Re: [Resend PATCH v8 0/4] sched: Rewrite runnable load and utilization average tracking

[Wanpeng Li]

On 6/18/15 6:46 AM, Yuyang Du wrote:
> On Thu, Jun 18, 2015 at 02:31:00PM +0800, Wanpeng Li wrote:
> > On 6/17/15 11:11 AM, Yuyang Du wrote:
> > > Hi,
> > >
> > > The sched_debug is informative, lets first give it some analysis.
> > >
> > > The workload is 12 CPU hogging tasks (always runnable) and 1 dbench
> > > task doing fs ops (70% runnable) running at the same time.
> > >
> > > Actually, these 13 tasks are in a task group /autogroup-9617, which
> > > has weight 1024.
> > >
> > > So the 13 tasks at most can contribute to an average of 79 (=1024/13)
> > > to the group entity's load_avg:
> > >
> > > cfs_rq[0]:/autogroup-9617
> > > .se->load.weight               : 2
> > > .se->avg.load_avg              : 0
> > >
> > > cfs_rq[1]:/autogroup-9617
> > > .se->load.weight               : 80
> > > .se->avg.load_avg              : 79
> > >
> > > cfs_rq[2]:/autogroup-9617
> > > .se->load.weight               : 79
> > > .se->avg.load_avg              : 78
> > >
> > > cfs_rq[3]:/autogroup-9617
> > > .se->load.weight               : 80
> > > .se->avg.load_avg              : 81
> > >
> > > cfs_rq[4]:/autogroup-9617
> > > .se->load.weight               : 80
> > > .se->avg.load_avg              : 79
> > >
> > > cfs_rq[5]:/autogroup-9617
> > > .se->load.weight               : 79
> > > .se->avg.load_avg              : 77
> > >
> > > cfs_rq[6]:/autogroup-9617
> > > .se->load.weight               : 159
> > > .se->avg.load_avg              : 156
> > >
> > > cfs_rq[7]:/autogroup-9617
> > > .se->load.weight               : 64  (dbench)
> > > .se->avg.load_avg              : 50
> > How you figure out this one is dbench?
> dbench is on CPU7 and running there?

Sorry, do you mean you pin dbench to CPU7?

Regards,
Wanpeng Li

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