Phoronix IRC Log: 2010-01-14
Ivanovic: michaellarabel: another spambot: http://www.phoronix.com/forums/showthread.php?t=21422
contrast: Greets, everyone...
contrast: I just got my first build up and running last night and I'm having some trouble overclocking my CPU in Linux. Any takers? =D
Ivanovic: you do it via the mainboard anyway
Ivanovic: not via some software in the system
contrast: (Yes, I know OCing is done in the BIOS - that seemed to go fine, but once I'm in Linux, /proc/cpuinfo is reporting the stock frequency - 2.66GHz.)
contrast: Sorry, should've mentioned all that up front.
Ivanovic: cpuinfo just reads out the data provided by the cpu
Ivanovic: it does not have to have the correct value
Ivanovic: that is: is your box under load?
Ivanovic: unless it is under 100% load (on every core) it might be that the cpu simply is in some energy saving mode
contrast: Ahh... Well, for testing purposes, I set the scaling mode to Performance, which is supposed to have it running at full speed all the time.
contrast: But, I'll try putting it under load and checking... What do you recommend for seeing what it's clocked at, if not /proc/cpuinfo?
Ivanovic: how have you overclocked?
Ivanovic: and: what is your cpu?
Ivanovic: if you tried to overclock using the multiplier: most cpus are locked and don't allow increasing the multiplier
contrast: C2D E6750, from stock 2.66GHz to 2.92
Ivanovic: for those you have to increase the fsb
Ivanovic: (or however it is called these days)
contrast: Left the multiplier alone, increased the FSB.
contrast: The setting sticks in the BIOS, which leads me to believe I've done things correctly on that end, although I'm a virgin with this stuff, so I'm open to suggestions. haha
contrast: (Raised the bus from its default of 333MHz to 366MHz, multiplier was set to 8 by default, which I left alone.)
contrast: I had read somewhere that CPU frequency scaling usually needs to be completely disabled in the OS for OCing to go smoothly. Any ideas on how to do that?