LAPACK and ScaLAPACK Survey Results - by response

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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:

a. Single precision:
b. Double precision: Very Frequently
c. More than double precision:
d. Complex single precision:
e. Complex double precision: Sometimes
f. Complex, more than double precision:

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?
No

5. Number of processors used for your application:

a. SMP: Less than 10
b. Distributed shared-memory:
c. Distributed memory:

6. Which architectures do you use or intend to use in the next three years?
Symmetric-multi-procs

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

a. User defined matrix types: Somewhat useful
b. Using optional arguments in the language interface: Somewhat useful
c. Automatic memory allocation of the work space: Somewhat useful
d. More complicated matrix data structures: Somewhat useful

9. Do your applications solve linear algebra problems of the type?
Linear positive definite systems, Banded linear systems, General linear systems

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?
Yes

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

11. From which languages do you call LAPACK routines?
Fortran 77, Fortran 90/95, Fortran 2003, Matlab, Octave

14. If you have installed LAPACK yourself, how could the installation process be improved?
it's simple enough

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

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

Targeted Environment Specifics

1. Under which operating system environments do your applications run?
Linux


Additional Information

5.Description of related activities
quadratic and nonlinear programming








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