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?
No

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

a. Single precision: Very Frequently
b. Double precision: Frequently
c. More than double precision: Rarely
d. Complex single precision: Rarely
e. Complex double precision: Rarely
f. Complex, more than double precision: Never

3. What dense matrix sizes are most important or time-consuming for your application?
1,000s X 100s

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

6. Which architectures do you use or intend to use in the next three years?
Sequential

7. Do you use any other sequential or parallel dense linear algebra packages other than LAPACK or ScaLAPACK?
Compact Numerical Methods / Pascal

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:
d. More complicated matrix data structures: Somewhat useful

9. Do your applications solve linear algebra problems of the type?
Linear positive definite systems, Symmetric eigenvalue, 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?
Vendor

6. Do your applications make direct LAPACK calls?
No

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?
R

11. From which languages do you call LAPACK routines?
R

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

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, Windows (other)

2a. Please specify any particular libraries of frameworks used?
R and R contributed


Additional Information

5.Description of related activities
statistical computations








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