Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

v1.7 tree (unreleased): CPU usage regression #11155

Closed
joestringer opened this issue Apr 25, 2020 · 2 comments
Closed

v1.7 tree (unreleased): CPU usage regression #11155

joestringer opened this issue Apr 25, 2020 · 2 comments
Assignees
@joestringer
Labels
kind/bug This is a bug in the Cilium logic. sig/datapath Impacts bpf/ or low-level forwarding details, including map management and monitor messages.

Comments

@joestringer
Copy link
Member

We have had community reports of higher CPU usage on v1.7 branch compared to v1.7.2 or earlier, likely caused by backport #10949.

Investigate and either revert the backport or address the issue.
@joestringer joestringer added kind/bug This is a bug in the Cilium logic. priority/release-blocker sig/datapath Impacts bpf/ or low-level forwarding details, including map management and monitor messages. labels Apr 25, 2020
@joestringer joestringer self-assigned this Apr 28, 2020
@joestringer
Copy link
Member Author

I plan to look into this tomorrow unless I'm preempted by other tasks. If you have any information or are interested to investigate, please feel free to do so and report here.

@joestringer
Copy link
Member Author

Upon deeper investigation, the "regression" was in fact confirmation that the fix in #10949 is effective. On kernel 4.15 users will see brief spikes in CPU usage every five minutes due to ipcache garbage collection period. We may revisit whether 5 minutes is appropriate and how to customize this, but there does not appear to be any effective regression in v1.7 branch that would provide reason to hold up the release.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Assignees

@joestringer joestringer

Labels
kind/bug This is a bug in the Cilium logic. sig/datapath Impacts bpf/ or low-level forwarding details, including map management and monitor messages.
Projects
None yet
Milestone
No milestone
Development

No branches or pull requests
1 participant
@joestringer