Date: Sun, 30 Oct 2005 14:39:40 +0800 From: David Xu <davidxu@freebsd.org> To: freebsd-current@freebsd.org Cc: Alexander Leidinger <Alexander@Leidinger.net> Subject: Re: TSC instead of ACPI: powerd doesn't work anymore (to be expected?) Message-ID: <43646AAC.2080107@freebsd.org> In-Reply-To: <20051029195703.GB39253@dragon.NUXI.org> References: <30595.1130493297@critter.freebsd.dk> <20051028153457.d0wqgn2ask4sgw4k@netchild.homeip.net> <20051029195703.GB39253@dragon.NUXI.org>
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David O'Brien wrote: >On Fri, Oct 28, 2005 at 03:34:57PM +0200, Alexander Leidinger wrote: > > >>I don't have the message at hand. I just had time to write the mail, but I >>don't have my laptop with me to reproduce the message. But it's easy to >>reproduce, just take a PC which is able to make use of powerd and switch to >>using TSC as the timecounter. >> >> > >What is the motivation to use the TSC as a timecounter? > > > TSC is faster than any others, on many systems, so-called ACPI-fast timer is really a slow chip, at least far slower than reading from RAM, manufactories just lie on this. Regards, David Xu
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