Determine online CPUs from a standard source.

[kishen-v]

Determine CPUs that are online from /sys/devices/system/cpu/online compared to the path generated from the parameters, which may not exist.

I'm really looking forward to any suggestions or insights from the community.

Addresses: #3317

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[k8s-ci-robot]

Hi @kishen-v. Thanks for your PR.

I'm waiting for a google member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[kishen-v]

/cc @mkumatag

[iwankgb]

/ok-to-test

[mkumatag]

I see failures with following reason:

I0608 01:18:34.352] I0608 01:17:51.377898    1741 framework.go:334] About to run - [sudo docker run -d --name test-basic-docker-container-1741 kubernetes/pause]
I0608 01:18:34.352]     framework.go:337: Failed to run "sudo" [docker run -d --name test-basic-docker-container-1741 kubernetes/pause] in "localhost" with error: "exit status 125". Stdout: "", Stderr: Unable to find image 'kubernetes/pause:latest' locally
I0608 01:18:34.352]         docker: Error response from daemon: manifest for kubernetes/pause:latest not found: manifest unknown: manifest unknown.
I0608 01:18:34.352]         See 'docker run --help'.

kubernetes/pause doesn't have any tags anymore

It will be better to adopt the newer image registry.k8s.io/pause

[iwankgb]

Fix is awaiting approval in #3304.