From: Nick Piggin <nickpiggin@yahoo.com.au>
To: vatsa@in.ibm.com
Cc: george@mvista.com, mingo@elte.hu,
high-res-timers-discourse@lists.sourceforge.net,
linux-kernel@vger.kernel.org
Subject: Re: VST and Sched Load Balance
Date: Fri, 08 Apr 2005 00:06:54 +1000 [thread overview]
Message-ID: <42553E7E.8000102@yahoo.com.au> (raw)
In-Reply-To: <20050407140040.GD17268@in.ibm.com>
Srivatsa Vaddagiri wrote:
>
> Hmm ..I guess we could restrict the max time a idle CPU will sleep taking
> into account its balance interval. But whatever heuristics we follow to
> maximize balance_interval of about-to-sleep idle CPU, don't we still run the
> risk of idle cpu being woken up and going immediately back to sleep (because
> there was no imbalance)?
>
Yep.
> Moreover we may be greatly reducing the amount of time a CPU is allowed to
> sleep this way ...
>
Yes. I was assuming you get some kind of fairly rapidly diminishing
efficiency return curve based on your maximum sleep time. If that is
not so, then I agree this wouldn't be the best method.
--
SUSE Labs, Novell Inc.
next prev parent reply other threads:[~2005-04-07 14:07 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-07 12:46 VST and Sched Load Balance Srivatsa Vaddagiri
2005-04-07 13:07 ` Nick Piggin
2005-04-07 14:00 ` Srivatsa Vaddagiri
2005-04-07 14:06 ` Nick Piggin [this message]
2005-05-05 14:39 ` Srivatsa Vaddagiri
2005-05-05 14:52 ` Nick Piggin
2005-05-05 16:15 ` Srivatsa Vaddagiri
2005-04-07 15:10 ` Ingo Molnar
2005-04-08 5:34 ` Srivatsa Vaddagiri
2005-04-08 6:33 ` Nick Piggin
2005-04-19 16:07 ` Nish Aravamudan
2005-04-20 9:11 ` Srivatsa Vaddagiri
-- strict thread matches above, loose matches on Subject: below --
2005-04-07 16:25 Srivatsa Vaddagiri
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