Response #1: 2005-08-10

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?
10,000s X 10,000s

4. Does your application come close to, or run out of memory on important problems?
Yes

5. Number of processors used for your application:

6. Which architectures do you use or intend to use in the next three years?
Sequential, Multi-core-thread, Vector-computers, 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?
General linear systems, Symmetric eigenvalue, Non-symmetric eigenvalue, 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?
Vendor

6. Do your applications make direct LAPACK calls?
Yes

7. Do your applications use libraries which depend on LAPACK?
Yes

8. Do your applications use a higher-level interface to LAPACK?
No

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

11. From which languages do you call LAPACK routines?
C, C++, Fortran 77, Fortran 90/95

12. Please describe any tools or helper functions that you frequently implement to assist your applications in using LAPACK?
Compact wrappers

13. How could the LAPACK interface be improved to feel more natural to your application and implementation language?
Simple consistent interface such as outputs first, followed by inputs.

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 )?
Yes

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

6. Do your applications make direct ScaLAPACK calls?
Yes

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

8. Do your applications use a higher-level interface to ScaLAPACK?
No

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

11. From which languages do you call ScaLAPACK routines?
C

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

Targeted Environment Specifics

1. Under which operating system environments do your applications run?
AIX, BSD, Linux, Windows (cygwin), Windows (other)

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

3. If your applications run in a distributed-memory environment, which styles of parallelism do they employ?
Message passing

Additional Information