maemo.org - Talk - Has anyone overclocked their CPU to death yet?

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- - Has anyone overclocked their CPU to death yet? (https://talk.maemo.org/showthread.php?t=51811)

Re: Has anyone overclocked their CPU to death yet?

Quote:

Originally Posted by deprecated (Post 747719)

I'd like to score a burned out N900 for spares, mainly LEGIT housing parts, not the cheap cloned plastic junk on ebay.

But, from my experiences, the little thing is pretty resilient. I've had NO issues - EVER - running mine every single day with a 250MHz lower / 1150MHz upper threshold, slightly volt tweaked (250:26 up to 1150:70), smartreflex off, ignore nice load on, up_threshold at 80 and the sampling rate turned up to 200000.

Very fast clock scaling, very fast sampling, saves a good deal of battery... plus it barely ever gets warm (only when charging).

So, to sum it up, good luck seeing a dead N900 for salvage that was made dead by overclocking alone. You'd have to do a lot more to kill it.

A bit off-topic, but do you mind describing what 250:26 means, and why you changed it to 1150:70, and it appears to be a big jump. Also, why turn off smartreflex? What is nice load on? What is up_threshhold, and is the sampling rate the rate at which the cpu 'checks' for activity, so faster sampling rate could be related to a 'revvier' engine?

I thought more sampling by the cpu would consume more battery?

Thank you :)

Re: Has anyone overclocked their CPU to death yet?

Quote:

Originally Posted by geneven (Post 747715)

No.No.No.No.

Edit:

Why don't you just watch the Overclocking thread? If one is lost, it will be reported there.

Ok, Good idea :)

Re: Has anyone overclocked their CPU to death yet?

Quote:

Originally Posted by noipv4 (Post 715543)

Hey Jaakiman,

Which wireless router are you connected with? Any special settings on the router? DD-WRT firmware?

Thanks

Was that question directed at me? Not sure why you want to know my router. :confused:

Re: Has anyone overclocked their CPU to death yet?

Quote:

Originally Posted by SAABoy (Post 747730)

250:26/1150:70 = clock:voltage, I think the 'stock' for the ideal voltage setting in the power kernel is at 250:30. Basically I pushed it down as far as I could (per step) until it was unstable, then pushed it back up by a value of 2. Less voltage across the board.

Essentially, the sampling rate relies on how you use the device, if you have prolonged periods of 'idle' tame, it'd make sense to tighten up your sampling rate. In contrast, if you have frequent periods of moderate to high load on your N900, increasing the sampling rate will increase the rate (in milliseconds) at which the governor checks the current frequency. It will scale up if the utilization is above the percentage you have set in up_threshold, or lowers the frequency if the percentage is below what you have set.

To answer your question about smartreflex, I've never had luck with my device being stable with smartreflex on.

Re: Has anyone overclocked their CPU to death yet?

deprecated could u provide a guide to ur mods to speeding up the the n900
they seem really legit, much different does the stock n900 feel compared to your tweaked version
what tweak helped the most?
how did u change the custom voltages and threshold?
wouldn't increasing sampling rate decrease battery life tho?
whats nice cload?

Re: Has anyone overclocked their CPU to death yet?

Quote:

Originally Posted by yodawg (Post 747814)

A bit off-topic, but sure - no problem. :)

I just installed the latest power kernel, loaded the 'ideal' kernel configuration after rebooting, saved the config to /home/user/.kernel, and hand modified it with nano (you need nano installed):

kernel-config load ideal
kernel-config limits 250 1150 <- set it to your minimum and maximum required frequencies
kernel-config save whateveryouwant
nano /home/user/.kernel/whateveryouwant

give it whatever parameters you need, modify the voltages directly after the frequencies, change your sampling rate and threshold as desired, disable what you want.

save it with ctrl+x, hit 'y', enter

kernel-config load whateveryouwant
kernel-config default whateveryouwant

reboot your device and give it a minute, poking around to see how things respond for you.

Also, what helps me the most is modifying /etc/init.d/rcS to reflect more sanity for mobile devices:

find '/proc/sys/vm/swappiness' in /etc/init.d/rcS

change that line to read:

echo 50 > /proc/sys/vm/swappiness

change /proc/sys/vm/page-cluster to:

echo 0 > /proc/sys/vm/page-cluster

I've also been experimenting with swapping from a class 6 microsd card rather than the internal swap partition, by using a script in /etc/event.d to perform the following:

swapoff /dev/mmcblk0p3
swapon /dev/mmcblk1p2 (my swap partition on my microsd card)

I've noticed the device is generally more snappy. Let me know if you need any more details. Cheers.

Addendum: if you'd like my configs, let me know via private message, would be glad to share. Also, dscobsct's second revision of transitions.ini was most helpful in making my N900 feel slippery fast.

Re: Has anyone overclocked their CPU to death yet?

I don't think it's possible if device overheats it shuts down. If you overclock too high it will also shut down. Sorry to disappoint you.

Re: Has anyone overclocked their CPU to death yet?

Quote:

Originally Posted by jakiman (Post 652478)

Currently, the most common overclock is with idle clock of 500Mhz. (default is 250Mhz) Mine is running at 500 - 1000Mhz. Sometimes, I do clock it up to 1.1Ghz.

From Overclocking WIki

Battery life has never been better. I've had this phone for 6 months now and first 3-4 months without overclocking. Battery lasted much shorter back then than now with overclocking. (mine easily lasts over 24 hours with around 4 hours of web browsing over wifi/3g, some phone calls and sms etc) (During idle, it only loses around 10% every 6 hours while being connected to wifi)

Most recent advancements in overclocking the N900 include super low voltages. In turn, it consumes less power. If you have a lucky N900, you can run the CPU at 850Mhz at a lower voltage than stock N900 at 500Mhz. (seems most N900's can do this)

hey jakiman, can you tell me what exactly are your settings on the overclock?

Re: Has anyone overclocked their CPU to death yet?

Quote:

Originally Posted by deprecated (Post 747830)

aha!i see youve made a partition on your micro sd for a little more ram huh?(btw if i chose to make those commands..wont i lose all my memory in the micro sd?)
btw, can you explain what rcS and swappiness is for ??
and could you give us a detailed step by step procedure on YOUR current config?INCLUDING the voltages and everything!(i would like to try 1 ghz now :P..
since 850 seems stable for 10 hours..then it seems as if its back to 600 mhz at stock kernel!!

Re: Has anyone overclocked their CPU to death yet?

Quote:

Originally Posted by mangal_sk8erboy (Post 747874)

hey jakiman, can you tell me what exactly are your settings on the overclock?

I currently use ulv profile for voltage and max limit set to 1000.

kernel-config load ulv
kernel-config limits - 1000
kernel-config save ulv_1000

thats's it. I used to run at 1100 but now 1000 as I don't need it for now.
I also use ulv instead of ideal in hope to be more stable all day long.

Not doing anything extra fancy.

oh. I use d-livil's Blac Plastic theme 2.x which has an awesome custom transition that makes everything feel much snappier as well.