From: Valdis.Kletnieks@vt.edu
To: Robert Kubrick <robertkubrick@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>, linux-kernel@vger.kernel.org
Subject: Re: 2.6.32 / RH 6.1 scheduler bloated
Date: Sun, 09 Oct 2011 13:38:34 -0400 [thread overview]
Message-ID: <109116.1318181914@turing-police.cc.vt.edu> (raw)
In-Reply-To: Your message of "Sun, 09 Oct 2011 10:26:22 EDT." <8AF29618-6746-484D-B773-AED31FBA714D@gmail.com>
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On Sun, 09 Oct 2011 10:26:22 EDT, Robert Kubrick said:
> Will try this, but I have older kernel version running on the same
> hardware, with the same boot parameters, and showing a more
> reasonable 2us wakeup latency. Still high, but coming out of idle can
> be slow as you say.
> But 10us??
My first guess is that earlier kernels were dropping into a lower sleep state
that only took 2us to wake up, but newer kernels go into a deeper sleep state
that takes longer to wake up from...
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prev parent reply other threads:[~2011-10-09 17:38 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-09 0:26 Robert Kubrick
2011-10-09 6:03 ` Mike Galbraith
2011-10-09 14:26 ` Robert Kubrick
2011-10-09 17:38 ` Valdis.Kletnieks [this message]
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