Answer
cgroups v2 applies weighted fair sharing using quotas and CPU weights.
Quick Answer
Docker uses the cpu.cfs_period_us and cpu.cfs_quota_us cgroup parameters to implement CPU throttling using the Completely Fair Scheduler (CFS). A container with --cpus=0.5 gets 50ms of CPU time per 100ms period. This is deterministic and enforced by the kernel regardless of host CPU load.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ