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Poll: Do you think its possible to overclock the N900?!
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Do you think its possible to overclock the N900?!

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titan is offline titan
2010-04-07 , 21:16
Posts: 946 | Thanked: 1,650 times | Joined on Oct 2009 @ Germany
#1631
Originally Posted by thecube View Post
yeahh :-)
Post 600000
what a coincidence! we are just fighting with the damn 600000 Hz limit!
 
Rushmore is offline Rushmore
2010-04-07 , 21:17
Posts: 1,255 | Thanked: 393 times | Joined on Oct 2009 @ US
#1632
Are we sure about Conky being accurate? I still notice that 160kb MP3's being played by the built-in media player report:

1. Clock = 125mhz, 500mhz and 800 mhz (fluctuates, but mainly on 125)
2. CPU usage does not deviate from 50% to 53% (4 point range)

Usage seems to not correlate well with what the clock is reporting at the same time. Why go from 125mhz and up to 800mhz, yet usage never deviates from within four point of 50%.
 
CraigRobbo is offline CraigRobbo
2010-04-07 , 21:18
Posts: 175 | Thanked: 41 times | Joined on Mar 2010
#1633
I am on my 3rd day of using 900mhz kernal - been pushing it with emulators, apps music etc...running great and no problems at all.
 
titan is offline titan
2010-04-07 , 21:19
Posts: 946 | Thanked: 1,650 times | Joined on Oct 2009 @ Germany
#1634
Originally Posted by titan View Post
I did some tests with a kernel that has 601MHz instead 600MHz in the table of supported frequencies.
booting with 700MHz worked fine until I made a call - it switched to 600MHz ;-(
brief summary:
phone application sets the frequency to the next available frequency >= 600MHz during phone calls.
If you use one of the hardcoded kernels with high frequencies you're phone is at the max. freq. during the phone call and overheats!
with my kernel the frequency during phone calls is 600Mhz as with the stock kernel. However, it is not reset to the user-specified max. freq after the call.

EDIT: with SIP >=600MHz lock is only during call initiation, during the call it is 500Mhz.

my next experiment is to keep the 601Mhz settings and ignore all requests to change to 600MHz, i.e. during calls it would not fix it to >= 600MHz.
Last edited by titan; 2010-04-07 at 21:35. Reason: difference, correction
 

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rpgAmazon is offline rpgAmazon
2010-04-07 , 21:20
Posts: 146 | Thanked: 119 times | Joined on Jan 2010 @ Spain
#1635
Confused: Lehto's one phone call are at 600 or 950 (my case) clocked?
No matter for me, lots of very short calls... but if Lehto calls=950 mhz then Titan+Lehto works equals to allways working clock selection, I'm right?
 
zlatokosi is offline zlatokosi
2010-04-07 , 21:26
Posts: 242 | Thanked: 269 times | Joined on Mar 2010
#1636
Originally Posted by Lehto View Post
This MIGHT possibly explain the reason why one user reported that the phone calls worked more smoothly with my crude OC kernel. As for that thing the min and max will be the maximum speed during phone call (bye bye battery life!).
Woooaaa, hold on. So if I understand this correctly, cpu is constantly at 600 mhz during phonecalls (or only when initiating a phonecall?). If that's the case, wouldn't longer phonecalls (1 hour+) be dangerous for the cpu, according to Nokia? Maybe that is why they advise against oc's and why the standard kernel maxes at 600. Now that I wrote that, it really doesn't make sense, since even on oc'd kernels the value decreases back to 600...

Thanks again for the kernels, Lehto and Titan.
 
UNderworld is offline UNderworld
2010-04-07 , 21:28
Posts: 362 | Thanked: 113 times | Joined on Feb 2010
#1637
I just opened up conky and made a phone call... with stock clocks - it was 600, went to 500, then 250.... during the call.....

but stayes on 500mhz during skype call :S
 
egoshin is offline egoshin
2010-04-07 , 21:30
Posts: 992 | Thanked: 995 times | Joined on Dec 2009 @ California
#1638
Originally Posted by titan View Post
I noticed that during the call both min and max are set to 600Mhz (using console via ssh).
after the call the minimum is reset to 250MHz.
can someone confirm that during extended phonecalls, even with the stock kernel,
scaling_min_freq, scaling_max_freq and scaling_cur_freq are 600000?

it would mean that Nokia keeps your device at the dangerous 600MHz during an entire extended phone call!
Calling is overclocking!
Stock PR1.1 kernel, before call:

# cat scaling_min_freq scaling_max_freq scaling_cur_freq cpuinfo_min_freq cpuinfo_max_freq cpuinfo_cur_freq
250000
600000
250000
250000
600000
249600

During call:

# cat scaling_min_freq scaling_max_freq scaling_cur_freq cpuinfo_min_freq cpuinfo_max_freq cpuinfo_cur_freq
250000
600000
250000
250000
600000
249600

Got via WiFi ssh.

EDIT: I have set value "1" in "ondemand/ignore_nice_load" to prevent tracker from eating battery (testing it).

EDIT2: I also have both sr_vdd1_autocomp and sr_vdd2_autocomp set to "1".
Last edited by egoshin; 2010-04-07 at 21:39.
 
Lehto is offline Lehto
2010-04-07 , 21:31
Posts: 126 | Thanked: 327 times | Joined on Nov 2009 @ Finland
#1639
Originally Posted by zlatokosi View Post
Woooaaa, hold on. So if I understand this correctly, cpu is constantly at 600 mhz during phonecalls (or only when initiating a phonecall?). If that's the case, wouldn't longer phonecalls (1 hour+) be dangerous for the cpu, according to Nokia? Maybe that is why they advise against oc's and why the standard kernel maxes at 600. Now that I wrote that, it really doesn't make sense, since even on oc'd kernels the value decreases back to 600...

Thanks again for the kernels, Lehto and Titan.
No idea. I'll publish a set of low voltage 800mhz kernels in near future on my fantastic iPad compatible website. This should effectively prevent some of the heat problems (however these kernels wont work for everyone!)

My AWESOME website.
 

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titan is offline titan
2010-04-07 , 21:33
Posts: 946 | Thanked: 1,650 times | Joined on Oct 2009 @ Germany
#1640
correction: with SIP >=600MHz lock is only during call initiation, during the call it is 500Mhz.
 
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