Performance
How To Monitor Persistent Memory Performance on Linux using PCM, Prometheus, and Grafana
In a previous article, I showed How To Install Prometheus and Grafana on Fedora Server . This article demonstrates how to use the open-source Process Counter Monitor (PCM) utility to collect DRAM and Intel® Optane™ Persistent Memory statistics, and visualize the data in Grafana.
Processor Counter Monitor is an application programming interface (API) and a set of tools based on the API to monitor performance and energy metrics of Intel® Core™, Xeon®, Atom™ and Xeon Phi™ processors. It can also show memory bandwidth for DRAM and Intel Optane Persistent Memory devices. PCM works on Linux, Windows, Mac OS X, FreeBSD and DragonFlyBSD operating systems.
Read MoreUsing ltrace to see what ipmctl and ndctl are doing
Occasionally, it is necessary to debug commands that are slow. Or you may simply be interested in learning how the tools work. While there are many strategies, here are some simple methods that show code flow and timing information.
To show a high-level view of where the time is being spent within libipmctl, use:
# ltrace -c -o ltrace_library_count.out -l '*ipmctl*' ipmctl show -memoryresources
To show a high-level view of where the time is being spent within libndctl, use:
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