Date: Mon, 26 Sep 2005 15:31:39 +0200 From: Bruno Ducrot <ducrot@poupinou.org> To: Kevin Oberman <oberman@es.net> Cc: Brian <kansascity_guy2005@yahoo.com>, freebsd-mobile@freebsd.org Subject: Re: Speed Steping hw.acpi.cpu.cx_support Message-ID: <20050926133139.GI21906@poupinou.org> In-Reply-To: <20050926024910.C989B5D07@ptavv.es.net> References: <20050925214116.59928.qmail@web32809.mail.mud.yahoo.com> <20050926024910.C989B5D07@ptavv.es.net>
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On Sun, Sep 25, 2005 at 07:49:08PM -0700, Kevin Oberman wrote: > > Does any one know how to config speed steping. > > > > sysctl output > hw.acpi.cpu.cx_support: > > C1/1 C2/1 C3/85 > > hw.acpi.cpu.cx_support C1 > > hw.acpi.cpu.cx_support 100.00% 0.00% 0.00% > > Add th line: > performance_cx_lowest="LOW" > to /etc/rc.local. To get C3, you must run without USB drivers and, with the numbers you quoted, C2 is not going to buy you much. Except that Cx stuff have absolutely nothing to do with speed steping. The Cx states are some power states entered by the processor in the idle loop. The higher is less power hungry at the cost of more latency to leave this power state. -- Bruno Ducrot -- Which is worse: ignorance or apathy? -- Don't know. Don't care.
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