Opened 16 years ago
Closed 16 years ago
#47 closed Enhancement (fixed)
solpcg MPI optimization
| Reported by: | rblod | Owned by: | rblod |
|---|---|---|---|
| Priority: | low | Milestone: | |
| Component: | OCE | Version: | v2 |
| Severity: | Keywords: | ||
| Cc: |
Description
Improvement of the Conjugate Gradient solver in MPI case.
Method : gather the 2 scalary products in one to decrease latency
This changes computation results when using PCG, but does not change the number of iterations.
For algorithm description, see :
D’Azevedo, E. F., Eijkhout, V. L., and Romine, C. H. 1993.
Conjugate gradient algorithms with reduced synchronization overhead on distributed memory multiprocessors.
Computer Science Technical Report CS-93-185, University of Tennessee, Knoxville.
And for additional information :
Dongarra, J. and Eijkhout, V. 2003.
Finite-choice algorithm optimization in conjugate gradients. Computer Science
Technical Report UT-CS-03-502, University of Tennessee, Knoxville.
Commit History (1)
| Changeset | Author | Time | ChangeLog |
|---|---|---|---|
| 787 | rblod | 2008-01-11T14:33:42+01:00 | Improve PCG algortithm in MPI case, see ticket #47 |
Change History (1)
comment:1 Changed 16 years ago by rblod
- Resolution set to fixed
- Status changed from new to closed
