Introduction I have recently purchased 3 Dell servers, and put myself to task to build out a new lab. My old lab was in desperate need of updating as I had long past the time when 48GB of memory per node was sufficient. The cost of memory, old or new was not even closely in … Continue reading Cockpit for Centos and RHEL 7: Install and Configure
Performance Tuning
How to Install TestPMD on RHEL 7.x
TestPMD is a lightweight application running in user space, utilizing ovs-dpdk, that can be used for testing DPDK in packet forwarding mode. In this example we want to setup TestPMD on a RHEL VM running in our SR-IOV capable Red Hat OpenStack 10 overcloud. Our passthrough adapters are Intel X520s. Our plan here is to … Continue reading How to Install TestPMD on RHEL 7.x
Deploying a Non-NUMA Aligned Instance in RHEL OSP
When you Nova boot an instance in an OSP Overcloud deployed using SR-IOV and CPU Pinning, that instance will be NUMA aligned, meaning that its vCPUs, memory, and SR-IOV VF (Virtual Function) will all be local to the same NUMA node. Nova will not allow you to deploy a non-NUMA aligned instance in such an … Continue reading Deploying a Non-NUMA Aligned Instance in RHEL OSP
Roxio Toast Titanium on Mac OS X opening / running very slow – hello DTrace!
If you find Toast is running very slow on your Mac and you've tried all the other fixes, check to make sure you don't have any mounts defined on your Mac as Toast will continue to try and mount them ad nauseum - thereby causing the slowness. You can check Directory Utility to see if … Continue reading Roxio Toast Titanium on Mac OS X opening / running very slow – hello DTrace!
RedHat Performance Tuning: The Man Pages
This my first post following my week long Redhat Monitoring and Performance Tuning Course (RH442). This course was rather intense and dealt mostly with concepts and theories rather and was not at all a how-to on performance tuning. I am going to do my best to document some of what I learned. Lets start with … Continue reading RedHat Performance Tuning: The Man Pages