Overclock the N900? - Page 269 - maemo.org

AlMehdi | # 2681 | 2010-04-14, 04:49 | Report

Do someone know the volt settings for the 250-810-xlv-kernel?

edit: ohh.. found this:
XLV is: "30 20 30 33 38 38 45 45 48 48 54 54 60 67 72"
ideal: 30 30 30 30 33 38 45 45 48 48 54 54 60 67 72 (first three ignored)
ULV: 25 25 25 33 38 38 45 45 48 48 54 54 60 67 72
LV: 30 30 38 48 48 54 54 54 54 54 54 54 60 67 72

It looks like the 250-xxx-xlv-kernel volt settings..

edit2: But now.. what are the dsp setting :|

Last edited by AlMehdi; 2010-04-14 at 04:54.

egoshin | # 2682 | 2010-04-14, 05:01 | Report

Originally Posted by psrkn View Post

Can someone with the stock version installed or unmodified N900, do "uname -a" command on xterm for me please? My device shows an unknow device's processor. I would like to confirm whether it is ok or not.

My is shown as:
Linux Nokia-N900-42-11 2.6.28.10maemo-omap1 #1 PREEMPT Tue Apr 13 10:48:47 EEST 2010 armv7l unknown

Thanks

I have "armv71 unknown" on my stock kernel.

The Following User Says Thank You to egoshin For This Useful Post:
S0urcerr0r

debernardis | # 2683 | 2010-04-14, 05:16 | Report

I am running the maemo22 kernel with dsp default voltage, xlv stock voltage for cpu, having reduced the voltage for 900 MHz from 54 to 48. My range is 125-900. So far, so good.

Ah, and for safety, I have extracted the /etc/event.d/kernel-maemo tweaks in a script which I can manually launch after booting

bigswed | # 2684 | 2010-04-14, 05:34 | Report

How can i made this tweak permanet?
Every time i turn off and on the phone it returns to defualt setings.

I have to do pot back this tweaks every time i start upp the phone.

/thanks

/sys/power/sr_vdd2_autocomp
0 ... my hint: 1
/sys/power/sr_vdd1_autocomp
0 ... my hint: 1
/proc/sys/vm/swappiness
100 ... my hint: decrease
/proc/sys/vm/page-cluster
5 ... my hint: keep
/proc/sys/vm/laptop_mode
0 ... my hint: keep
/proc/sys/vm/dirty_expire_centisecs
500 ... my hint: increase
/proc/sys/vm/dirty_writeback_centisecs
500 ... my hint: increase
/proc/sys/vm/dirty_background_ratio
10 ... my hint: increase
/proc/sys/vm/dirty_ratio
40 ... my hint: increase
/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
250000 ... my hint: keep
/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
600000 ... my hint: keep
/sys/devices/system/cpu/cpu0/cpufreq/ondemand/powersave_bias
0 ... my hint: keep
/sys/devices/system/cpu/cpu0/cpufreq/ondemand/sampling_rate
300000 ... my hint: increase
/sys/devices/system/cpu/cpu0/cpufreq/ondemand/up_threshold
95 ... my hint: decrease
/sys/devices/system/cpu/cpu0/cpufreq/ondemand/ignore_nice_load
0 ... my hint: 1
/sys/block/mmcblk0/queue/scheduler
noop [cfq] ... my hint: keep
/sys/block/mmcblk1/queue/scheduler
noop [cfq] ... my hint: keep

Gusse | # 2685 | 2010-04-14, 06:22 | Report

Originally Posted by titan View Post

my new script /etc/event.d/kernel-maemo

Code:

stop on starting shutdown
service
console none
script
	test -f /etc/lastboot && TDIFF=$(expr $(date +%s) - $(stat -t /etc/lastboot |awk '{print $14}'))
	if test -z "$TDIFF" || test "$TDIFF" -gt 300; then
		touch /etc/lastboot
		modprobe bq27x00_battery
		test -f /etc/default/kernel || exit 0
		source /etc/default/kernel
		test -n "$UP_THRESHOLD" && echo $UP_THRESHOLD > /sys/devices/system/cpu/cpu0/cpufreq/ondemand/up_threshold
		test -n "$SAMPLING_RATE" && echo $SAMPLING_RATE > /sys/devices/system/cpu/cpu0/cpufreq/ondemand/sampling_rate
        	test -n "$MIN_FREQ" && echo $MIN_FREQ > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
		test -n "$MAX_FREQ" && echo $MAX_FREQ > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
		test -n "$VDD1_OPPS_VSEL" && echo $VDD1_OPPS_VSEL > /sys/power/vdd1_opps_vsel
		test -n "$DSP_OPPS_RATE" && echo $DSP_OPPS_RATE > /sys/power/dsp_opps_rate
		test -n "$SMARTREFLEX_VDD1" && echo $SMARTREFLEX_VDD1 > /sys/power/sr_vdd1_autocomp
		test -n "$SMARTREFLEX_VDD2" && echo $SMARTREFLEX_VDD2 > /sys/power/sr_vdd2_autocomp
		exit 0
	else
		exit 1
	fi
end script

with /etc/default/kernel

Code:

UP_THRESHOLD=75
SAMPLING_RATE=150000
VDD1_OPPS_VSEL="30 30 30 30 33 38 45 45 48 48 54 54 60 72 72"
DSP_OPPS_RATE="90000000 90000000 180000000 360000000 400000000 430000000 430000000 430000000 430000000 500000000 500000000 500000000 500000000 520000000 520000000"
MIN_FREQ=500000
MAX_FREQ=850000
SMARTREFLEX_VDD1=0
SMARTREFLEX_VDD2=0

I cannot set VDD1_OPPS_VSEL with this script. I have following settings in /etc/default/kernel.

Code:

VDD1_OPPS_VSEL="30 20 25 30 33 38 45 45 48 48 54 54 60 67 72"

When I check voltage settings after boot, I get default values.

Code:

cat /sys/power/vdd1_opps_vsel

I have to enter command from x-term with root rights and then it will change settings.

Code:

echo "30 20 25 30 33 38 45 45 48 48 54 54 60 67 72" > /sys/power/vdd1_opps_vsel

Have I missed something and therefore script is not working for me?
---------------------------------
Battery drop during last night was less than 5%, which is a BIG improvement. Thank you very much!

Last edited by Gusse; 2010-04-14 at 06:27.

titan | # 2686 | 2010-04-14, 06:56 | Report

Originally Posted by titan View Post

so far the results with "ideal" settings look great (disconnected from charger at 17:00,
mostly idling with Wifi)

it dropped from 97% to 95% within 5 hours.

update: after some more intensive usage last night it dropped from 95%->90%.
then during sleep (idle) till now 0-9 only by about 2%.

If I extrapolate the 14h=4% then in theory I would get 339h=14days of idle power. nice!

titan | # 2687 | 2010-04-14, 07:02 | Report

the next update scheduled for tonight should have the upstart script, the defaults in /etc/default/kernel-maemo and a script /usr/sbin/update-kernel to set individual or the default settings.
for example,

Code:

sudo /usr/sbin/update-kernel show

would show the current settings

Code:

sudo /usr/sbin/update-kernel

would set the ones in /etc/default/kernel-maemo

Code:

sudo /usr/sbin/update-kernel set -l 500

would set the minimum to 500Mhz.

Dr.Marcial | # 2688 | 2010-04-14, 07:07 | Report

Originally Posted by titan View Post

my new script /etc/event.d/kernel-maemo

Code:

stop on starting shutdown
service
console none
script
	test -f /etc/lastboot && TDIFF=$(expr $(date +%s) - $(stat -t /etc/lastboot |awk '{print $14}'))
	if test -z "$TDIFF" || test "$TDIFF" -gt 300; then
		touch /etc/lastboot
		modprobe bq27x00_battery
		test -f /etc/default/kernel || exit 0
		source /etc/default/kernel
		test -n "$UP_THRESHOLD" && echo $UP_THRESHOLD > /sys/devices/system/cpu/cpu0/cpufreq/ondemand/up_threshold
		test -n "$SAMPLING_RATE" && echo $SAMPLING_RATE > /sys/devices/system/cpu/cpu0/cpufreq/ondemand/sampling_rate
        	test -n "$MIN_FREQ" && echo $MIN_FREQ > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
		test -n "$MAX_FREQ" && echo $MAX_FREQ > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
		test -n "$VDD1_OPPS_VSEL" && echo $VDD1_OPPS_VSEL > /sys/power/vdd1_opps_vsel
		test -n "$DSP_OPPS_RATE" && echo $DSP_OPPS_RATE > /sys/power/dsp_opps_rate
		test -n "$SMARTREFLEX_VDD1" && echo $SMARTREFLEX_VDD1 > /sys/power/sr_vdd1_autocomp
		test -n "$SMARTREFLEX_VDD2" && echo $SMARTREFLEX_VDD2 > /sys/power/sr_vdd2_autocomp
		exit 0
	else
		exit 1
	fi
end script

with /etc/default/kernel

Code:

UP_THRESHOLD=75
SAMPLING_RATE=150000
VDD1_OPPS_VSEL="30 30 30 30 33 38 45 45 48 48 54 54 60 72 72"
DSP_OPPS_RATE="90000000 90000000 180000000 360000000 400000000 430000000 430000000 430000000 430000000 500000000 500000000 500000000 500000000 520000000 520000000"
MIN_FREQ=500000
MAX_FREQ=850000
SMARTREFLEX_VDD1=0
SMARTREFLEX_VDD2=0

titan

Do I copy this to a .txt file and put them in the folders you indicated? or do I need to rename extension to .ini?

Do I also need to make a seperate one for the "ideal script"?

thank you soo much for your dedication into this!

Edit: I just saw your last post, does this mean we dont need to make the scripts ourselfs? still how do I include the ideal patch one.

Bitte!

stetam | # 2689 | 2010-04-14, 07:09 | Report

Originally Posted by sachin007 View Post

Yes i am seeing a problem with micro B
Sometimes it just shows a white page without anything else. The progress bar does its thing and everything is normal but the page is just blank. Happened 10 - 12 times after over clocking. Tried to close the browser and restart it but same result. However after a no. of tries it came back to normal.
I am on 900 mhz

I have this problem with no overclock

debernardis | # 2690 | 2010-04-14, 07:09 | Report

@Titan: I am sistematically reducing voltage for most frequency. So far, "30 20 30 30 35 35 42 42 42 48 48 54 60 67 72", my cpu follows me. Min-max are 500-900.

What am I risking from such tuning-undervolting? What are the main signs of too much volt starving, apart from obvious crashes?

EDIT: I'm at "30 20 28 28 35 35 42 42 42 48 48 51 54 67 72" with 500-1000 MHz

Last edited by debernardis; 2010-04-14 at 12:35.