thread and ksegrp priorities
ravi.murty at intel.com
Mon Apr 21 16:24:46 UTC 2008
I am working on the 6.2 FreeBSD code base and has a couple of simple
questions. The thread structure defines two priority fields
"td_base_pri" and "td_priority" while a ksegrp defines "kg_user_pri" and
1. Since a ksegrp can have multiple "process scope" threads, how is
kg_user_pri used and how is it related to td_base_pri and td_priority?
2. What is the difference between td_base_pri and td_priority?
3. If kg_user_pri changes, does it mean that the priority of all
threads that are part of the ksegrp change?
It appears that these things change when a thread returns to user mode
(returns to normal user priority), when returning from a sleep (priority
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