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Add initial documentation for core-scheduling. Signed-off-by: Eric Ernst <eric_ernst@apple.com>
13 lines
818 B
Markdown
13 lines
818 B
Markdown
# Core scheduling
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Core scheduling is a Linux kernel feature that allows only trusted tasks to run concurrently on
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CPUs sharing compute resources (for example, hyper-threads on a core).
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Containerd versions >= 1.6.4 leverage this to treat all of the processes associated with a
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given pod or container to be a single group of trusted tasks. To indicate this should be carried
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out, containerd sets the `SCHED_CORE` environment variable for each shim it spawns. When this is
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set, the Kata Containers shim implementation uses the `prctl` syscall to create a new core scheduling
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domain for the shim process itself as well as future VMM processes it will start.
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For more details on the core scheduling feature, see the [Linux documentation](https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/core-scheduling.html).
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