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-   -   Massive interactivity improvement under high I/O load! (https://talk.maemo.org/showthread.php?t=69973)

qole 2011-04-25 16:39

Re: Massive interactivity improvement under high I/O load!
 
So the swapoff/swapon works to speed up decompression, but only when Swappolube is enabled. I still need to find the magic setting(s).

epitaph 2011-04-25 16:50

Re: Massive interactivity improvement under high I/O load!
 
Quote:

Originally Posted by qole (Post 995106)
So the swapoff/swapon works to speed up decompression, but only when Swappolube is enabled. I still need to find the magic setting(s).

I'm not using the recommend value of 30 from Swappolube. It didn't worked for me. I'm using something > 45 and I can confirm that swapoff/swappon works wonders and also a low nr_requests but not so low as OP suggested.

qole 2011-04-25 17:21

Re: Massive interactivity improvement under high I/O load!
 
I disabled Swappolube, and tried just swapoff/swapon. Decompression took TWO HOURS.

I rebooted, did mmblk0 and mmblk1 nr_requests = 512, and swapoff/swapon, and the same decompression took only 9 minutes.

So that seems to be the magic.

gabby131 2011-04-25 18:32

Re: Massive interactivity improvement under high I/O load!
 
Quote:

Originally Posted by epitaph (Post 995110)
I'm not using the recommend value of 30 from Swappolube. It didn't worked for me. I'm using something > 45 and I can confirm that swapoff/swappon works wonders and also a low nr_requests but not so low as OP suggested.

i saw a thread re: I/O nr_request and according to that, the lower the value might be better.....please correct me....... :)

thanks.

EDIT: i hope this thread be merged here....

stlpaul 2011-04-25 21:46

Re: Massive interactivity improvement under high I/O load!
 
Also FWIW there are threads on Android forums about this exact same topic, tweaking the settings for better I/O performance. One I read recently suggested setting nr_requests to 1024 (along with a slew of other settings, like we're doing here).

humble 2011-04-25 21:54

Re: Massive interactivity improvement under high I/O load!
 
it kinda late but i forgot to add that i have Swappolube installed. i only tweaked
Code:

min.Free kbytes from 2039 default to 512

gabby131 2011-04-26 04:26

Re: Massive interactivity improvement under high I/O load!
 
i kinda not getting the hang on the wiki, is there a noob way on setting the priority of swaps equal? :o

thanks........google-ing

EDIT: found one!!! google and the search bar rules!!!

gabby131 2011-04-26 05:46

Re: Massive interactivity improvement under high I/O load!
 
i cant set the swap priorities to equal.....>_<

i need light!!! :D

stlpaul 2011-04-26 05:52

Re: Massive interactivity improvement under high I/O load!
 
Quote:

Originally Posted by gabby131 (Post 995403)
i cant set the swap priorities to equal.....>_<

i need light!!! :D

Default swapon program doesn't allow setting priority. You need to use a different swapon (for example the one from easy debian works from outside of the chroot). Though I have better performance just using SD for swap and disabling the eMMC swap entirely.

sr00t 2011-04-28 17:44

Re: Massive interactivity improvement under high I/O load!
 
qole, I just tought you wanna listen some positive review here. I don't have any problems at all with easy debian, and I use extensively almost all day(s).
Installed it in MicroSD Class6, sharing with NITDroid. No problems at all.
Using last power user kernel and SSU, only kernel setting changed is swappiness, to 30. No OC at all, stock @ 600mhz.


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