First Project C CPU Scheduler Linux LTS release

Pls check the discussion, feel free to join the discussion and share your thought about Project C on LTS kernels.

Here is release note and the all-in-one patch is at patch repository.

Enjoy Project C CPU schedulers on LTS kernels, :)

Project C release update message moved

 As you may noticed, I am not updating this blog for Project C kernel release messages.

Because I have used linux-prjc development release page only for two kernel release cycles. If you are looking for latest Project C release update information, pls follow Project C source code repository in gitlab. Usually, the first release -r0 for the latest linux kernel will be released in 0~2 days after the official release of latest kernel.

Enjoy it. ;)

Summer 2021 of Open Source Promotion Plan

 Please check the new session "Summer 2021 of Open Source Promotion Plan" in Project C README.

Your thought about this plan or Project C linux kernel LTS branch support will be welcome.

Discussion thread has been opened.

Project C v5.12-r1 release

 

Project C v5.12-r1 is released.

It was released with previous reported issue fixes. Enjoy it.

Project C v5.12-r0 release

Project C v5.12-r0 is released.

Sync-up release, more issue fixes will be in next release.

Project C v5.11-r2 release

Project C v5.11-r2 is released.

It's a user driven release, thanks who take part into it.

Project C v5.11-r0 release

 

Project C v5.11-r0 is released.

First release for 5.11, a lot of mainline code changes and adaptation, there is still known minor issue, but it should work.

 And, Happy Chinese New Year!

Project C v5.10-r2 release

Project C v5.10-r2 is released.

Fix compilation errors before the new year. :)

Project C v5.10-r1 release

Project C v5.10-r1 is released. 

This is a Xmas release of project c, last two issues raised in previous blog msg is not yet fixed. It is encouraged to create bug report/issue in gitlab, they will be better traced with the code.

2020 is a such different year which impact everyone in the world. Fortunately I can live more closer to normal live but still have face mask on for almost a year now, and I guess it will continue in 2021.

In this year, the development of bmq/pds schedulers still continue, and they make together into project c. To be honest, if I have more WFH time, I could put more time into this project, :) . In short, it is normal year for my scheduler development project. And, hopefully it give you a normal thing feeling in this abnormal year.

Merry Xmas and Happy new year.  Take care yourself and others.

Project C v5.10-r0 release

Project C v5.10-r0 is released.

Project C v5.9-r2 release

 

Project C v5.9-r2 is released at https://gitlab.com/alfredchen/linux-prjc/-/releases/v5.9-prjc-r2

Project C v5.9-r1 release

Project C v5.9-r1 is released at https://gitlab.com/alfredchen/linux-prjc/-/releases/v5.9-prjc-r1

Please be noticed that you need to pick up below fix if your set your NR_CPUS > 64 in your kernel config.

https://gitlab.com/alfredchen/linux-prjc/-/issues/17

Project C v5.9-r0 release

Project C v5.9-r0 is released at https://gitlab.com/alfredchen/linux-prjc/-/releases/v5.9-prjc-r0

Project C v5.8-r3 release

Project C v5.8-r3 is released at https://gitlab.com/alfredchen/linux-prjc/-/releases/v5.8-prjc-r3

And dear users(especial  amd cpu users), please check issue report at https://gitlab.com/alfredchen/linux-prjc/-/issues/8. If you have similar issue, pls let us know and try 00_v5.8_r0_disable_wake_list.patch in the attachments and see if it fix the issue for you.

Project C v5.8-r1release

Project C v5.8-r1 is released with the following changes

1. Fix UP compilation issue.

2. Fix compilation issue when CONFIG_SCHED_THERMAL_PRESSURE enabled.

This is a fix release.

Full kernel tree repository can be found at https://gitlab.com/alfredchen/linux-prjc
And all-in-one patch can be found at gitlab.

Bug report at https://gitlab.com/alfredchen/projectc/issues

Project C v5.8-r0 release

Project C v5.8-r0 is released with the following changes

1. Sync-up 5.8 mainline scheduler code changes.

2. Adjust task boost priority to +/-7, and change SCHED_BITS to 128.

It's one week delay than normal new mainline kernel release. Because there are lots of scheduler related sync-up in 5.8 kernel release. #2 has been asked by users, so here comes the +/- 7 boost priority and 128 bits SCHED_BITS, IMO, this should be well balance setting. But this just provides a more widely overlay in running priorities, it doesn't really change that BMQ is pure priority based scheduler.

PS, PDS porting has been started.

Full kernel tree repository can be found at https://gitlab.com/alfredchen/linux-prjc
And all-in-one patch can be found at gitlab.

Bug report at https://gitlab.com/alfredchen/projectc/issues

Project C v5.7.5-r3 release

Project C v5.7.5-r3 is released with the following changes

1. Include fixes from next release.

2. Introduce rq wake_list.

In 5.8 kernel release, mainline will rework around rq wake_list, so it's better to implement it now and get some test. Its code path just enabled when cpu has multiple last level cache. As I don't have the real HW to test it, so it is tested using qemu only. PS, 5.8 seems to be released in a week or two, but it may be some delay to release the first project c patch on 5.8.

Full kernel tree repository can be found at https://gitlab.com/alfredchen/linux-prjc
And all-in-one patch can be found at gitlab.

Bug report at https://gitlab.com/alfredchen/projectc/issues

Project C repositories

Please be noticed that original BMQ kernel repository and patch repository have been renamed to Project-C ones. Below are the new repositories links

Project C kernel repository https://gitlab.com/alfredchen/linux-prjc
Project C patch repository https://gitlab.com/alfredchen/projectc

If you have cloned the repositories, pls use "git remote set-url xxxxx" to update the links above.