Open discussion regarding features, bugs, issues, vendors, etc.
For most every scalapack or lapack routines, there are usually one or two work array as input argument. And this is a method to caculate the minimum required space for the work array.
My question is: as for each work array, there is a minimum requirement of space, is it the larger the work array (when larger than the minimum), the better the performance. Or just the minimum is the best choice.
Ming @ Ames
- Posts: 19
- Joined: Mon Jan 24, 2005 11:41 pm
- Location: Ames, IA
For most of the routines, the minimum size will not give you good performance.
You want to use a larger size. The question is how large. To know the optimal size for the work space you have to call the routine first with LWORK=-1 (and with all the other parameters set as you intend to use the routine). The optimal size for the WORK array is calculated and stored in WORK(1).
- Posts: 778
- Joined: Thu Dec 09, 2004 12:32 pm
- Location: Denver, CO, USA
Return to User Discussion
Who is online
Users browsing this forum: Yahoo [Bot] and 2 guests