linux-kernel - Re: Performance regression of specjbb2005/aim7 with 2.6.29-rc1

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Message-Id: <1232032258.8870.71.camel@laptop>
Date:	Thu, 15 Jan 2009 16:10:58 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Lin Ming <ming.m.lin@...el.com>
Cc:	Mike Galbraith <efault@....de>,
	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>, dev@...sonking.com,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Performance regression of specjbb2005/aim7 with 2.6.29-rc1

On Thu, 2009-01-15 at 10:30 +0800, Lin Ming wrote:

> diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
> index 8e1352c..617e54c 100644
> --- a/kernel/sched_fair.c
> +++ b/kernel/sched_fair.c
> @@ -429,10 +429,10 @@ static u64 sched_slice(struct cfs_rq *cfs_rq, struct sched_entity *se)
>  	u64 slice = __sched_period(cfs_rq->nr_running + !se->on_rq);
>  
>  	for_each_sched_entity(se) {
> -		struct load_weight *load = &cfs_rq->load;
> +		struct load_weight *load = &cfs_rq_of(se)->load;
>  
>  		if (unlikely(!se->on_rq)) {
> -			struct load_weight lw = cfs_rq->load;
> +			struct load_weight lw = cfs_rq_of(se)->load;
>  
>  			update_load_add(&lw, se->load.weight);
>  			load = &lw;
> 

I was wrong, this does look good.

Thanks

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