Kubernetes CPU multithreading

Question

I have a 4 cores CPU, I create a Kubernetes Pod with CPU resource limit 100m, which mean it will occupy 1/10 of a core power.

I wondering in this case, 100m is not e

Answer 1

Take a look to this documentation related to resources in Kubernetes:

You can use resources as described in the article:

To specify a CPU request for a Container, include the resources:requests field in the Container resource manifest. To specify a CPU limit, include resources:limits.

In this exercise, you create a Pod that has one Container. The Container has a request of 0.5 CPU and a limit of 1 CPU. Here is the configuration file for the Pod:

apiVersion: v1
kind: Pod
metadata:
  name: cpu-demo
  namespace: cpu-example
spec:
  containers:
  - name: cpu-demo-ctr
    image: vish/stress
    resources:
      limits:
        cpu: "1"
      requests:
        cpu: "0.5"
    args:
    - -cpus
    - "2"

Additional to your question: Yes it is not gonna run in parallels (multi core threads). But you can show few core for your application in pod and then use multi threads to execute it.

The args section of the configuration file provides arguments for the Container when it starts. The -cpus "2" argument tells the Container to attempt to use 2 CPUs.