From 836dc18a378464e3e89a6b6e01c4a24a21f0316b Mon Sep 17 00:00:00 2001 From: Juergen Gross <jgross@suse.com> Date: Wed, 17 Feb 2016 16:48:37 +0100 Subject: [PATCH 39/43] credit: 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@suse.com> Tested-by: Alan.Robinson <alan.robinson@ts.fujitsu.com> Reviewed-by: Dario Faggioli <dario.faggioli@citrix.com> master commit: ffc342fbb060cd753fc3a5f6fb6f550dd29a2637 master date: 2016-02-02 14:03:40 +0100 --- xen/common/sched_credit.c | 1 + 1 file changed, 1 insertion(+) diff --git a/xen/common/sched_credit.c b/xen/common/sched_credit.c index 0e61a0e..54fd830 100644 --- a/xen/common/sched_credit.c +++ b/xen/common/sched_credit.c @@ -1071,6 +1071,7 @@ __csched_set_tslice(struct csched_private *prv, unsigned timeslice) 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; } static int -- 2.7.2