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----
-lastproofread: '2026-02-23'
----
-
-(vpp-config-dataplane-cpu)=
-
-```{include} /_include/need_improvement.txt
-```
-
-
-# VPP Dataplane CPU Configuration
-
-VPP can utilize multiple CPU cores for better packet processing
-performance. Proper CPU configuration is essential for optimal
-throughput and low latency.
-
-VPP CPU assignment is handled automatically. You specify how many CPU
-cores VPP may use, and the system distributes them between the main
-thread and worker threads.
-
-:::{important}
-Review the system configuration settings page before changing CPU
-settings: {doc}`system`.
-:::
-
-If you don't configure CPU settings, VPP uses a single core for the
-main thread and doesn't create worker threads.
-
-## CPU Configuration Parameters
-
-### `cpu-cores`
-
-This parameter defines the total number of CPU cores allocated to VPP.
-
-```{cfgcmd} set vpp settings resource-allocation cpu-cores \<core-number\>
-```
-
-The system automatically assigns cores using the following rules:
-
-> - The first two CPU cores are always reserved for the operating system and
-> other services.
-> - The main VPP thread is assigned to the first available core after the
-> reserved ones.
-> - The remaining allocated cores are used for worker threads.
-
-For example:
-
-> - If cpu-cores is set to 1, VPP runs only a main thread.
->
-> - If cpu-cores is set to 4, VPP uses:
->
-> > - 1 core for the main thread
-> > - 3 cores for worker threads
-
-Choose a value based on available hardware resources and expected
-traffic load. Too few cores may limit performance, while too many can
-negatively impact other system services.
-
-## Potential Issues and Troubleshooting
-
-Improper CPU configuration can lead to issues such as:
-
-- VPP underperformance when not enough cores are assigned, or kernel
- underperformance when too many cores are assigned to VPP.
-- Resource conflicts with other processes and services.
-
-Indicators of such issues are:
-
-- VPP or kernel forwarding performance is lower than expected
-- Degraded performance of system components or services, such as DNS,
- DHCP, and dynamic routing