How can I add parameters to the Linux Kernel scheduler?

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I am learning to work with Linux kernel. Currently I am using 4.15.0-36-generic.



I understood that the schedulers after version 2.6 use a completely fair scheduler. I also came to know that, the implementation uses virtual runtime(v_runtime) for priority updation of a process.



Theoretically, after the the process has a virtual runtime of t, the update is done as



v_runtime += t * (w).



This weight w is said to be a function of the NICE value of the process. It is here, that I want to add one more parameter. I want this w to be a function of NICE value, and another parameter for a given process. The rest of the scheduling algorithm can remain same for the moment.



I cloned the Linux code, and checked out the scheduler code and documentation. I could not locate the point where I could make the change.






linux linux-kernel scheduling







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migrated from unix.stackexchange.com yesterday


This question came from our site for users of Linux, FreeBSD and other Un*x-like operating systems.














  • I have edited to fix grammar and some ambiguity. It I have interpreted the wrong way, then please edit again.
    – ctrl-alt-delor
    yesterday










  • What is the other parameter?
    – ctrl-alt-delor
    yesterday










  • @ctrl-alt-delor It could be a value depending on the type of program
    – Nikhilesh Singh
    yesterday










  • Yes what else could it be?: A parameter has a value, and program ≈ process. More insight may help us to find another solution.
    – ctrl-alt-delor
    18 hours ago














up vote
0
down vote

favorite












I am learning to work with Linux kernel. Currently I am using 4.15.0-36-generic.



I understood that the schedulers after version 2.6 use a completely fair scheduler. I also came to know that, the implementation uses virtual runtime(v_runtime) for priority updation of a process.



Theoretically, after the the process has a virtual runtime of t, the update is done as



v_runtime += t * (w).



This weight w is said to be a function of the NICE value of the process. It is here, that I want to add one more parameter. I want this w to be a function of NICE value, and another parameter for a given process. The rest of the scheduling algorithm can remain same for the moment.



I cloned the Linux code, and checked out the scheduler code and documentation. I could not locate the point where I could make the change.






linux linux-kernel scheduling







share|improve this question















migrated from unix.stackexchange.com yesterday


This question came from our site for users of Linux, FreeBSD and other Un*x-like operating systems.














  • I have edited to fix grammar and some ambiguity. It I have interpreted the wrong way, then please edit again.
    – ctrl-alt-delor
    yesterday










  • What is the other parameter?
    – ctrl-alt-delor
    yesterday










  • @ctrl-alt-delor It could be a value depending on the type of program
    – Nikhilesh Singh
    yesterday










  • Yes what else could it be?: A parameter has a value, and program ≈ process. More insight may help us to find another solution.
    – ctrl-alt-delor
    18 hours ago












up vote
0
down vote

favorite









up vote
0
down vote

favorite











I am learning to work with Linux kernel. Currently I am using 4.15.0-36-generic.



I understood that the schedulers after version 2.6 use a completely fair scheduler. I also came to know that, the implementation uses virtual runtime(v_runtime) for priority updation of a process.



Theoretically, after the the process has a virtual runtime of t, the update is done as



v_runtime += t * (w).



This weight w is said to be a function of the NICE value of the process. It is here, that I want to add one more parameter. I want this w to be a function of NICE value, and another parameter for a given process. The rest of the scheduling algorithm can remain same for the moment.



I cloned the Linux code, and checked out the scheduler code and documentation. I could not locate the point where I could make the change.






linux linux-kernel scheduling







share|improve this question















I am learning to work with Linux kernel. Currently I am using 4.15.0-36-generic.



I understood that the schedulers after version 2.6 use a completely fair scheduler. I also came to know that, the implementation uses virtual runtime(v_runtime) for priority updation of a process.



Theoretically, after the the process has a virtual runtime of t, the update is done as



v_runtime += t * (w).



This weight w is said to be a function of the NICE value of the process. It is here, that I want to add one more parameter. I want this w to be a function of NICE value, and another parameter for a given process. The rest of the scheduling algorithm can remain same for the moment.



I cloned the Linux code, and checked out the scheduler code and documentation. I could not locate the point where I could make the change.






linux linux-kernel scheduling




linux linux-kernel scheduling






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited yesterday









ctrl-alt-delor

4,12032242




4,12032242










asked yesterday









Nikhilesh Singh

114




114




migrated from unix.stackexchange.com yesterday


This question came from our site for users of Linux, FreeBSD and other Un*x-like operating systems.






migrated from unix.stackexchange.com yesterday


This question came from our site for users of Linux, FreeBSD and other Un*x-like operating systems.













  • I have edited to fix grammar and some ambiguity. It I have interpreted the wrong way, then please edit again.
    – ctrl-alt-delor
    yesterday










  • What is the other parameter?
    – ctrl-alt-delor
    yesterday










  • @ctrl-alt-delor It could be a value depending on the type of program
    – Nikhilesh Singh
    yesterday










  • Yes what else could it be?: A parameter has a value, and program ≈ process. More insight may help us to find another solution.
    – ctrl-alt-delor
    18 hours ago
















  • I have edited to fix grammar and some ambiguity. It I have interpreted the wrong way, then please edit again.
    – ctrl-alt-delor
    yesterday










  • What is the other parameter?
    – ctrl-alt-delor
    yesterday










  • @ctrl-alt-delor It could be a value depending on the type of program
    – Nikhilesh Singh
    yesterday










  • Yes what else could it be?: A parameter has a value, and program ≈ process. More insight may help us to find another solution.
    – ctrl-alt-delor
    18 hours ago















I have edited to fix grammar and some ambiguity. It I have interpreted the wrong way, then please edit again.
– ctrl-alt-delor
yesterday




I have edited to fix grammar and some ambiguity. It I have interpreted the wrong way, then please edit again.
– ctrl-alt-delor
yesterday












What is the other parameter?
– ctrl-alt-delor
yesterday




What is the other parameter?
– ctrl-alt-delor
yesterday












@ctrl-alt-delor It could be a value depending on the type of program
– Nikhilesh Singh
yesterday




@ctrl-alt-delor It could be a value depending on the type of program
– Nikhilesh Singh
yesterday












Yes what else could it be?: A parameter has a value, and program ≈ process. More insight may help us to find another solution.
– ctrl-alt-delor
18 hours ago




Yes what else could it be?: A parameter has a value, and program ≈ process. More insight may help us to find another solution.
– ctrl-alt-delor
18 hours ago

















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