How to linux scheduling process with weight value
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I am reading "Linux Kernel Development" and i have some point i have not understand about weight value of process. In linux kernel, each process has a nice value, and than mapping nice value to weight.
- first: i think weight is "the proportion of processor time". it mean process'runtime allocated is: its weight/(total weight of all process)* (processor time). if result of above formula is 10%, but actual the runtime of process lower than 10%, it is priority. Right?
- second (if fisrt is true): i confused about how cfs check it. is cfs check periodly (example 1 milisecond) and cfs update runtime of process, compare proportion actual runtime/process'runtime allocated than choose min and run it ? by the way, can you enum some function used. Thank you
linux linux-kernel
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I am reading "Linux Kernel Development" and i have some point i have not understand about weight value of process. In linux kernel, each process has a nice value, and than mapping nice value to weight.
- first: i think weight is "the proportion of processor time". it mean process'runtime allocated is: its weight/(total weight of all process)* (processor time). if result of above formula is 10%, but actual the runtime of process lower than 10%, it is priority. Right?
- second (if fisrt is true): i confused about how cfs check it. is cfs check periodly (example 1 milisecond) and cfs update runtime of process, compare proportion actual runtime/process'runtime allocated than choose min and run it ? by the way, can you enum some function used. Thank you
linux linux-kernel
asked 2 mins ago
NAMNAM
1
New contributor
NAM is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
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I am reading "Linux Kernel Development" and i have some point i have not understand about weight value of process. In linux kernel, each process has a nice value, and than mapping nice value to weight.
- first: i think weight is "the proportion of processor time". it mean process'runtime allocated is: its weight/(total weight of all process)* (processor time). if result of above formula is 10%, but actual the runtime of process lower than 10%, it is priority. Right?
- second (if fisrt is true): i confused about how cfs check it. is cfs check periodly (example 1 milisecond) and cfs update runtime of process, compare proportion actual runtime/process'runtime allocated than choose min and run it ? by the way, can you enum some function used. Thank you
linux linux-kernel
asked 2 mins ago
NAMNAM
1
New contributor
NAM is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I am reading "Linux Kernel Development" and i have some point i have not understand about weight value of process. In linux kernel, each process has a nice value, and than mapping nice value to weight.
- first: i think weight is "the proportion of processor time". it mean process'runtime allocated is: its weight/(total weight of all process)* (processor time). if result of above formula is 10%, but actual the runtime of process lower than 10%, it is priority. Right?
- second (if fisrt is true): i confused about how cfs check it. is cfs check periodly (example 1 milisecond) and cfs update runtime of process, compare proportion actual runtime/process'runtime allocated than choose min and run it ? by the way, can you enum some function used. Thank you
linux linux-kernel
linux linux-kernel
asked 2 mins ago
NAMNAM
1
New contributor
NAM is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 mins ago
NAMNAM
1
New contributor
NAM is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 mins ago
NAMNAM
1
New contributor
NAM is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 mins ago
NAMNAM
1
asked 2 mins ago
NAMNAM
1
1
New contributor
NAM is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
NAM is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
NAM is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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