LAPACK and ScaLAPACK Survey Results - by response

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Response #1: 2005-08-15


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

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

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

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

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

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?
Multi-core-thread, Distributed-memory

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

a. User defined matrix types: Not 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?
Banded linear systems, General linear systems, Generalized eigenvalue, Symmetric eigenvalue, Non-symmetric eigenvalue, SVDs


6. Do your applications make direct LAPACK calls?

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

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

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

10. Is the LAPACK procedure interface a barrier to more extensive use?

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

14. If you have installed LAPACK yourself, how could the installation process be improved?
Many recent compilers seem too clever for automatic detection of parameters like machine epsilon to work. It would be useful to have a replacement that uses Fortran 90 intrinsics instead.

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


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

2. If you do not use ScaLAPACK, why?
Cost of learning

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

Targeted Environment Specifics

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

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

Additional Information

Wed Feb 22 12:22:02 2017
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