El 14/01/2010, a las 01:04, Takuya Sekikawa escribi?:
Dear SLEPc/PETSc team,
On Wed, 13 Jan 2010 09:50:57 +0100
Jose E. Roman jroman at dsic.upv.es wrote:
[Q2]
Generally, Is MPI only useful in very large matrix?
Now I have to solve eigenvalue problem of 1M x 1M matrix,
Should I use
Dear SLEPc/PETSc team,
I tried to run SLEPc's samples program ex1 in MPI-based multi-PC
environment. (1-PC vs 2-PCs)
(ex)
[running ex1 in only 1 PC]
--
$ time -p mpiexec -n 1 ./ex1 -n 4000 -eps_max_it 1
...
real 76.2
Hi Jose,
Thank you for very quick reply.
On Wed, 13 Jan 2010 09:50:57 +0100
Jose E. Roman jroman at dsic.upv.es wrote:
On 13/01/2010, Takuya Sekikawa wrote:
Dear SLEPc/PETSc team,
I tried to run SLEPc's samples program ex1 in MPI-based multi-PC
environment. (1-PC vs 2-PCs)
(ex)
I have a few more questions.
Just in case I want to ask.
[Q1]
In general, like ex1, Don't we need any change to source code to
run program with MPI-based system?
in other words, to run SLEPc-based program in MPI-based system,
all I need to do is changing ./configure option (--with-mpi=1, etc)
On 13/01/2010, Takuya Sekikawa wrote:
I have a few more questions.
Just in case I want to ask.
[Q1]
In general, like ex1, Don't we need any change to source code to
run program with MPI-based system?
in other words, to run SLEPc-based program in MPI-based system,
all I need to do is
On Wed, 13 Jan 2010 09:50:57 +0100, Jose E. Roman jroman at dsic.upv.es
wrote:
On the other hand, a better way to measure the parallel execution time
is to edit the source file and put PetscGetTime around the Solve call.
Or use -log_summary
Jed
On Wed, 13 Jan 2010, Jose E. Roman wrote:
On 13/01/2010, Takuya Sekikawa wrote:
I have a few more questions.
Just in case I want to ask.
[Q1]
In general, like ex1, Don't we need any change to source code to
run program with MPI-based system?
in other words, to run
