From: Zhang, Hong
Date: Monday, March 4, 2024 at 6:34 PM
To: Zou, Ling
Cc: Jed Brown , Barry Smith ,
petsc-users@mcs.anl.gov
Subject: Re: [petsc-users] 'Preconditioning' with lower-order method
Ling,
Are you using PETSc TS? If so, it may worth trying Crank-Nicolson first to see
Jed Brown mailto:j...@jedbrown.org>>
Date: Sunday, March 3, 2024 at 11:35 PM
To: Zou, Ling mailto:l...@anl.gov>>, Barry Smith
mailto:bsm...@petsc.dev>>
Cc: petsc-users@mcs.anl.gov<mailto:petsc-users@mcs.anl.gov>
mailto:petsc-users@mcs.anl.gov>>
Subject: Re: [petsc-
From: Jed Brown
Date: Sunday, March 3, 2024 at 11:35 PM
To: Zou, Ling , Barry Smith
Cc: petsc-users@mcs.anl.gov
Subject: Re: [petsc-users] 'Preconditioning' with lower-order method
If you're having PETSc use coloring and have confirmed that the stencil is
sufficient, then it would
>
>
> On Mar 3, 2024, at 11:42 AM, Zou, Ling via petsc-users wrote:
>
> Original email may have been sent to the incorrect place.
> See below.
>
> -Ling
>
> From: Zou, Ling >
> Date: Sunday, March 3, 2024 at 10:34 AM
> To: petsc-users >
> Subject: 'Pre
not in
the 1st order.
For the same problem, the wall time is 10 sec vs 6 sec. I would be happy if I
can reduce 2 sec for the 2nd order method.
-Ling
From: Barry Smith
Date: Sunday, March 3, 2024 at 12:06 PM
To: Zou, Ling
Cc: petsc-users@mcs.anl.gov
Subject: Re: [petsc-users] 'Preconditioning
Are you forming the Jacobian for the first and second order cases inside of
Newton?
You can run both with -log_view to see how much time is spent in the various
events (compute function, compute Jacobian, linear solve, ...) for the two
cases and compare them.
> On Mar 3, 2024, at
