CPU conflicts

What are CPU conflicts?
CPU conflicts are an event in which individual CPU components and machines in a virtualized hardware system wait too long to be processed. In such a system, resources (e.g. CPU, memory, etc.) are distributed across different virtual machines (VMs). Since different processing resources are assigned to different machines, the schedulers in the system arrange input / output and other tasks. Processing of these tasks will be delayed if there are CPU conflicts on their associated machines.

Experts who deal with CPU conflicts warn that these types of internal conflicts can easily happen in a virtualized system. However, there are several ways you can analyze the system to see if CPU contention is a problem. IT pros consider the work of the VM kernel in handling the various processing requirements. A metric named Percent Ready (% Done) shows how long a machine has to wait for processing performance. If this number gets too high, it indicates a CPU conflict.

There are also broader strategies for avoiding CPU contention. For example, experts suggest 'building' rather than clustering virtual CPU allocations in ways that bottlenecks and conflicts can cause problems. In general, administrators want to search for commodity codes and demonstrate that too many CPU components are allocated for scheduling and that individual processes are delayed, which can affect performance.