djs55/hyperkit-high-cpu

---

djs55/hyperkit-high-cpu.json

{
  "createdAt": "2020-11-30T19:46:40Z",
  "defaultBranch": "main",
  "description": "An example of an idle VM inducing high CPU in hyperkit",
  "fullName": "djs55/hyperkit-high-cpu",
  "homepage": null,
  "language": "Go",
  "name": "hyperkit-high-cpu",
  "pushedAt": "2020-11-30T19:51:29Z",
  "stargazersCount": 2,
  "topics": [],
  "updatedAt": "2020-11-30T20:33:16Z",
  "url": "https://github.com/djs55/hyperkit-high-cpu"
}

hyperkit-high-cpu

An example of an idle VM inducing high CPU in hyperkit

To build:

linuxkit build bad.yml
linuxkit build good.yml

To see a VM with low CPU:

linuxkit run good

To see a VM with high CPU:

linuxkit run bad

Note the only difference is the good VM uses Linux 4.19 while the bad VM uses Linux 5.4. To try to make the bad VM better, all the bug mitigations have been disabled but this doesn’t seem to help.

The helper script go run measure.go will monitor the %cpu of the hyperkit process for 60 seconds and produce an average.