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2010-04-04
, 06:32
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Posts: 310 |
Thanked: 383 times |
Joined on Jan 2010
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#102
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Hey titan,
I've been playing with the overclocking stuff in this thread:
http://talk.maemo.org/showthread.php...ight=overclock
I'm running my n900 with a max frequency of 900mhz (300 / 450 / 600 / 900 timings), and the difference is incredible (rock solid after 15 minutes of bzip2 + web/flash rendering). Any chance you could release an overclocking kernel with these timings?
I'm building my own at the moment, as the stock kernel in the other thread is old and lacks all the great modules you've included. Be handy if it was in your mainline though.
Min/max speeds can be controlled via sysfs as well, so a max of 600mhz could be as default, with interested users able to enable 900mhz with a simple command.
Last edited by nightfire; 2010-04-04 at 06:37.
I've been playing with the overclocking stuff in this thread:
http://talk.maemo.org/showthread.php...ight=overclock
I'm running my n900 with a max frequency of 900mhz (300 / 450 / 600 / 900 timings), and the difference is incredible (rock solid after 15 minutes of bzip2 + web/flash rendering). Any chance you could release an overclocking kernel with these timings?
I'm building my own at the moment, as the stock kernel in the other thread is old and lacks all the great modules you've included. Be handy if it was in your mainline though.
Min/max speeds can be controlled via sysfs as well, so a max of 600mhz could be as default, with interested users able to enable 900mhz with a simple command.
Last edited by nightfire; 2010-04-04 at 06:37.
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2010-04-04
, 10:41
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Posts: 946 |
Thanked: 1,650 times |
Joined on Oct 2009
@ Germany
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#103
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yes, I've seen the overclocking thread.
If it's possible I'd keep the default 600MHz as max (for stability) but give users the possibility to manually fry their device at 1GHz.
http://talk.maemo.org/showpost.php?p...&postcount=509
the main problem is that the max freq cannot be set as a boot parameter
unlike in previous kernel versions http://lwn.net/Articles/11548/
If it's possible I'd keep the default 600MHz as max (for stability) but give users the possibility to manually fry their device at 1GHz.
http://talk.maemo.org/showpost.php?p...&postcount=509
the main problem is that the max freq cannot be set as a boot parameter
unlike in previous kernel versions http://lwn.net/Articles/11548/
Originally Posted by nightfire
I've been playing with the overclocking stuff in this thread:
Any chance you could release an overclocking kernel with these timings?
Min/max speeds can be controlled via sysfs as well, so a max of 600mhz could be as default, with interested users able to enable 900mhz with a simple command.
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2010-04-04
, 11:28
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Posts: 151 |
Thanked: 82 times |
Joined on Sep 2008
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#104
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Originally Posted by titan
What about a (125-900)Mhz variant? ...
yes, I've seen the overclocking thread.
If it's possible I'd keep the default 600MHz as max (for stability) but give users the possibility to manually fry their device at 1GHz.
http://talk.maemo.org/showpost.php?p...&postcount=509
the main problem is that the max freq cannot be set as a boot parameter
unlike in previous kernel versions http://lwn.net/Articles/11548/
I'm at 21hrs up-time @ 900mhz and loving it. Even battery performance has not dropped. (I guess that's because it's mostly idling at 125Mhz and only scales up when required.)
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2010-04-04
, 13:25
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Posts: 946 |
Thanked: 1,650 times |
Joined on Oct 2009
@ Germany
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#105
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EDIT: please do not install it yet. I found a possible issue.
I have uploaded a new version that is supposed to support 125,250,500,550,600,700,750,800,850,900,1000MHz and sets the default max to 600MHz.
for freq >= 850 the DSP is set to 500MHz.
You should be able to change the frequency range as root using
I currently don't have my USB cable (for reflashing) with me so I can't test it myself 
If there are any volunteers please let me know whether it works.
Installing this new kernel is at your own risk, of course.
Be prepared to reflash the stock kernel per USB!
You can download version 19 from
http://maemory.com/N900/overclock/
install all packages and the kernel-flasher-maemo last.
Good luck!
Last edited by titan; 2010-04-05 at 09:23. Reason: update is RED
I have uploaded a new version that is supposed to support 125,250,500,550,600,700,750,800,850,900,1000MHz and sets the default max to 600MHz.
for freq >= 850 the DSP is set to 500MHz.
You should be able to change the frequency range as root using
Code:
echo 600000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq echo 250000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
If there are any volunteers please let me know whether it works.
Installing this new kernel is at your own risk, of course.
Be prepared to reflash the stock kernel per USB!
You can download version 19 from
http://maemory.com/N900/overclock/
install all packages and the kernel-flasher-maemo last.
Good luck!
Last edited by titan; 2010-04-05 at 09:23. Reason: update is RED
| The Following User Says Thank You to titan For This Useful Post: | ||
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2010-04-04
, 13:52
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Posts: 151 |
Thanked: 82 times |
Joined on Sep 2008
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#106
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Originally Posted by titan
Is there a way to make it persistent so it survives reboots?
I have uploaded a new version that is supposed to support 125,250,500,550,600,700,750,800,850,900,1000MHz and sets the default max to 600MHz.
for freq >= 850 the DSP is set to 500MHz.
You should be able to change the frequency range as root using
I currently don't have my USB cable (for reflashing) with me so I can't test it myselfCode:echo 600000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq echo 250000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
If there are any volunteers please let me know whether it works.
Installing this new kernel is at your own risk, of course.
Be prepared to reflash the stock kernel per USB!
You can download version 19 from
http://maemory.com/N900/overclock/
install all packages and the kernel-flasher-maemo last.
Good luck!
Also, compared to what I have on my phone, scaling_max_freq is currently reporting 600,000 although it's overclocked to 900Mhz (cpuinfo_max_freq)
Last edited by fixfox; 2010-04-04 at 13:56.
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2010-04-04
, 14:10
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Posts: 946 |
Thanked: 1,650 times |
Joined on Oct 2009
@ Germany
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#107
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which kernel are you using?
you could add the two commands to /etc/init.d/rcS
cpuinfo_max_freq is the maximum of the CPU, scaling_max_freq is what you set as limit
you could add the two commands to /etc/init.d/rcS
cpuinfo_max_freq is the maximum of the CPU, scaling_max_freq is what you set as limit
Originally Posted by fixfox
Is there a way to make it persistent so it survives reboots?
Also, compared to what I have on my phone, scaling_max_freq is currently reporting 600,000 although it's overclocked to 900Mhz (cpuinfo_max_freq)
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2010-04-04
, 14:13
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Posts: 2,473 |
Thanked: 12,265 times |
Joined on Oct 2009
@ Jerusalem, PS/IL
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#108
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Originally Posted by fixfox
I noticed that too, trycat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
Is there a way to make it persistent so it survives reboots?
Also, compared to what I have on my phone, scaling_max_freq is currently reporting 600,000 although it's overclocked to 900Mhz (cpuinfo_max_freq)
Mine shows:
800000 550000 500000 250000 125000
cpuinfo_max_freq also shows 600000 here
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2010-04-04
, 14:16
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Posts: 664 |
Thanked: 160 times |
Joined on Jul 2008
@ Australia
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#109
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cat scaling_available_frequencies prints as:
400000 360000 180000 180000 900000
isn't it all messed up or is it alright? thanks.
EDIT: its after the installation and reboot. I haven't gave a single command. and I was using 900MHz prior to this.
Last edited by jaeezzy; 2010-04-04 at 14:20.
400000 360000 180000 180000 900000
isn't it all messed up or is it alright? thanks.
EDIT: its after the installation and reboot. I haven't gave a single command. and I was using 900MHz prior to this.
Last edited by jaeezzy; 2010-04-04 at 14:20.
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2010-04-04
, 14:33
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Posts: 151 |
Thanked: 82 times |
Joined on Sep 2008
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#110
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Mine (scaling_available_freqs) shows...
900000, 550000, 500000,250000, 125000
900000, 550000, 500000,250000, 125000
http://maemo.org/packages/package_in....6.28-maemo18/
Last edited by titan; 2010-04-01 at 06:35. Reason: testing link