Date: Tue, 1 Apr 2003 22:46:43 -0800 (PST) From: Jeff Roberson <jeff@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern sched_ule.c Message-ID: <200304020646.h326khcj032938@repoman.freebsd.org>
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jeff 2003/04/01 22:46:43 PST
FreeBSD src repository
Modified files:
sys/kern sched_ule.c
Log:
- Add in support for KSEs with 0 slice values on the run queue. If we try
to select a KSE with a slice of 0 we will update its slice and insert it
onto the next queue.
- Pass the KSE instead of the ksegrp into sched_slice(). This more
accurately reflects the behavior of the code. Slices are granted to kses.
- Add a function kseq_nice_min() which finds the smallest nice value
assigned to the kseg of any KSE on the queue.
- Rewrite the logic in sched_slice(). Add a large comment describing the
new slice selection scheme. To summarize, slices are assigned based on
the nice value. Priorities are still calculated based on the nice and
interactivity of a process. Slice sizes of 0 may be granted for KSEs
whos nice is 20 or futher away from the lowest nice on the run queue.
Other nice values are scaled across the range [min, min+20]. This fixes
ULEs bad behavior with positively niced processes.
Revision Changes Path
1.17 +91 -35 src/sys/kern/sched_ule.c
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