Response #1: 2005-08-14

General

1. Is dense linear algebra a performance bottleneck in your applications?
Yes

2. How often do your applications use the arithmetic precisions listed below:

3. What dense matrix sizes are most important or time-consuming for your application?
1,000s X 1,000s

4. Does your application come close to, or run out of memory on important problems?
No

5. Number of processors used for your application:

6. Which architectures do you use or intend to use in the next three years?
Vector-computers, Distributed-shared-memory, Distributed-memory, Hybrid-shared

8. Please rank how the following features would be useful to your current or planned applications?

9. Do your applications solve linear algebra problems of the type?
Linear positive definite systems, Least-square problems, SVDs

LAPACK Usage

1. Do you use LAPACK (or a vendor version of LAPACK )?
Yes

4. If you use LAPACK, do you use a vendors version or one obtained directly from Netlib?
Netlib

6. Do your applications make direct LAPACK calls?
Yes

7. Do your applications use libraries which depend on LAPACK?
No

8. Do your applications use a higher-level interface to LAPACK?
Yes

9. If you answered yes above, which higher-level interfaces do you use?
LAPACK90

10. Is the LAPACK procedure interface a barrier to more extensive use?
No

11. From which languages do you call LAPACK routines?
Fortran 90/95

13. How could the LAPACK interface be improved to feel more natural to your application and implementation language?
Fortran 90/95/2003 interfaces should become standard.

14. If you have installed LAPACK yourself, how could the installation process be improved?
LAPACK always seem to compile fine, but testing routines often fail for non-obvious reasons.

15. How frequently do you refer to the LAPACK Users Guide?
Sometimes

ScaLAPACK Usage

1. Do you use ScaLAPACK (or a vendor version of ScaLAPACK )?
No

2. If you do not use ScaLAPACK, why?
Use another pkg

3. If using another package, which one(s)?
LAPACK -- matrices are local to node

4. If you use ScaLAPACK, do you use a vendors version or one obtained directly from Netlib?
Netlib

6. Do your applications make direct ScaLAPACK calls?
No

11. From which languages do you call ScaLAPACK routines?
Fortran 90/95

15. How frequently do you refer to the ScaLAPACK Users Guide?

Targeted Environment Specifics

1. Under which operating system environments do your applications run?
AIX, IRIX, Linux, Unicos

2. If your applications run in a shared-memory environment, which styles of parallelism do they employ?
Multiple

Additional Information