Date: Wed, 18 Aug 2004 08:21:41 +0200 From: Patrick Hurrelmann <outi@bytephobia.de> To: anton@nikiforov.ru Cc: freebsd-mobile@freebsd.org Subject: Re: Enhanced SpeedStep driver available Message-ID: <20040818082141.5d2fcee7@duality.bytephobia.de> In-Reply-To: <4122A34F.2020607@nikiforov.ru> References: <6.1.0.6.1.20040816074348.03f99338@popserver.sfu.ca> <20040817234314.GA31323@laptoxa.toxa.lan> <4122A34F.2020607@nikiforov.ru>
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On Wed, 18 Aug 2004 04:31:11 +0400 Anton Nikiforov <anton@nikiforov.ru> wrote: > Toxa wrote: > > On Mon, Aug 16, 2004 at 08:06:30AM -0700, Colin Percival wrote: > > > >> Thanks to everyone who has been sending me data about their > >>processors (and in particular, the 90nm versions), I now have > >>a first draft of a Enhanced SpeedStep driver available. For > >>people with the appropriate processors (Pentium M only), this > >>makes it possible to adjust the cpu frequency via a new sysctl > >>(hw.est_curfreq), and have the cpu voltage adjusted at the > >>same time. > >> I've also put together a very simple control daemon which > >>reads kern.cp_time every second and adjusts the cpu frequency > >>based on the fraction of cpu time which is idle. This increases > >>my laptop's battery life by around 40%. > >> All the code is online at > >>http://www.daemonology.net/freebsd-est/ > >> Assuming I don't hear any major bug reports in the next few > >>days, I'll package these into ports and hopefully get them into > >>the ports tree in time for 5.3-RELEASE. > > > > > > I'm curious about processor's name. My laptop (sony vaio pcg-v505bx) has a Pentium 4 M, but not Centrino (which name is... Pentium 4 M too), afaik it's capable to support speedsted, (enhanced or not?). When loading your module: > > > > [(3:40)(85.32%)(p1):~/tmp/est ] sudo kldload ./est.ko > > [(3:40)(85.32%)(p1):~/tmp/est ] kldstat|grep est > > 27 1 0xc23cd000 2000 est.ko > > [(3:40)(85.32%)(p1):~/tmp/est ] sysctl hw.est_curfreq > > [(3:40)(85.32%)(p1):~/tmp/est ] sysctl hw.est_freqs > > hw.est_freqs: > > > > e.g. nothing > > Is this for Centrino processors only? > > > > p.s.: from dmesg: > > > > CPU: Mobile Intel(R) Pentium(R) 4 - M CPU 2.00GHz (1193.11-MHz > > 686-class CPU) > > Origin = "GenuineIntel" Id = 0xf27 Stepping = 7 > > Features=0xbfebf9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> > > > I have COMPAQ Presario 2585 and have absolutley the same problem. > My processor also supports for speedstep and dmesg looks like: > #dmesg|grep CPU > CPU: Mobile Intel(R) Pentium(R) 4 CPU 2.30GHz (2224.01-MHz 686-class > CPU) > in the est.c code i found out the followig: > ....... > err = kernel_sysctlbyname(curthread, "hw.model", hwmodel, > &modellen, NULL, 0, NULL); > ....... > if (strncmp(hwmodel, "Intel(R) Pentium(R) M processor", 31) > > but my sysctl hw.model returns > hw.model: Mobile Intel(R) Pentium(R) 4 CPU 2.30GHz > The same as in dmesg. Changing the code to find a substring Mobile in > hw.model delivers system stuck at the module load time. > Guys... Pentium 4 M is the mobile version of a Pentium 4 and capable of speed step. Pentium M is a complete new processor and not a mobile version of any other. Indeed it is based on the Pentium 3 layout (but only based ;) ). Centrino is no processor at all. Centrino is the name for a hardware bundle: - Intel Pentium M (no Pentium 4!) - Intel Chipset (with or without onboard graphic) - Intel Wireless-LAN adapter If one of this partsis missing on a system it must not be called Centrino (that's Intel politics). I hope i could achieve clarification. This discussions are seen anywhere and many don't really know the diferences ;) If I'm wrong in any part, please let me know. -- =========================================================================== Patrick Hurrelmann | "Programming today is a race between software Mannheim, Germany | engineers striving to build bigger and better | idiot-proof programs, and the Universe trying outi at bytephobia.de | to produce bigger and better idiots. So far, www.bytephobia.de | the Universe is winning." - Rich Cook
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