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Kailun Qin e1584831b6 libct/cg: add CFS bandwidth burst for CPU

Burstable CFS controller is introduced in Linux 5.14. This helps with
parallel workloads that might be bursty. They can get throttled even
when their average utilization is under quota. And they may be latency
sensitive at the same time so that throttling them is undesired.

This feature borrows time now against the future underrun, at the cost
of increased interference against the other system users, by introducing
cfs_burst_us into CFS bandwidth control to enact the cap on unused
bandwidth accumulation, which will then used additionally for burst.

The patch adds the support/control for CFS bandwidth burst.

runtime-spec: https://github.com/opencontainers/runtime-spec/pull/1120

Co-authored-by: Akihiro Suda <suda.kyoto@gmail.com>
Co-authored-by: Nadeshiko Manju <me@manjusaka.me>
Signed-off-by: Kailun Qin <kailun.qin@intel.com>

2023-09-06 23:23:30 +08:00

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Spec conformance

This branch of runc implements the OCI Runtime Spec v1.1.0 for the linux platform.

The following features are not implemented yet:

Spec version	Feature	PR
v1.0.0	`SCMP_ARCH_PARISC`	Unplanned, due to lack of users
v1.0.0	`SCMP_ARCH_PARISC64`	Unplanned, due to lack of users
v1.0.2	`.linux.personality`	#3126
v1.1.0	`SECCOMP_FILTER_FLAG_WAIT_KILLABLE_RECV`	#3862
v1.1.0	time namespaces	#3876
v1.1.0	rsvd hugetlb cgroup	TODO (#3859)
v1.1.0	`.process.scheduler`	TODO (#3895)
v1.1.0	`.process.ioPriority`	#3783

The following features are implemented with some limitations:

Spec version	Feature	Limitation
v1.1.0	`.[]mounts.uidMappings`	Requires using UserNS with identical uidMappings
v1.1.0	`.[]mounts.gidMappings`	Requires using UserNS with identical gidMappings

1.7 KiB Raw Blame History

Spec conformance

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