Re: [OMPI users] Problems in OpenMPI

2009-07-12 Thread Yin Feng
Can you give me a further explanation about why results are different when it ran it on mutiprocessors against single processor? Thank you! On Fri, Jul 10, 2009 at 4:20 AM, Ashley Pittman wrote: > On Thu, 2009-07-09 at 23:40 -0500, Yin Feng wrote: >> I am a beginner in MPI. >&

Re: [OMPI users] Problems in OpenMPI

2009-07-10 Thread Yin Feng
this situation? On Fri, Jul 10, 2009 at 4:20 AM, Ashley Pittman wrote: > On Thu, 2009-07-09 at 23:40 -0500, Yin Feng wrote: >> I am a beginner in MPI. >> >> I ran an example code using OpenMPI and it seems work. >> And then I tried a parallel example in PETSc tutorials fold

[OMPI users] Problems in OpenMPI

2009-07-10 Thread Yin Feng
I am a beginner in MPI. I ran an example code using OpenMPI and it seems work. And then I tried a parallel example in PETSc tutorials folder (ex5). mpirun -np 4 ex5 It can do but the results are not as accurate as just running ex5. Is that thing normal? After that, send this job to supercomputer