CNF-23565: Dedicate CPU resources for DPDK-based vSwitch/vRouter#2001
CNF-23565: Dedicate CPU resources for DPDK-based vSwitch/vRouter#2001Tal-or wants to merge 1 commit into
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@Tal-or: This pull request references CNF-23565 which is a valid jira issue. Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the story to target the "5.0.0" version, but no target version was set. DetailsIn response to this:
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…Router Adds enhancement proposal for dedicating CPUs exclusively for infrastructure networking workloads (OVS-DPDK, OpenPErouter). Introduces two new PerformanceProfile API fields: spec.cpu.dedicated and spec.net.disableOvsDynamicPinning. Tracking: CNF-22582, RFE-8921 AIA Human-AI blend, New content, Human-initiated, Reviewed, Claude Opus 4.6 v1.0 Signed-off-by: Talor Itzhak <titzhak@redhat.com>
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| scheduling (all QoS classes), OS daemons, and kernel housekeeping. | ||
| - Automatically ban dedicated CPUs from irqbalance and configure `isolcpus=domain,managed_irq` | ||
| to prevent hardware interrupts and kernel scheduler interference on dedicated CPUs. | ||
| - Provide the ability to disable OVN-Kubernetes dynamic OVS thread pinning when static CPU |
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I would reword this.
OVS dynamic pinning and OVS-DPDK can coexist, it is just that the user probably does not need two high performance networking stacks. So this option is no related to dedicated cpus per-se.
And disabling dynamic pinning by default would prevent alternative use cases where e.g. industrial controller apps will run on dedicated cpus, but network will still use classic OVS.
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OVS dynamic pinning and OVS-DPDK can coexist, it is just that the user probably does not need two high performance networking stacks. So this option is no related to dedicated cpus per-se.
But having OVS's systemd services affine to the dedicated CPUs, might impact performance if OVS-DPDK is being used (unless the OVS networking stack shut completely)
I agree about the rest
| these, Burstable and BestEffort QoS pods can still be scheduled on dedicated CPUs through | ||
| kernel cpuset inheritance, breaking the isolation guarantee. | ||
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| **Note:** Validation webhook enforcement of this prerequisite is deferred to a future iteration |
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The PerformanceProfile could check the infrastructure mode and report an error when dedicated is used and WP is not present.
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(better than a hook I think)
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hmm, and checking kubelet restrict-reserved option should be possible as well, because we own kubeletconfig.
Are you aware of a case where PP applied but kubeletconfig managed by different component?
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Adds enhancement proposal for dedicating CPUs exclusively for infrastructure networking workloads (OVS-DPDK, OpenPErouter). Introduces two new PerformanceProfile API fields: spec.cpu.dedicated and spec.net.disableOvsDynamicPinning.
Tracking: CNF-22582, RFE-8921
AIA Human-AI blend, New content, Human-initiated, Reviewed, Claude Opus 4.6 v1.0
Signed-off-by: Talor Itzhak titzhak@redhat.com