From: Balbir Singh <balbir@linux.vnet.ibm.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: pjt@google.com, linux-kernel@vger.kernel.org,
Ingo Molnar <mingo@elte.hu>,
Srivatsa Vaddagiri <vatsa@in.ibm.com>,
Chris Friesen <cfriesen@nortel.com>,
Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>,
Pierre Bourdon <pbourdon@excellency.fr>,
Bharata B Rao <bharata@linux.vnet.ibm.com>
Subject: Re: [RFC tg_shares_up improvements - v1 00/12] [RFC tg_shares_up - v1 00/12] Reducing cost of tg->shares distribution
Date: Sun, 17 Oct 2010 17:39:33 +0530 [thread overview]
Message-ID: <20101017120933.GM13048@balbir.in.ibm.com> (raw)
In-Reply-To: <1287308331.1998.135.camel@laptop>
* Peter Zijlstra <peterz@infradead.org> [2010-10-17 11:38:51]:
> On Sun, 2010-10-17 at 10:54 +0530, Balbir Singh wrote:
> >
> > The results do sound interesting, could I recommend that you try to
> > get 1000 cgroups or so, with half of them as active and half inactive.
> > I'd also suggest tracking system and user time at the cgroup level.
>
> Sure, but do keep in mind that 500 active cgroups will always utterly
> suck no matter what you do, it means we do indeed need to iterate 500
> cgroups for a lot of scheduler operations.
>
I agree in general, but in my case I've seen nasty things even when
the groups were empty.
--
Three Cheers,
Balbir
next prev parent reply other threads:[~2010-10-17 12:17 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-16 4:43 pjt
2010-10-16 4:43 ` [RFC tg_shares_up improvements - v1 01/12] sched: rewrite tg_shares_up pjt
2010-10-21 6:04 ` Bharata B Rao
2010-10-21 6:28 ` Paul Turner
2010-10-21 8:08 ` Bharata B Rao
2010-10-21 8:38 ` Paul Turner
2010-10-21 9:08 ` Peter Zijlstra
[not found] ` <AANLkTi=zYAfb_izD15ROxH=C6+zPzX+XEGw7r5UUoAar@mail.gmail.com>
2010-11-04 21:00 ` Paul Turner
2010-10-16 4:43 ` [RFC tg_shares_up improvements - v1 02/12] sched: on-demand (active) cfs_rq list pjt
2010-10-16 4:43 ` [RFC tg_shares_up improvements - v1 03/12] sched: make tg_shares_up() walk on-demand pjt
2010-10-16 4:43 ` [RFC tg_shares_up improvements - v1 04/12] sched: fix load corruption from update_cfs_shares pjt
2010-10-16 4:43 ` [RFC tg_shares_up improvements - v1 05/12] sched: fix update_cfs_load synchronization pjt
2010-10-21 9:52 ` Bharata B Rao
2010-10-21 18:25 ` Paul Turner
2010-10-16 4:43 ` [RFC tg_shares_up improvements - v1 06/12] sched: hierarchal order on shares update list pjt
2010-10-16 4:43 ` [RFC tg_shares_up improvements - v1 07/12] sched: add sysctl_sched_shares_window pjt
2010-10-16 4:43 ` [RFC tg_shares_up improvements - v1 08/12] sched: update shares on idle_balance pjt
2010-10-16 4:43 ` [RFC tg_shares_up improvements - v1 09/12] sched: demand based update_cfs_load() pjt
2010-10-16 4:43 ` [RFC tg_shares_up improvements - v1 10/12] sched: allow update_cfs_load to update global load pjt
2010-10-16 4:44 ` [RFC tg_shares_up improvements - v1 11/12] sched: update tg->shares after cpu.shares write pjt
2010-10-16 4:44 ` [RFC tg_shares_up improvements - v1 12/12] debug: export effective shares for analysis versus specified pjt
2010-10-16 19:46 ` [RFC tg_shares_up improvements - v1 00/12] [RFC tg_shares_up - v1 00/12] Reducing cost of tg->shares distribution Peter Zijlstra
2010-10-21 6:36 ` Paul Turner
2010-10-22 0:14 ` Paul Turner
2010-10-17 5:24 ` Balbir Singh
2010-10-17 9:38 ` Peter Zijlstra
2010-10-17 12:09 ` Balbir Singh [this message]
2010-11-03 18:27 ` Karl Rister
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