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docs: cpu: resources: fix vcpu calculation formula

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The formula is not updated according on
how is done in kata-runtime.

Fixes: #489

Signed-off-by: Jose Carlos Venegas Munoz <jose.carlos.venegas.munoz@intel.com>
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Jose Carlos Venegas Munoz 2019-06-11 13:12:23 -05:00
parent 16efde2004
commit 3fe8660a9a
1 changed files with 1 additions and 1 deletions
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design/cpu-constraints.md
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@ -130,7 +130,7 @@ more vCPUs, you can add more using [docker update][4].
## Container with CPU constraint
The runtime calculates the number of vCPUs required by a container with CPU
constraints using the following formula: `(quota + (period -1)) / period`, where
constraints using the following formula: `vCPUs = ceiling( quota / period )`, where
`quota` specifies the number of microseconds per CPU Period that the container is
guaranteed CPU access and `period` specifies the CPU CFS scheduler period of time
in microseconds. The result determines the number of vCPU to hot plug into the