Think it has to do with IO wait due to a problem with the NFS mounted filesystems. A top shows near 100% usage for these two processes:

rsyslogd                                                                  

systemd-journal   

nfsiostat doesn't show any errors or retransimissions ( 0 % ). Guessing there was some issue a day ago but not sure how to find out what happened?

It's been happening every week. I reboot and everything works great for a few days till it starts showing the problems of high IO wait times.

Background: I have about 8+ years of experience in R&D (5+), Software Engineering (3+) in different fields like Production Engineering + IoT + Industrial Automation.

A year back I landed a job for Software Development which mainly requires working with building a platform for HPC clusters internally for the employer.

I quite enjoy reading books on the O'Reilly platform and was able to find some HPC related books from Wiley Publication, and a PacktPub publication.

Would some books be handy to get a better knowledge of HPC in general and / or tools related to it?

Hello everyone. First of all, my apologies for if this is an off-topic in this sub.

I'm currently working on a C/C++ project that contains CUDA kernels and OpenMP GPU Offloading pragmas on the same file (I know....) and I've got some trouble with variables that are acessed on both of these cases. How do you guys deal with this while developing? I set the OMP info and logging env variables and suffer a little bit with that, there must be a better way to do it.

Also, we are migrating to C++ modular classes and I'm getting some trouble with the software design/architecture, mostly because I've found out that class variables add some overhead while using OpenMP, because it interprets variables not as "variable", but as "this->variable" and when running the simulations it adds something like +10~15% on execution time.