From mboxrd@z Thu Jan 1 00:00:00 1970 From: dual_bereta_r0x Subject: Re: 2.6.2: P4 ClockMod speed Date: Mon, 16 Feb 2004 21:48:25 +0000 Sender: cpufreq-bounces@www.linux.org.uk Message-ID: <40313AA9.1060906@arenanetwork.com.br> References: <20040216213435.GA9680@dominikbrodowski.de> Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20040216213435.GA9680@dominikbrodowski.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: cpufreq-bounces+glkc-cpufreq=gmane.org@www.linux.org.uk Content-Type: text/plain; charset="iso-8859-1"; format="flowed" To: Dominik Brodowski Cc: linux-kernel@vger.kernel.org, cpufreq@www.linux.org.uk Dominik Brodowski wrote: > Hi, >=20 >=20 >>I have a P4 2.4 running @ 3.12GHz. >=20 >=20 > So you overclock your CPU but then throttle it down... strange, but wel= l... Actually it isn't throttled down, only sysfs is showing it with low=20 speed. It *is* running @ 3.12 (or /proc/cpuinfo and boot messages are=20 lying to me) when in full power. >>In 2.6.0, i could change it frequency=20 >>via speedfreqd(8) up to its actual speed. Since 2.6.1, its max speed is= =20 >>locked on cpu *real* speed. >=20 >=20 > It's just a change of appearance -- the cpufreq driver uses the theoret= ical > speed of the CPU for its calculations; the actual CPU speed isn't > affected. You can verify this by looking at /proc/cpuinfo which still t= ells > 3124.376 MHz. >=20 > By doing so it becomes easier to enter different frequencies e.g. into > /sys/devices/system/cpu/cpufreq/scaling_setspeed -- on my desktop, typi= ng in > 1200000 is easier than 12121224... [*] Sure but if i want to downgrade it, for example, by night, to a lower=20 speed, and then next day return it to full power? Will I stuck at 2.4GHz? > Dominik >=20 > [*] The _actual_ CPU speed should be used on all cpufreq drivers where = this > specific CPU frequency has implications to external components, e.g. LC= D, > memory or pcmcia devices. Where only the _frequency ratio_ is of import= ance > [for loops_per_jiffy and friends] such "rounding" is acceptable, as lon= g as > the ratio is constant. Indeed. I'll showing in LCD a lower speed than the running. --=20 dual_bereta_r0x -- Alexandre Hautequest ArenaNetwork Lan House & Cyber -- www.arenanetwork.com.br Tr=EAs an=E9is para os Reis =C9lficos sob este c=E9u, Sete para os Senhores-An=F5es em seus rochosos corredores, Nove para Homens Mortais, fadados ao eternos sono, Um para o Senhor do Escuro em seu escuro trono Na Terra de Mordor onde as Sombras se deitam. Um Anel para a todos governar, Um Anel para encontr=E1-los, Um Anel para a todos trazer e na escurid=E3o aprision=E1-los Na Terra de Mordor onde as Sombras se deitam.