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| /freebsd-10.0-release/sys/kern/ | ||
| H A D | sched_ule.c | diff 121868 Sun Nov 02 01:36:33 MST 2003 jeff - Change sched_interact_update() to only accept slp+runtime values between 0 and SCHED_SLP_RUN_MAX * 2. This allows us to simplify the algorithm quite a bit. Before, it dealt with arbitrary values which required us to do nasty integer division tricks that didn't quite work out correctly. - Chnage sched_wakeup() to detect conditions where the slp+runtime could exceed SCHED_SLP_RUN_MAX * 2. This can happen if we go to sleep for longer than 6 seconds. In this case, we'll just clear the runtime and set the sleep time to the max. - Define a new function, sched_interact_fork() which updates the slp+runtime of a newly forked thread. We want to limit the amount of history retained from the parent so that we learn the child's behavior quickly. We don't, however want to decay it to nothing. Previously, we would simply divide each parameter by 100 whenever we forked. After a few forks the values would reach 0 and tasks would not be considered interactive. - Add another KTR entry, cleanup some existing entries. - Remove a useless sched_interact_update() from sched_priority(). This is already done by the callers that require it. |
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