[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH] xen: recalculate per-cpupool credits when updating timeslice
When modifying the timeslice of the credit scheduler in a cpupool the cpupool global credit value (n_cpus * credits_per_tslice) isn't recalculated. This will lead to wrong scheduling decisions later. Do the recalculation when updating the timeslice. Signed-off-by: Juergen Gross <jgross@xxxxxxxx> --- xen/common/sched_credit.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/xen/common/sched_credit.c b/xen/common/sched_credit.c index 03fb2c2..912511e 100644 --- a/xen/common/sched_credit.c +++ b/xen/common/sched_credit.c @@ -1086,12 +1086,19 @@ csched_dom_cntl( static inline void __csched_set_tslice(struct csched_private *prv, unsigned timeslice) { + unsigned long flags; + + spin_lock_irqsave(&prv->lock, flags); + prv->tslice_ms = timeslice; prv->ticks_per_tslice = CSCHED_TICKS_PER_TSLICE; if ( prv->tslice_ms < prv->ticks_per_tslice ) prv->ticks_per_tslice = 1; prv->tick_period_us = prv->tslice_ms * 1000 / prv->ticks_per_tslice; prv->credits_per_tslice = CSCHED_CREDITS_PER_MSEC * prv->tslice_ms; + prv->credit = prv->credits_per_tslice * prv->ncpus; + + spin_unlock_irqrestore(&prv->lock, flags); } static int -- 2.6.2 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |