[petsc-users] Memory per core - parallel eigenvalue problem

[Jose E. Roman]

Once again, you need a parallel linear solver.
Read FAQ #6 and the corresponding section on the users manual.
http://slepc.upv.es/documentation/faq.htm
Jose


El 25/05/2015, a las 15:18, venkatesh g escribió:

> Hi, 
> 
> I am solving the generalized eigen problem Ax=lambda Bx given in EX7 in Slepc manual.
> 
> Now I have restructured my matrix and I get reasonable answers.
> 
> However, when I submit the problem in multiple cores, it is accessing a large amount of memory than a serial job. 
> 
> 1 Serial job  - Amount of memory used = 18 GB
> 
> Parallel job in 240 cores - Amount of memory used = 456 GB
> 
> I have attached the performance log for the run. 
> 
> I think it is loading the full matrix in each core for a parallel job, but I am not sure how to resolve or whether I am correct.. 
> 
> Kindly help.
> 
> cheers,
> Venkatesh
> 
> <performance_log.txt>