[ANNOUNCE] COMPCACHE on kernel-power (now with notifications) - Page 9 - maemo.org

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	Gusse	2011-08-30 , 11:18
	Posts: 168 \| Thanked: 206 times \| Joined on Apr 2010 @ Finland	#81

I did comparison between KPv48 and KPv48_Compcache and it seems that RAM and swap usages are both higher with compcache.

What I did: openend microb and did some surfing and monitored Conky. Then left only Conky running and checked RAM and swap after some 5min of idle.

KPv48
RAM: ~170MB
Swap: 90MB

KPv48_Compcache (disksize 98304)
RAM: ~200MB
Swap: 120MB

Wonder why RAM and swap usage is so much higher? I tried to do excatly same things in both cases.

Last edited by Gusse; 2011-08-30 at 11:21.

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vi_	2011-08-30 , 11:26
Posts: 1,680 \| Thanked: 3,685 times \| Joined on Jan 2011	#82

Originally Posted by Gusse

I did comparison between KPv48 and KPv48_Compcache and it seems that RAM and swap usages are both higher with compcache.

What I did: openend microb and did some surfing and monitored Conky. Then left only Conky running and checked RAM and swap after some 5min of idle.

KPv48
RAM: ~170MB
Swap: 90MB

KPv48_Compcache (disksize 98304)
RAM: ~200MB
Swap: 120MB

Wonder why RAM and swap usage is so much higher? I tried to do excatly same things in both cases.

Swap use is higher...Because you now have less RAM...

I imagine the 'swap settings for high I/O' or whatever that thread was called has more appropriate swap settings than say swappolube defaults.

Reasoning is swappolube optimises for minimal swapping (hence low swappiness) and the 'high I/O' settings optimise for lots of little swaps.

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freemangordon	2011-08-30 , 12:04
Posts: 3,074 \| Thanked: 12,964 times \| Joined on Mar 2010 @ Sofia,Bulgaria	#83

Originally Posted by vi_

Swap use is higher...Because you now have less RAM...

I imagine the 'swap settings for high I/O' or whatever that thread was called has more appropriate swap settings than say swappolube defaults.

Reasoning is swappolube optimises for minimal swapping (hence low swappiness) and the 'high I/O' settings optimise for lots of little swaps.

Exactly, bellow are my settings

Code:

        echo 30 > /proc/sys/vm/swappiness
        echo 0 > /proc/sys/vm/page-cluster
        echo 512 > /sys/block/mmcblk0/queue/nr_requests
        echo 512 > /sys/block/mmcblk1/queue/nr_requests


        echo 0 > /sys/block/mmcblk0/queue/iosched/slice_idle
        echo 0 > /sys/block/mmcblk1/queue/iosched/slice_idle
        echo 32 > /sys/block/mmcblk0/queue/iosched/quantum
        echo 32 > /sys/block/mmcblk1/queue/iosched/quantum
        echo 80 > /sys/block/mmcblk0/queue/iosched/fifo_expire_sync
        echo 80 > /sys/block/mmcblk1/queue/iosched/fifo_expire_sync
        echo 180 > /sys/block/mmcblk0/queue/iosched/fifo_expire_async
        echo 180 > /sys/block/mmcblk1/queue/iosched/fifo_expire_async

... and swap on microsd

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	Gusse	2011-08-30 , 13:27
	Posts: 168 \| Thanked: 206 times \| Joined on Apr 2010 @ Finland	#84

Originally Posted by vi_

Swap use is higher...Because you now have less RAM...

Of cource, what was I thinking

If we run out of RAM, could this cause lack of responsiveness due to heavy swapping activity? Just trying to understand what is causing quite big loading conditions in my system when using Compcache.

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	F2thaK	2011-08-30 , 13:43
	Posts: 4,365 \| Thanked: 2,467 times \| Joined on Jan 2010 @ Australia Mate	#85

I did the following as root in xterm and got errors

Code:

insmod /lib/modules/current/ramzswap.ko disksize_kb=120512
swapon /dev/ramzswap0
swapoff /dev/mmcblk0p3; swapon /dev/mmcblk0p3

insmod /lib/modules/current/ramzswap.ko disksize_kb=120512 = -1 invalid module format
swapon /dev/ramzswap0 = no such file/dir

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freemangordon	2011-08-30 , 14:09
Posts: 3,074 \| Thanked: 12,964 times \| Joined on Mar 2010 @ Sofia,Bulgaria	#86

Originally Posted by F2thaK

I did the following as root in xterm and got errors
Code:
insmod /lib/modules/current/ramzswap.ko disksize_kb=120512
swapon /dev/ramzswap0
swapoff /dev/mmcblk0p3; swapon /dev/mmcblk0p3
insmod /lib/modules/current/ramzswap.ko disksize_kb=120512 = -1 invalid module format
swapon /dev/ramzswap0 = no such file/dir

use the kernel from the first post, ok?

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	TMavica	2011-08-30 , 16:20
	Posts: 2,021 \| Thanked: 1,060 times \| Joined on Apr 2010 @ Hong Kong	#87

when swap full, phone become laggy

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freemangordon	2011-08-30 , 16:31
Posts: 3,074 \| Thanked: 12,964 times \| Joined on Mar 2010 @ Sofia,Bulgaria	#88

what disksize_kb are you using. Also do you use some speedpatches?

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	TMavica	2011-08-30 , 16:35
	Posts: 2,021 \| Thanked: 1,060 times \| Joined on Apr 2010 @ Hong Kong	#89

Originally Posted by freemangordon

what disksize_kb are you using. Also do you use some speedpatches?

use yours recommend size 120512, speedpatch? I removed

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freemangordon	2011-08-30 , 16:49
Posts: 3,074 \| Thanked: 12,964 times \| Joined on Mar 2010 @ Sofia,Bulgaria	#90

And you are sure speedpatch uninstalls correctly? No remnants? Anyway we are still trying to discover what are the best settings to be used with compcache.
For now you may try (in xterm as root)

echo 20 > /proc/sys/vm/swappiness
echo 2 > /proc/sys/vm/page-cluster

hoping that other vm settings are stock. if that not help then I can bet you have some remnants from some optimization script that have messed your /proc/sys/vm/ (and who knows what else) values. In case lagging continues would you please do cat /proc/sys/vm/* and copy the result here