Messages in this thread | | | Date | Tue, 04 Nov 2014 11:21:19 +0800 | From | Wanpeng Li <> | Subject | Re: [PATCH v8 08/10] sched: add SD_PREFER_SIBLING for SMT level |
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Hi Vincent, On 14/10/31 下午4:47, Vincent Guittot wrote: > Add the SD_PREFER_SIBLING flag for SMT level in order to ensure that > the scheduler will put at least 1 task per core.
What's the behavior before this patch?
Regards, Wanpeng Li
> > Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org> > Reviewed-by: Preeti U. Murthy <preeti@linux.vnet.ibm.com> > --- > kernel/sched/core.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/kernel/sched/core.c b/kernel/sched/core.c > index 37fb92c..731f2ad 100644 > --- a/kernel/sched/core.c > +++ b/kernel/sched/core.c > @@ -6165,6 +6165,7 @@ sd_init(struct sched_domain_topology_level *tl, int cpu) > */ > > if (sd->flags & SD_SHARE_CPUCAPACITY) { > + sd->flags |= SD_PREFER_SIBLING; > sd->imbalance_pct = 110; > sd->smt_gain = 1178; /* ~15% */ >
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