[ANNOUNCE] COMPCACHE on kernel-power (now with notifications) - Page 11 - maemo.org

412b | # 101 | 2011-08-31, 06:24 | Report

swapiness = 10
runs smooth enough except switching from task manager to app due to io load 50-75%, managed to open about 5 XTerms, 6 Browser tabs, Contacts, Messaging, FBReader, MediaBox, Modest, RSS, File Browser, Calendar with noticable lag in switching (due to high io load).
I've also got a bit tuned syspart (/usr/share/policy/etc/rx51/syspart.conf)
looking forward getting memory free fully working as it's a big stopper at the moment IMO.

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[DarkGUNMAN] | # 102 | 2011-08-31, 06:31 | Report

Ok, swapolube optimisations removed set to stock values.
Speedpatch removed.

Still lagging a bit once cache is full.
Since I'm not exactly knowledgable on this are there any more values I need to correct?

Code:

 $ cat /proc/swaps
Filename				Type		Size	Used	Priority
/dev/ramzswap0                          partition	120504	120492	-1
/dev/mmcblk0p3                          partition	786424	63204	-2
~ $ cat /proc/sys/vm/*
0
10
500
40
500
0
0
59326
30000	30001	30002	30003	0	0	0	0
45
32768
201135
-66
98304
-121
131072
1024
32
0
65536
2039
4096
2
0
0
0
50
2
0
0
20
100

freemangordon | # 103 | 2011-08-31, 06:50 | Report

Originally Posted by 412b View Post

swapiness = 10
runs smooth enough except switching from task manager to app due to io load 50-75%, managed to open about 5 XTerms, 6 Browser tabs, Contacts, Messaging, FBReader, MediaBox, Modest, RSS, File Browser, Calendar with noticable lag in switching (due to high io load).
I've also got a bit tuned syspart (/usr/share/policy/etc/rx51/syspart.conf)
looking forward getting memory free fully working as it's a big stopper at the moment IMO.

Will you try page-cluster values 0,1,2 to see if there is any difference?

Re memory free - it is working OK, trust me on that. My understanding is that what happens is the best possible scenario, i.e. instead of notification for a page that was just marked as unused it is immediately overwritten. While we have notifications for the pages that are not immediately overwritten.
For sure there are optimizations to be done, if you look at the code there is a mutex used on write operations.

And for the amount of applications you are testing with - try that on your laptop and tell me how it went

[DarkGUNMAN] | # 104 | 2011-08-31, 07:14 | Report

Responsiveness MUCH improved with page-cluster set to 0 and swappiness set to 10

TMavica | # 105 | 2011-08-31, 08:24 | Report

Originally Posted by freemangordon View Post

@TMavica - and do you thing there is an improvement on responsiveness, or things are just the same?

Yes, I feel the responsiveness is improved, but not a lot

gregoranderson | # 106 | 2011-08-31, 08:37 | Report

Intrigued as to how phone-ui is with this added. I'm in the middle of a prepping a reflash to end all reflashes of my phone. Off topic, but so far, the best "feel" gains have been eMMC fully ext3 and swap only on SD card (things like Fapman zip along and I can fuddle with the phone doing other stuff while it's doing it's thing) but the phone-ui still remains a stuttering mess.

Either way, will give this a shot later after work, unless someone has beaten me too it.

Cheers @freemangordon et al, for your continued efforts towards this community and unique piece of hardware

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freemangordon | # 107 | 2011-08-31, 08:54 | Report

@gregoranderson - I would recommend to wait before trying it a little bit, today I will try to make optimizations to the way swap read/write/free requests are handled, at this point compcache does not bring much improvement, while could lead to laggy system from time to time. The "testing" so far was to prove that it is working at all, without oops and hangs.

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vi_ | # 108 | 2011-08-31, 20:42 | Report

Originally Posted by gregoranderson View Post

Intrigued as to how phone-ui is with this added. I'm in the middle of a prepping a reflash to end all reflashes of my phone. Off topic, but so far, the best "feel" gains have been eMMC fully ext3 and swap only on SD card (things like Fapman zip along and I can fuddle with the phone doing other stuff while it's doing it's thing) but the phone-ui still remains a stuttering mess.

Either way, will give this a shot later after work, unless someone has beaten me too it.

Cheers @freemangordon et al, for your continued efforts towards this community and unique piece of hardware

Hey, start a new thread on 'the flash to end all re-flashes', this could lead to some interesting discussion!

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freemangordon | # 109 | 2011-09-01, 06:20 | Report

OK guys, my conclusions so far:

1 - compcache works

2 - Anything above (lets's say) 64-96 MBs for disksize_kb results in a massive swap trashing at some point in time. Yesterday it was the first time for maybe an year I missed a call because the UI was stuck (because of the swap trashing)
3 - using the above size should not harm , only can improve things, but no wonders. I setup my primary phone that way, so will see how it will progress with time.
4- The only viable option so far to get rid of the UI lag is to move swap on SD card. Even if it is class 2 you forget about lagging.

I don't think I can do much more on that, sorry.

Last edited by freemangordon; 2011-09-01 at 07:47. Reason: swap size range

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TMavica | # 110 | 2011-09-01, 06:39 | Report

I havent swap on sd card, let me trytry