Wednesday, December 20, 2023 5:40 PM To: Yi Hu ; petsc-users@mcs.anl.gov Subject: Re: [petsc-users] fortran interface to snes matrix-free jacobian Are you wanting an analytic matrix-free operator or one created for you based on finite differencing? If the latter, just use -snes_mf or -snes_mf_operator. https://petsc.org/release/manual/snes/#jacobian-evaluation Yi Hu writes: > Dear PETSc team, > > My solution scheme relies on a matrix-free jacobian in the SNES solver. I > saw the useful C interface like MatCreateSNESMF(), DMSNESCreateJacobianMF(). > I am wondering if you have the fortran equivalence? > > I think for my problem in the main program I need to do > DMDASNESsetJacobianLocal(DM, INSERT_VALUES, myJacobian, ctx, err_petsc). Then > in myJacobian() subroutine I have to create the operator from > DMSNESCreateJacobianMF(), and register my own MATOP_MULT from > MatShellSetOperation(). Am I correct? > > Are these fortran subroutines available? I saw an example in ts module > as ex22f_mf.F90 which behaves similar as what I would like to do. Because I > would like to use ngmres, I then need to stay in the SNES. > > Thanks for your help. > > Best wishes, > Yi > > - > Stay up to date and follow us on LinkedIn, Twitter and YouTube. > > Max-Planck-Institut für Eisenforschung GmbH Max-Planck-Straße 1 > D-40237 Düsseldorf > > Handelsregister B 2533 > Amtsgericht Düsseldorf > > Geschäftsführung > Prof. Dr. Gerhard Dehm > Prof. Dr. Jörg Neugebauer > Prof. Dr. Dierk Raabe > Dr. Kai de Weldige > > Ust.-Id.-Nr.: DE 11 93 58 514 > Steuernummer: 105 5891 1000 > > > Please consider that invitations and e-mails of our institute are only > valid if they end with …@mpie.de. > If you are not sure of the validity please contact r...@mpie.de > > Bitte beachten Sie, dass Einladungen zu Veranstaltungen und E-Mails > aus unserem Haus nur mit der Endung …@mpie.de gültig sind. > In Zweifelsfällen wenden Sie sich bitte an r...@mpie.de > - - Stay up to date and follow us on LinkedIn, Twitter and YouTube. Max-Planck-Institut für Eisenforschung GmbH Max-Planck-Straße 1 D-40237 Düsseldorf Handelsregister B 2533 Amtsgericht Düsseldorf Geschäftsführung Prof. Dr. Gerhard Dehm Prof. Dr. Jörg Neugebauer Prof. Dr. Dierk Raabe Dr. Kai de Weldige Ust.-Id.-Nr.: DE 11 93 58 514 Steuernummer: 105 5891 1000 Please consider that invitations and e-mails of our institute are only valid if they end with …@mpie.de. If you are not sure of the validity please contact r...@mpie.de Bitte beachten Sie, dass Einladungen zu Veranstaltungen und E-Mails aus unserem Haus nur mit der Endung …@mpie.de gültig sind. In Zweifelsfällen wenden Sie sich bitte an r...@mpie.de -
Re: [petsc-users] fortran interface to snes matrix-free jacobian
Are you wanting an analytic matrix-free operator or one created for you based on finite differencing? If the latter, just use -snes_mf or -snes_mf_operator. https://petsc.org/release/manual/snes/#jacobian-evaluation Yi Hu writes: > Dear PETSc team, > > My solution scheme relies on a matrix-free jacobian in the SNES solver. I > saw the useful C interface like MatCreateSNESMF(), DMSNESCreateJacobianMF(). > I am wondering if you have the fortran equivalence? > > I think for my problem in the main program I need to do > DMDASNESsetJacobianLocal(DM, INSERT_VALUES, myJacobian, ctx, err_petsc). Then > in myJacobian() subroutine I have to create the operator from > DMSNESCreateJacobianMF(), and register my own MATOP_MULT from > MatShellSetOperation(). Am I correct? > > Are these fortran subroutines available? I saw an example in ts module as > ex22f_mf.F90 which behaves similar as what I would like to do. Because I > would like to use ngmres, I then need to stay in the SNES. > > Thanks for your help. > > Best wishes, > Yi > > - > Stay up to date and follow us on LinkedIn, Twitter and YouTube. > > Max-Planck-Institut für Eisenforschung GmbH > Max-Planck-Straße 1 > D-40237 Düsseldorf > > Handelsregister B 2533 > Amtsgericht Düsseldorf > > Geschäftsführung > Prof. Dr. Gerhard Dehm > Prof. Dr. Jörg Neugebauer > Prof. Dr. Dierk Raabe > Dr. Kai de Weldige > > Ust.-Id.-Nr.: DE 11 93 58 514 > Steuernummer: 105 5891 1000 > > > Please consider that invitations and e-mails of our institute are > only valid if they end with …@mpie.de. > If you are not sure of the validity please contact r...@mpie.de > > Bitte beachten Sie, dass Einladungen zu Veranstaltungen und E-Mails > aus unserem Haus nur mit der Endung …@mpie.de gültig sind. > In Zweifelsfällen wenden Sie sich bitte an r...@mpie.de > -
[petsc-users] fortran interface to snes matrix-free jacobian
Dear PETSc team, My solution scheme relies on a matrix-free jacobian in the SNES solver. I saw the useful C interface like MatCreateSNESMF(), DMSNESCreateJacobianMF(). I am wondering if you have the fortran equivalence? I think for my problem in the main program I need to do DMDASNESsetJacobianLocal(DM, INSERT_VALUES, myJacobian, ctx, err_petsc). Then in myJacobian() subroutine I have to create the operator from DMSNESCreateJacobianMF(), and register my own MATOP_MULT from MatShellSetOperation(). Am I correct? Are these fortran subroutines available? I saw an example in ts module as ex22f_mf.F90 which behaves similar as what I would like to do. Because I would like to use ngmres, I then need to stay in the SNES. Thanks for your help. Best wishes, Yi - Stay up to date and follow us on LinkedIn, Twitter and YouTube. Max-Planck-Institut für Eisenforschung GmbH Max-Planck-Straße 1 D-40237 Düsseldorf Handelsregister B 2533 Amtsgericht Düsseldorf Geschäftsführung Prof. Dr. Gerhard Dehm Prof. Dr. Jörg Neugebauer Prof. Dr. Dierk Raabe Dr. Kai de Weldige Ust.-Id.-Nr.: DE 11 93 58 514 Steuernummer: 105 5891 1000 Please consider that invitations and e-mails of our institute are only valid if they end with …@mpie.de. If you are not sure of the validity please contact r...@mpie.de Bitte beachten Sie, dass Einladungen zu Veranstaltungen und E-Mails aus unserem Haus nur mit der Endung …@mpie.de gültig sind. In Zweifelsfällen wenden Sie sich bitte an r...@mpie.de -
