Author: avg
Date: Sun Jan 15 22:10:35 2012
New Revision: 230173
URL: http://svn.freebsd.org/changeset/base/230173
Log:
MFC r228718: ule: ensure that batch timeshare threads are scheduled
fairly
Modified:
stable/9/sys/kern/sched_ule.c
Directory Properties:
stable/9/sys/ (props changed)
stable/9/sys/amd64/include/xen/ (props changed)
stable/9/sys/boot/ (props changed)
stable/9/sys/boot/i386/efi/ (props changed)
stable/9/sys/boot/ia64/efi/ (props changed)
stable/9/sys/boot/ia64/ski/ (props changed)
stable/9/sys/boot/powerpc/boot1.chrp/ (props changed)
stable/9/sys/boot/powerpc/ofw/ (props changed)
stable/9/sys/cddl/contrib/opensolaris/ (props changed)
stable/9/sys/conf/ (props changed)
stable/9/sys/contrib/dev/acpica/ (props changed)
stable/9/sys/contrib/octeon-sdk/ (props changed)
stable/9/sys/contrib/pf/ (props changed)
stable/9/sys/contrib/x86emu/ (props changed)
Modified: stable/9/sys/kern/sched_ule.c
==============================================================================
--- stable/9/sys/kern/sched_ule.c Sun Jan 15 22:08:44 2012
(r230172)
+++ stable/9/sys/kern/sched_ule.c Sun Jan 15 22:10:35 2012
(r230173)
@@ -125,6 +125,7 @@ static struct td_sched td_sched0;
*/
#define PRI_TIMESHARE_RANGE (PRI_MAX_TIMESHARE - PRI_MIN_TIMESHARE
+ 1)
#define PRI_INTERACT_RANGE ((PRI_TIMESHARE_RANGE -
SCHED_PRI_NRESV) / 2)
+#define PRI_BATCH_RANGE (PRI_TIMESHARE_RANGE -
PRI_INTERACT_RANGE)
#define PRI_MIN_INTERACT PRI_MIN_TIMESHARE
#define PRI_MAX_INTERACT (PRI_MIN_TIMESHARE + PRI_INTERACT_RANGE
- 1)
@@ -416,7 +417,6 @@ 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
@@ -449,7 +449,7 @@ 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_BATCH_RANGE;
pri = (pri + tdq->tdq_idx) % RQ_NQS;
/*
* This effectively shortens the queue by one so we
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