executor: set CpuWeight in cgroup-v2 #11287
Merged
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Cgroup-v2 uses `cpu.weight` property instead of cpu shares: https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html#cpu-interface-files . And it uses a different range (i.e. `[1, 10000]`) from cpu.shares (i.e. `[2, 262144]`) to make things more interesting. Luckily, the libcontainer provides a helper function to perform the conversion [`ConvertCPUSharesToCgroupV2Value`](https://pkg.go.dev/github.com/opencontainers/runc@v1.0.2/libcontainer/cgroups#ConvertCPUSharesToCgroupV2Value). I have confirmed that docker/libcontainer performs the conversion as well in https://github.com/opencontainers/runc/blob/v1.0.2/libcontainer/specconv/spec_linux.go#L536-L541 , and that CpuShares is ignored by libcontainer in https://github.com/opencontainers/runc/blob/v1.0.2/libcontainer/cgroups/fs2/cpu.go#L24-L29 .
lgfa29
approved these changes
Oct 7, 2021
lgfa29
pushed a commit
that referenced
this pull request
Nov 15, 2021
Cgroup-v2 uses `cpu.weight` property instead of cpu shares: https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html#cpu-interface-files . And it uses a different range (i.e. `[1, 10000]`) from cpu.shares (i.e. `[2, 262144]`) to make things more interesting. Luckily, the libcontainer provides a helper function to perform the conversion [`ConvertCPUSharesToCgroupV2Value`](https://pkg.go.dev/github.com/opencontainers/runc@v1.0.2/libcontainer/cgroups#ConvertCPUSharesToCgroupV2Value). I have confirmed that docker/libcontainer performs the conversion as well in https://github.com/opencontainers/runc/blob/v1.0.2/libcontainer/specconv/spec_linux.go#L536-L541 , and that CpuShares is ignored by libcontainer in https://github.com/opencontainers/runc/blob/v1.0.2/libcontainer/cgroups/fs2/cpu.go#L24-L29 .
lgfa29
pushed a commit
that referenced
this pull request
Nov 15, 2021
Cgroup-v2 uses `cpu.weight` property instead of cpu shares: https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html#cpu-interface-files . And it uses a different range (i.e. `[1, 10000]`) from cpu.shares (i.e. `[2, 262144]`) to make things more interesting. Luckily, the libcontainer provides a helper function to perform the conversion [`ConvertCPUSharesToCgroupV2Value`](https://pkg.go.dev/github.com/opencontainers/runc@v1.0.2/libcontainer/cgroups#ConvertCPUSharesToCgroupV2Value). I have confirmed that docker/libcontainer performs the conversion as well in https://github.com/opencontainers/runc/blob/v1.0.2/libcontainer/specconv/spec_linux.go#L536-L541 , and that CpuShares is ignored by libcontainer in https://github.com/opencontainers/runc/blob/v1.0.2/libcontainer/cgroups/fs2/cpu.go#L24-L29 .
|
I'm going to lock this pull request because it has been closed for 120 days ⏳. This helps our maintainers find and focus on the active contributions. |
Sign up for free
to subscribe to this conversation on GitHub.
Already have an account?
Sign in.
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Cgroup-v2 uses
cpu.weightproperty instead of cpu shares: https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v2.html#cpu-interface-files. And it uses a different range (i.e.[1, 10000]) from cpu.shares (i.e.[2, 262144]) to make things more interesting.Luckily, the libcontainer provides a helper function to perform the conversion
ConvertCPUSharesToCgroupV2Value.I have confirmed that docker/libcontainer performs the conversion as well in https://github.com/opencontainers/runc/blob/v1.0.2/libcontainer/specconv/spec_linux.go#L536-L541, and that CpuShares is ignored by libcontainer in https://github.com/opencontainers/runc/blob/v1.0.2/libcontainer/cgroups/fs2/cpu.go#L24-L29 .
Fixes #11120