maemo.org - Talk - View Single Post - Why there is lack of interest "Highspeed enabled kernel for the Nokia n800 and n810"?

	Munk	2008-07-14 , 05:18
	Posts: 229 \| Thanked: 108 times \| Joined on Oct 2007 @ Sacramento, California	#12

Bunanson, after using a script to toggle the CPU speed of the device and jump in 48Mhz mode here are my results. Actually, before and then after:

Before: (mmcblk1p1 = Internal 2G mem), (mmcblk1p2 = external SD)

/dev/mmcblk1p1:
Timing cached reads: 180 MB in 2.02 seconds = 89.13 MB/sec
Timing buffered disk reads: 12 MB in 3.17 seconds = 3.79 MB/sec

/dev/mmcblk1p2:
Timing cached reads: 188 MB in 2.01 seconds = 93.51 MB/sec
Timing buffered disk reads: 16 MB in 3.10 seconds = 5.16 MB/sec

After:

/dev/mmcblk1p1:
Timing cached reads: 192 MB in 2.00 seconds = 95.84 MB/sec
Timing buffered disk reads: 28 MB in 3.66 seconds = 7.64 MB/sec

/dev/mmcblk1p2:
Timing cached reads: 196 MB in 2.00 seconds = 97.92 MB/sec
Timing buffered disk reads: 42 MB in 3.20 seconds = 13.11 MB/sec

So, you can see that I am getting about a 2.5x speed increase on the "buffered disk read" on my external SD card. On the internal 2 gigabyte memory I am getting about a 2x speed increase. I can tell you that just before I did install your .bin file, I was only seeing about a 1.3x speed increase after running my turbo script.

Oh, so here is the script that I am running to get the speed increase. I think Bunanson gave this to me before. Sorry if I got this wrong:

echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo 400000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq

For testing the speed I was using hdparm which you'll have to search on this forum to find where to download it from. Here's the command line information to type:

./hdparm -Tt /dev/mmcblk1p1
./hdparm -Tt /dev/mmcblk1p2

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