From: Victor Condino <un1tz3r0@gmail.com>
To: user-mode-linux-devel@lists.sourceforge.net
Subject: [uml-devel] host cpu frequency scaling and guest bogomips
Date: Tue, 12 Jul 2005 01:26:53 -0400 [thread overview]
Message-ID: <42D3549D.50308@gmail.com> (raw)
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just noticed something interesting while testing out my gentoo/uml
root-fs generation script on my laptop. my l/t is an thinkpad T42p,
which has a p3 centrino with speedstep. i use cpufreqd to throttle the
cpu when not on ac between 600 and 1800MHz based on load. what i noticed
is that when I fired up UML while the host's core frequency was at
600mhz, /proc/cpuinfo reported ~600 bogomips in the guest, but when i
put some load on the host and cpufreq stepped up the core frequency, UML
still reports ~600 bogomips. likewise, when I fired up UML while the
host was under load and it's core at 1200MHz, UML reports higher
bogomips, but then when the host drops back down to the lower core freq,
UML still reports the same higher bogomips.
Not that this actually affects anything I do or would affect most
people... just thought you guys might want to know =D
- - V. Condino
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next reply other threads:[~2005-07-12 5:28 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-12 5:26 Victor Condino [this message]
2005-07-12 15:56 ` [uml-devel] host cpu frequency scaling and guest bogomips Blaisorblade
2005-07-12 16:25 ` Victor Condino
2005-07-12 16:35 ` Geert Uytterhoeven
2005-07-12 17:14 ` Blaisorblade
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