Thanks a lot, I'm using petsc since 2004
On 7/11/2024 5:09 PM, Barry Smith wrote:
The default behavior previously was the flip of the current
behavior. By the way, we also now have much better performance if you
do not preallocate (not as good as with perfect preallocation, but
much bette
The default behavior previously was the flip of the current behavior. By the
way, we also now have much better performance if you do not preallocate (not as
good as with perfect preallocation, but much better than in ancient history;
you simply do not preallocate to get this behavior).
Ba
Thanks a lot.
Is this a new feature? It seems to me that 10 years ago the default
behavior was different.
Michael.
On 7/11/2024 4:04 PM, Barry Smith wrote:
By default, if you preallocate but not enough, it will automatically
error unless you call
MatSetOption(mat,MAT_NEW_NONZERO_ALLOCATI
By default, if you preallocate but not enough, it will automatically error
unless you call MatSetOption(mat,MAT_NEW_NONZERO_ALLOCATION_ERR,PETSC_FALSE);
> On Jul 11, 2024, at 4:02 PM, Michael Povolotskyi wrote:
>
> Thank you,
>
> let me clarify my question.
>
> Imagine that I have a sparse
Thank you,
let me clarify my question.
Imagine that I have a sparse matrix, and the number of non zero entries
that I specified is too small.
I know that I can insert values in it but it will be slow.
I remember there was a way to make PETSC to throw an error if a number
of non zero element
MatGetInfo() is the programmatic interface used to get this information. You
can also run a proggram with -info and grep for malloc.
Barry
> On Jul 11, 2024, at 1:55 PM, Michael Povolotskyi wrote:
>
> This Message Is From an External Sender
> This message came from outside your organiza
Hello, is there an option in PETSC that allows to check at run time if a sparse matrix has been preallocated correctly? I remember there was something like that is the older versions, but cannot find it now. The goal is to get rid of any possible
ZjQcmQRYFpfptBannerStart
