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OdinsDream
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Joined: 01 Jun 2002
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 Posted: Sun Jan 12, 2003 11:11 pm Post subject: /proc/cpuinfo shows incorrect MHz for Pentium 800 |
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I've got an IBM Thinkpad with an 800mhz pentium, it's been running just fine for months. Tonight I was installing VMWare to house a Win2k installation. When I ran the wizard, I got an error message that my processor is probably not powerful enough, and that at least a 266 is recommended. That's strange, I thought... 800 isn't more than 266?
So, I checked /proc/cpuinfo and sure enough, it said I had a 176mhz processor. That didn't make any sense at all. So, I rebooted, looked in the BIOS, and I see what I expect, 800MHz Pentium.
After that reboot, /proc/cpuinfo now shows 647.199MHz. That's a little better, but, still, what's happening here? Why am I not getting something at least close to 800? |
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steveb
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Joined: 18 Sep 2002
Posts: 4564
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| Posted: Sun Jan 12, 2003 11:40 pm Post subject: Re: /proc/cpuinfo shows incorrect MHz for Pentium 800 |
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| OdinsDream wrote: | I've got an IBM Thinkpad with an 800mhz pentium, it's been running just fine for months. Tonight I was installing VMWare to house a Win2k installation. When I ran the wizard, I got an error message that my processor is probably not powerful enough, and that at least a 266 is recommended. That's strange, I thought... 800 isn't more than 266?
So, I checked /proc/cpuinfo and sure enough, it said I had a 176mhz processor. That didn't make any sense at all. So, I rebooted, looked in the BIOS, and I see what I expect, 800MHz Pentium.
After that reboot, /proc/cpuinfo now shows 647.199MHz. That's a little better, but, still, what's happening here? Why am I not getting something at least close to 800? |
you have a ibm thinkpad wich has a intel speedstep technology aware cpu/chipset.
this means, that your thinkpad is able to controll the speed of your processor, for saving battery power.
if you need full speed, then disable this functionality in the bios.
cheers
SteveB |
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OdinsDream
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Joined: 01 Jun 2002
Posts: 1057
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| Posted: Sun Jan 12, 2003 11:45 pm Post subject: Re: /proc/cpuinfo shows incorrect MHz for Pentium 800 |
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| steveb wrote: | | OdinsDream wrote: | I've got an IBM Thinkpad with an 800mhz pentium, it's been running just fine for months. Tonight I was installing VMWare to house a Win2k installation. When I ran the wizard, I got an error message that my processor is probably not powerful enough, and that at least a 266 is recommended. That's strange, I thought... 800 isn't more than 266?
So, I checked /proc/cpuinfo and sure enough, it said I had a 176mhz processor. That didn't make any sense at all. So, I rebooted, looked in the BIOS, and I see what I expect, 800MHz Pentium.
After that reboot, /proc/cpuinfo now shows 647.199MHz. That's a little better, but, still, what's happening here? Why am I not getting something at least close to 800? |
you have a ibm thinkpad wich has a intel speedstep technology aware cpu/chipset.
this means, that your thinkpad is able to controll the speed of your processor, for saving battery power.
if you need full speed, then disable this functionality in the bios.
cheers
SteveB |
Wow, it pulls it down to 176? I'll try and get a little more info on this stuff, as I'd really like to keep the powersaving options, but still have the ability to turn it off for intensive tasks (like running VMWare). Perhaps there's some tools to get this done. Thanks for the hint though. |
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BlackBart
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Joined: 07 Oct 2002
Posts: 252
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| Posted: Mon Jan 13, 2003 12:02 am Post subject: |
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| many laptops have function keys for doing things like that |
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steveb
Advocate
Joined: 18 Sep 2002
Posts: 4564
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| Posted: Mon Jan 13, 2003 12:13 am Post subject: Re: /proc/cpuinfo shows incorrect MHz for Pentium 800 |
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| OdinsDream wrote: | | Wow, it pulls it down to 176? I'll try and get a little more info on this stuff, as I'd really like to keep the powersaving options, but still have the ability to turn it off for intensive tasks (like running VMWare). Perhaps there's some tools to get this done. Thanks for the hint though. |
yes! i have a tp a22p and it goes up and down with the speed....
check out (speedstep stuff/cpu frequency stuff):
http://www.goof.com/pcg/marc/speedstep.html
http://www.brodo.de/cpufreq/
check the thinkpad tools aswell (you can controll with the Fn key the power expenditure mode):
http://tpctl.sourceforge.net/
you can emerge them by doing: | Code: | | emerge sys-apps/thinkpad |
if i remember right, you can check the speed on a speedstep computer (the technique is in the newer kernel versions available)
current speed: | Code: | | cat /proc/sys/cpu/0/speed |
max speed: | Code: | | cat /proc/sys/cpu/0/max-speed >/proc/sys/cpu/0/speed |
min speed: | Code: | | cat /proc/sys/cpu/0/min-speed >/proc/sys/cpu/0/speed |
cheers
SteveB |
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TripKnot
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Joined: 29 May 2002
Posts: 213
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| Posted: Mon Jan 20, 2003 2:04 pm Post subject: |
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I have a Dell Inspiron 800MHz laptop and recently noticed the 176MHz thing too. It was from a BIOS option that enabled a "COMPATIBLE" boot speed for time-sensitive apps or something. This option overrides the 800/650 regular AC/Batt speed step settings.
Perhaps you have something like this too. |
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