Date: Mon, 29 Aug 2005 22:08:25 -0700 From: Nate Lawson <nate@root.org> To: Bruno Ducrot <bruno@poupinou.org> Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, Hajimu UMEMOTO <ume@FreeBSD.org>, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/usr.sbin/powerd powerd.c Message-ID: <4313E9C9.5050508@root.org> In-Reply-To: <20050829073821.GI7749@poupinou.org> References: <200508240752.j7O7qxep016309@repoman.freebsd.org> <ygemzn7zivx.wl%ume@mahoroba.org> <yge8xyr5zjq.wl%ume@mahoroba.org> <43129EE6.7040608@root.org> <20050829073821.GI7749@poupinou.org>
next in thread | previous in thread | raw e-mail | index | archive | help
Bruno Ducrot wrote: > On Sun, Aug 28, 2005 at 10:36:38PM -0700, Nate Lawson wrote: > >>Another mitigating factor is a patch I hope to commit soon that removes >>levels that aren't useful. The general idea is the same as a recent >>email from Tijl Coosemans but my approach is different. > > > I'm pretty sure it's incorrect to add p4tcc and acpi_throttle for power > saving purpose. I plan to add some flags in order to use only relevant > frequencies to this end, but IMHO that should be done at low-level > drivers. On the other hand, it is usefull to keep the existing sysctl > freqs, but for cooling purpose only. I think throttling, whether via p4tcc or acpi_throttle, is a useful addition to absolute frequency control (i.e. est or powernow). With appropriate tuning, as I hope the patch I committed provides, the additional levels should be helpful. -- Nate
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4313E9C9.5050508>