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Message-ID: <alpine.LRH.0.999.0710011612001.7353@www.tglx.de> Date: Mon, 1 Oct 2007 16:14:45 +0200 (CEST) From: Thomas Gleixner <tglx@...utronix.de> To: Mikhail Kshevetskiy <mikhail.kshevetskiy@...il.com> cc: Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org Subject: Re: Fwd: x86_64 and AMD with C1E On Mon, 1 Oct 2007, Mikhail Kshevetskiy wrote: > No, it boot and work normally. The only thing i bother, is the > additional 260 timer interrupts per seconds. > Here is short result: > > c1e enabled: > -- power consumption about 23 watts > -- there is only C1 power state enabled > -- there are about 260 timer interrupts per seconds > tested with x86_64(2.6.22, 2.6.23-rc8, 2.6.23-rc8-hrt1 ), > i386(2.6.21, 2.6.22, 2.6.23-rc5-hrt1) > > c1e disabled: > -- power consumption about 27 watts > -- there are no any power state enabled (including C1) > -- there are no additional 260 timer interrupts per seconds > tested with 2.6.23-rc6-hrt1/x86_64. > > I want to reduce the power consumption of my notebook. I see the 2 possibility: > -- remove 260 additional timer interrupts (c1e enabled case ) There is work in progress on a patch, which allows to utilize the hpet timers as per cpu timers. This should solve the problem. Be patient. Thanks, tglx - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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