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J0ph33	2009-12-10 , 23:58
Posts: 57 \| Thanked: 2 times \| Joined on Apr 2008 @ Germany	#1

hiho

is there a program to check N900's cpu clock

a benchmark would help as well...

thanks in advance

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kwotski	2009-12-11 , 00:11
Posts: 236 \| Thanked: 223 times \| Joined on Oct 2009 @ NE UK	#2

for a very basic check, you can do (in xtermnal)

cat /proc/cpuinfo

Edit: Wrong! See below..

Last edited by kwotski; 2009-12-11 at 00:48.

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	msa	2009-12-11 , 00:20
	Posts: 909 \| Thanked: 216 times \| Joined on Nov 2009 @ Bremen, Germany	#3

check wikipedia: 600 mhz

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kwotski	2009-12-11 , 00:47
Posts: 236 \| Thanked: 223 times \| Joined on Oct 2009 @ NE UK	#4

Oops, I should have said:

Code:

cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq

There's other stuff in the same directory:

Code:

# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
600000 550000 500000 250000

~# cat /sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state
600000 50910
550000 1552
500000 18403
250000 838257

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J0ph33	2009-12-11 , 01:08
Posts: 57 \| Thanked: 2 times \| Joined on Apr 2008 @ Germany	#5

thx kwotski

but for now its not possible to check the actual cpu clock?

maybe someone could write an app based on the commands u mentioned...

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	GeneralAntilles	2009-12-11 , 01:11
	Posts: 5,478 \| Thanked: 5,222 times \| Joined on Jan 2006 @ St. Petersburg, FL	#6

Originally Posted by J0ph33

but for now its not possible to check the actual cpu clock?

It'll vary by as much as 400MHz several times a second. Why do you care?

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fusi	2009-12-11 , 02:28
Posts: 92 \| Thanked: 69 times \| Joined on Nov 2009 @ UK	#7

i guess a rolling average is what is being asked for?

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kwotski	2009-12-11 , 02:56
Posts: 236 \| Thanked: 223 times \| Joined on Oct 2009 @ NE UK	#8

Yeah, I think you really want a benchmark, probably

You won't get much closer to the "actual" clock than reading stuff out of /proc, since (though it looks like a file) the data I mentioned in there is in fact directly accessing data placed in RAM by the kernel routines that are the best informed of anyone about what state the clock is at least supposed to be in.

For a quick "rolling average 'app'" you could try running:

Code:

watch -n 1 "perl -ne 'if(/(\d+)\s+(\d+)/){\$c += \$1 * \$2; \$t += \$2; }END{ \$a = \$c / \$t; print \"\$c cycles in \$t secs, avg: \$a\n\";}' /sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state"

in x-term

At this time of night, I'm not guaranteeing the arithmetic..