14%
26.01.2012
processes (such as an HPC application). One way to use this tool is to run it on all of the compute nodes that are running a particular application, perhaps as part of a job script. When the MPI job runs, you
14%
03.07.2013
to understand the MPI portion, and so on. At this point, Amdahl’s Law says that to get better performance, you need to focus on the serial portion of your application.
Whence Does Serial Come?
The parts
14%
15.01.2014
(MPI), provisioning, and monitoring can also limit the data received and frequency at which it is gathered. As previously mentioned, oversubscribed networks are another source of bottlenecks, so you need
14%
21.04.2016
for certain usage modules or system architectures, especially with parallel MPI job execution.
Singularity for the Win!
Kurtzer, who works at Lawrence Berkeley National Laboratory (LBNL), is a long-time open
14%
20.03.2023
is important because it includes where things like MPI libraries or profilers are located, as well as where compilers and their associated tools are located. I discuss these concerns as the article progresses
14%
12.09.2022
themselves (e.g., Message Passing Interface (MPI)).
Performing I/O in a logical and coherent manner from disparate processes is not easy. It’s even more difficult to perform I/O in parallel. I’ll begin
14%
19.05.2014
with my /home/layton
directory on my local system (host = desktop
). I also access an HPC system that has its own /home/jlayton
directory (the login node is login1
). On the HPC system I only keep some
14%
26.01.2012
Number of Lseeks
/dev/shm/Intel_MPI_zomd8c
386
/dev/shm/Intel_MPI_zomd8c
386
/etc/ld.so.cache
386
/usr/lib64/libdat.so
386
/usr/lib64
14%
15.02.2012
Number of Lseeks
/dev/shm/Intel_MPI_zomd8c
386
/dev/shm/Intel_MPI_zomd8c
386
/etc/ld.so.cache
386
/usr/lib64/libdat.so
386
/usr/lib64
14%
24.09.2015
is not easy to accomplish; consequently, a solution has been sought that allows each TP to read/write data from anywhere in the file, hopefully without stepping on each others’ toes.
MPI-I/O
Over time, MPI
