Hi, AFAIK Crusoe is designed to run at low speed until the system asks for full power (eg: while doing nothing run at low speed to maximize battery life and minimize heating, while doing hard work switch to full speed to maximize performance). >From Transmeta site I can see that this cpu is windoze certified, that means >that windoze has a driver to handle crusoe power management and ask for more >power when needed. Linux still hasn't this kind of policy based PM for >P-states.
Take a look at ACPI and CPUFREQ patches. These are just my assumptions and perhaps not completely correct. Can somebody confirm? -- mattia On Thu, 5 Sep 2002 21:05:31 -0700 Jaye Inabnit ke6sls <[EMAIL PROTECTED]> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On Thursday 05 September 2002 06:24 pm, steve thompson wrote: > > I am running Debian 3.0 with the 2.4.18 kernel on a > > Fujitsu P-2040, which has > > a Transmeta Crusoe 800MHz processor and 256 > > MB of ram. The laptop also > > dual boots Windows XP. I was comparing processing > > times > > with the two operating systems on the same machine > > to run various calculations, random number > > generations, > > and graphics (using the same statistical program and > > version (in R) on both sides. What I find is, first, > > Linux > > will handle a much larger problem than XP. But for > > some intermediate sized problems, the total processing > > time was about 10 to 20 percent faster with XP. > > This discovery doesn't really surprise me after seeing how hard and well > Linux works on my systems. Another test, though this is about the most > processor intensive, is setiathome (try it for yourself for the sake of > science). My box currently completes a work unit every 3.5(ish) hours. > Fortunately, I don't have windows to compare it too! I started to run it on > my laptop while it is on AC power, but discovered it was getting dangerously > hot, even with the fan on. > > > This is in contrast to what I found with the desktop > > I work on, which has a similar setup with Debian 3.0 > > with the 2.4.18 kernel dual booting with Windows XP. > > There, as well as handling > > much larger problems, Linux does the processing > > consistently 20 to 80 percent faster. That machine > > has a Pentium IV 2.2 MHz processor and 1 GB of rdram. > > But in each case the comparison is within machine. > > Yes, but if your new processor is a Transmeta then it would seem like it is > living up to the company specifications, or at least that is what I have come > to understand. > > > What this makes me wonder is if Linux, or my > > particular > > configuration, may not be as efficient as it could be > > for the Crusoe. I do have something called "crusoe" > > enabled in the kernel configuration. And I installed > > a patch that people use to make DMA work with the > > P-2000 series. > > What does this patch actually do? I think Transmeta is attempting to make a > leaner chip that consumes less current, therefore causes less heat which > greatly extends the useful charge of each laptop power pack. So, does this > patch perhaps enable Linux to scale back a little to enable the chip's > performance characteristics? > > > Does anyone have any similar experience or advice > > regarding a laptop with the Crusoe? > > I don't, but your story is most assuredly grasping my attention! I hope you > can drop another mail as you learn more about what you own. > > > Incidently, I really like that processor for what I > > use this laptop for, even though it may not be the > > fastest. What I like, compared to my previous > > Pentium-based laptop, is the way it stays so quiet > > and cool while I work. But I am wondering if Linux > > might use this processor less efficiently than > > possible > > or if it is more likely something about my > > configuration. > > > > Steve > > gl Steve, > > tatah > - -- > > Jaye Inabnit\ARS ke6sls\/A GNU-Debian linux user\/ http://www.qsl.net/ke6sls > If it's stupid, but works, it ain't stupid. I SHOUT JUST FOR FUN. > Free software, in a free world, for a free spirit. Please Support freedom! > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.0.6 (GNU/Linux) > Comment: For info see http://www.gnupg.org > > iD8DBQE9eCmLZHBxKsta6kMRAv+mAKDZv4coQFC6Paa7dGT7pNq3tFlEEgCePzws > DkekgNWoVT5z/eZ3sXHMC3A= > =9KTA > -----END PGP SIGNATURE----- > > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] > >
