13%
23.04.2013
on a separate computer. The results can be combined when the job is finished because the map step has no dependencies. The popular mpiBLAST tool takes the same approach by breaking the human genome file
12%
05.04.2013
is counterproductive. You are paying more and getting less. However, new workloads are being added to HPC all of the time that might be very different from the classic MPI applications in HPC and have different
12%
12.02.2013
of Open MPI installed and a user wanted to try the PetSc libraries with a new version, you could easily install and build everything in /opt
and have the user running new code without rebooting nodes
20%
30.01.2013
-5.0 Written by Jeff Layton
##
proc ModulesHelp { } {
global version modroot
puts stderr ""
puts stderr "The mpi/opempi/1.6-open64-5.0 module enables the Open MPI"
puts stderr "library and tools
13%
16.01.2013
method to calculate the value of pi:
$ grep -v local /etc/hosts | cut -d" " -f2 > ~/hostfile
$ nano pi.py
$ mpirun -np 2 -hostfile hostfile python pi.py
3.14192133333
Listing 8: pi.py
01 from mpi4py
12%
03.01.2013
-ons, such as MPI, and rewriting the code. This approach allows you to start multiple instances of the tool on different nodes and have them communicate over a network so that code can be executed in parallel.
I won
13%
19.12.2012
’t cover it here.
MPI Profiling and Tracing
For HPC, it’s appropriate to discuss how to profile and trace MPI (Message-Passing Interface) applications. A number of MPI profiling tools are available
28%
04.12.2012
was particularly effective in HPC because clusters were composed of singe- or dual-processor (one- or two-core) nodes and a high-speed interconnect. The Message-Passing Interface (MPI) mapped efficiently onto ... HPC, parallel processing, GPU, multicore, OpenMP, MPI, many core, OpenACC, CUDA, MICs, GP-GPU
12%
21.11.2012
, and subtract the first reading from the second.
034 !
035 ! This function is meant to suggest the similar routines:
036 !
037 ! "omp_get_wtime ( )" in OpenMP,
038 ! "MPI_Wtime ( )" in MPI,
039
15%
06.11.2012
options, and you notice that some simple options are a choice of MPI and BLAS libraries. Of course, you also need to choose a compiler. The task seems simple enough until you lay out the possible choices