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Copy file name to clipboardExpand all lines: modules/telco-core-cpu-partitioning-performance-tune.adoc
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= CPU partitioning and performance tuning
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New in this release::
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* No reference design updates in this release
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* In this release, {product-title} deployments use Control Groups version 2 (cgroup v2) by default. As a consequence, performance profiles in a cluster use cgroups v2 for the underlying resource management layer.
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Description::
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CPU partitioning allows for the separation of sensitive workloads from generic purposes, auxiliary processes, interrupts, and driver work queues to achieve improved performance and latency. The CPUs allocated to those auxiliary processes are referred to as `reserved` in the following sections. In hyperthreaded systems, a CPU is one hyperthread.
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* Hardware without Interrupt Request (IRQ) affinity support will impact isolated CPUs. To ensure that pods with guaranteed CPU QoS have full use of allocated CPU, all hardware in the server must support IRQ affinity.
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* OVS dynamically manages its `cpuset` configuration to adapt to network traffic needs.
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You do not need to reserve additional CPUs for handling high network throughput on the primary CNI.
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* If workloads running on the cluster require cgroups v1, you can configure nodes to use cgroups v1. You can make this configuration as part of initial cluster deployment. For more information, see _Enabling Linux cgroup v1 during installation_ in the _Additional resources_ section.
Multus - Tap CNI for rootless DPDK pod,xref:../../telco_ref_design_specs/core/telco-core-ref-crs.adoc#telco-core-mc_rootless_pods_selinux-yaml[mc_rootless_pods_selinux.yaml],No,No
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