b8dff0b4f1
Automatic merge from submit-queue (batch tested with PRs 63434, 64172, 63975, 64180, 63755). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. Optimize the lock which in the RunPredicate **What this PR does / why we need it**: Enhance the performance of scheduler - Change the lock in the RunPredicate from lock to rlock **Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*: Could solve part of #63784 **Special notes for your reviewer**: _Run benchmark test by scheduler_perf_: `Before` BenchmarkScheduling/1000Nodes/0Pods-32 1000 11689758 ns/op `After` BenchmarkScheduling/1000Nodes/0Pods-32 1000 5951510 ns/op _Run integration (density) test by scheduler_perf_: Schedule 3000 Pods On 3000 Nodes `Before` rate 19 per second on average `After` rate 58 per second on average _Cpu profile test result_: `Before` [click](https://cdn.rawgit.com/godliness/files/master/63784_before.svg) `After` [click](https://cdn.rawgit.com/godliness/files/master/63784_after.svg) **Release note**: ```release-note `None` ``` /sig scheduling /cc @misterikkit /cc @bsalamat /cc @ravisantoshgudimetla /cc @resouer
Kubernetes
Kubernetes is an open source system for managing containerized applications across multiple hosts; providing basic mechanisms for deployment, maintenance, and scaling of applications.
Kubernetes builds upon a decade and a half of experience at Google running production workloads at scale using a system called Borg, combined with best-of-breed ideas and practices from the community.
Kubernetes is hosted by the Cloud Native Computing Foundation (CNCF). If you are a company that wants to help shape the evolution of technologies that are container-packaged, dynamically-scheduled and microservices-oriented, consider joining the CNCF. For details about who's involved and how Kubernetes plays a role, read the CNCF announcement.
To start using Kubernetes
See our documentation on kubernetes.io.
Try our interactive tutorial.
Take a free course on Scalable Microservices with Kubernetes.
To start developing Kubernetes
The community repository hosts all information about building Kubernetes from source, how to contribute code and documentation, who to contact about what, etc.
If you want to build Kubernetes right away there are two options:
You have a working Go environment.
$ go get -d k8s.io/kubernetes
$ cd $GOPATH/src/k8s.io/kubernetes
$ make
You have a working Docker environment.
$ git clone https://github.com/kubernetes/kubernetes
$ cd kubernetes
$ make quick-release
For the full story, head over to the developer's documentation.
Support
If you need support, start with the troubleshooting guide, and work your way through the process that we've outlined.
That said, if you have questions, reach out to us one way or another.