From 10f57799c66761774c5cd93b7a050dd430ed2fca Mon Sep 17 00:00:00 2001 From: Kevin Quinn Date: Tue, 6 Aug 2024 15:20:33 +0100 Subject: [PATCH] OCPBUGS-35405 Enabling cgroup v2 is not possible if you are using performance profiles. --- modules/nodes-clusters-cgroups-2.adoc | 2 +- .../cnf-tuning-low-latency-nodes-with-perf-profile.adoc | 5 +++++ 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/modules/nodes-clusters-cgroups-2.adoc b/modules/nodes-clusters-cgroups-2.adoc index 7d4968eb53..5ba3b29076 100644 --- a/modules/nodes-clusters-cgroups-2.adoc +++ b/modules/nodes-clusters-cgroups-2.adoc @@ -37,7 +37,7 @@ endif::nodes[] [NOTE] ==== -Currently, disabling CPU load balancing is not supported by cgroup v2. As a result, you might not get the desired behavior from performance profiles if you have cgroup v2 enabled. Enabling cgroup v2 is not recommended if you are using performance profiles. +In Telco, clusters using `PerformanceProfile` for low latency, real-time, and Data Plane Development Kit (DPDK) workloads automatically revert to cgroups v1 due to the lack of cgroups v2 support. Enabling cgroup v2 is not supported if you are using `PerformanceProfile`. ==== .Prerequisites diff --git a/scalability_and_performance/low_latency_tuning/cnf-tuning-low-latency-nodes-with-perf-profile.adoc b/scalability_and_performance/low_latency_tuning/cnf-tuning-low-latency-nodes-with-perf-profile.adoc index 1371c2fcd8..581b7c5b47 100644 --- a/scalability_and_performance/low_latency_tuning/cnf-tuning-low-latency-nodes-with-perf-profile.adoc +++ b/scalability_and_performance/low_latency_tuning/cnf-tuning-low-latency-nodes-with-perf-profile.adoc @@ -19,6 +19,11 @@ You can restrict CPUs for infra and application containers, configure huge pages Learn about the Performance Profile Creator (PPC) and how you can use it to create a performance profile. +[NOTE] +==== +In Telco, clusters using `PerformanceProfile` for low latency, real-time, and Data Plane Development Kit (DPDK) workloads automatically revert to cgroups v1 due to the lack of cgroups v2 support. Enabling cgroup v2 is not supported if you are using `PerformanceProfile`. +==== + include::modules/cnf-about-the-profile-creator-tool.adoc[leveloffset=+2] include::modules/cnf-gathering-data-about-cluster-using-must-gather.adoc[leveloffset=+2]