Minor CPU Overclocking on N810?
 

I'm rather a bit of a noob with this device, but I am familiar with most of the in's-and'out's of CPU overclocking. I was snooping around some of configurations and hidden files on my N810 last night and found certain things that seemed to regulate how the N810 operates and makes use of the CPU. What I commonly found was many files stating that the Clock speed was "400000" (400GHz), and was wondering if modifying this value a little higher (such as "460000" as a test value) would actually cause the N810 to clock-up the CPU a bit, or if it would require a Reflash (if not burning it out), or if any difference would be noticeable at all.. Also, I found other config files in the same area that had different governor values as well as incremental clock values ("125000 250000 355000 400000" if im not mistaken), which I think it associates to different clock states such as on-demand, powersave, null, and performance modes.

I found these files in "/sys/devices/system/gpu/cpu0/cpufreq" using midnight commander.

The configuration files listed are:
cpuinfo_cur_freq (lists the current frequency the CPU is operating at. Usually displays as "400000" unless there is a heavy load, then somtimes its drops to "355000")

cpu_max_freq (always displays as "400000")

scaling_available_frequencies (lists the various clock speeds for the different cpu mode settings)

Theres a governor file that seems to associate with the scaling frequencies.

scaling_cur_freq The current optimal frequency the CPU appears to be scaled to

scaling_driver Always set to OMAP (obviously..)

scaling_max_freq Displays as "400000" in correlation to the "scaling_available_freq" maximum listed value in the file

scaling_min_freq Correlates to the lowest listed value in the "scaling_available_freq" file.


**So I just posted that to give an Idea of the values im asking about, in terms of what i may or may not be able to tweak. Basically im wondering if there is a way that modifying these basic values will actually alter the clock speed and overall performance of my system. The reason I want to speed up my system is that Theres a couple things that I would like to run certain applications such as Debian LDXE, VGBA, and certain pages in browser that bog down the system alot, and I haven't really found any reliable and accurate way to boost performance on the system. So I was thinking that these files and values looked very similar to the things you would alter in overclocking the FSB of a normal PC, or overclocking a GPU.. Just thought I would ask so as to avoid turning my IT into a PW (paperwieght lol).

Re: Minor CPU Overclocking on N810?
 

Considering people are overclocking other ARM processors quite regularly (google around for GP2X overclocking), it should be possible from a hardware standpoint, the kernel/software is a different question, though, not sure if it's easy enough to do via procfs or sysfs, or if the powersave functionality will play nice with a higher clock rate. As for bricking, the risk is always there with almost any overclock. A few lockups are almost certain, but if you go too high for too long it might get permanent :)

Re: Minor CPU Overclocking on N810?
 

Consider also the fact that N8x0 are already overclocked to 400MHz as of Chinook. The original speed was 330MHz i think.

Re: Minor CPU Overclocking on N810?
 

They were downclocked to 330 - the original is 400.

(Nokia switched to the 400/133(?) CPU/DSP OP mode in OS2008's kernel as opposed to 330/200 in OS2007.)

Re: Minor CPU Overclocking on N810?
 

does the GP2X apply to overclocking the ARM processor in the N810 itself, or is that ARM in general? (I.E. Windows Based PDAs such as the IPAQ)

Re: Minor CPU Overclocking on N810?
 

The N8x0 cannot be safely overclocked. Something to do with cache or memory timings that would fry stuff. Igor elaborated about it in a thread somewhere.

Re: Minor CPU Overclocking on N810?
 

Okay. So is there any way to increase the performance of the N810 at all? Im still a noob with it so I'm not too sure how I would go about doing it..

Re: Minor CPU Overclocking on N810?
 

I wish my n800 ran at 400GHz

Re: Minor CPU Overclocking on N810?
 

haha yeah i realized that i put GHz instead of MHz... That would be pretty much amazing if it could run at that speed haha.. The ultimate computer system.

Re: Minor CPU Overclocking on N810?
 

Also, overclocking will increase power consumption. Battery life will decrease and may heat with all the n810.

BUT, I'm not an expert and I'm talking of my experience with a Ipaq. There are apps for windows mobile that can downcloak CPU to increase battery life. An app like that may exist for n810 and also can be modified to do both over and downcloak, but I say it again I am not an expert. Also, I don't own a N810, but I think I will have one soon.