[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Memory preallocation in python

To: "petsc-users@xxxxxxxxxxx" <petsc-users@xxxxxxxxxxx>
Subject: Memory preallocation in python
From: "Marek Wojciechowski" <mwojc@xxxxxxxxx>
Date: Mon, 21 Aug 2006 11:11:21 -0000
Organization: Politechnika Łódzka
Reply-to: petsc-users@xxxxxxxxxxx
Sender: owner-petsc-users@xxxxxxxxxxx
User-agent: Opera Mail/9.00 (Linux)

Hi,

i have a small problem in python. In case of matrix assembling -info says me something like:

[0] MatSetUpPreallocationWarning not preallocating matrix storage [0] MatAssemblyEnd_SeqAIJMatrix size: 6006 X 6006; storage space: 12084 unneeded,108036 used [0] MatAssemblyEnd_SeqAIJNumber of mallocs during MatSetValues() is 6006 [0] MatAssemblyEnd_SeqAIJMaximum nonzeros in any row is 18 [0] Mat_CheckInodeFound 2002 nodes of 6006. Limit used: 5. Using Inode routines

This obviously means poor behavior because of dynamical memory allocation. Unfortunately, I have no idea how to preallocate memory for Mat objects in python. Any suggestions?

Greetings
--
Marek Wojciechowski

Follow-Ups:
- Re: Memory preallocation in python
  - From: Matthew Knepley

Prev by Date: Re: function for eigendecomposition
Next by Date: Re: Memory preallocation in python
Previous by thread: 回复： Re: function for eigendecomposition
Next by thread: Re: Memory preallocation in python
Index(es):
- Date
- Thread