Author: avg
Date: Sun Jan 15 22:47:49 2012
New Revision: 230178
URL: http://svn.freebsd.org/changeset/base/230178
Log:
MFC r228718: ule: ensure that batch timeshare threads are scheduled
fairly
Second take.
Modified:
stable/8/sys/kern/sched_ule.c
Directory Properties:
stable/8/sys/ (props changed)
stable/8/sys/amd64/include/xen/ (props changed)
stable/8/sys/cddl/contrib/opensolaris/ (props changed)
stable/8/sys/contrib/dev/acpica/ (props changed)
stable/8/sys/contrib/pf/ (props changed)
Modified: stable/8/sys/kern/sched_ule.c
==============================================================================
--- stable/8/sys/kern/sched_ule.c Sun Jan 15 22:43:34 2012
(r230177)
+++ stable/8/sys/kern/sched_ule.c Sun Jan 15 22:47:49 2012
(r230178)
@@ -413,7 +413,6 @@ sched_shouldpreempt(int pri, int cpri, i
return (0);
}
-#define TS_RQ_PPQ (((PRI_MAX_BATCH - PRI_MIN_BATCH) + 1) / RQ_NQS)
/*
* Add a thread to the actual run-queue. Keeps transferable counts up to
* date with what is actually on the run-queue. Selects the correct
@@ -446,7 +445,8 @@ tdq_runq_add(struct tdq *tdq, struct thr
* realtime. Use the whole queue to represent these values.
*/
if ((flags & (SRQ_BORROWING|SRQ_PREEMPTED)) == 0) {
- pri = (pri - PRI_MIN_BATCH) / TS_RQ_PPQ;
+ pri = RQ_NQS * (pri - PRI_MIN_BATCH) /
+ (PRI_MAX_BATCH - PRI_MIN_BATCH + 1);
pri = (pri + tdq->tdq_idx) % RQ_NQS;
/*
* This effectively shortens the queue by one so we
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