Thread: Massive interactivity improvement under high I/O load!
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epitaph is offline epitaph
2011-03-02 , 03:36
Banned | Posts: 358 | Thanked: 160 times | Joined on Dec 2010
#74
Originally Posted by nightfire View Post
Hey MT,

Mine's been rock solid with the config listed here. :/ I multitask heavily all the time and reboot about once a week for some reason or another.

I will admit that I stopped striping my swap as my tests from the other thread were somewhat bogus. In real-world scenarios I found swapping to the internal storage + SD was slower as:

a) it ties up the internal storage and
b) SD card is much faster for reads and writes.

I'm now swapping exclusively to SD (9mb/sec write, 17mb/sec read) and everything's stable and snappy.
I don't know about a) but this isn't true for me when I stripe swap like u have suggested in ur 1st post:

/dev/mmcblk0p3 partition 786424 0 -2
/dev/mmcblk1p1 partition 639988 88092 -1

and SD card has prio -1 and is filled with 88 MB and internal has prio -2 and filled with 0 Bytes my device feels much more responsive. My 8 GB class 6 card is most likely similar in read and write to ur card. Also I'm using readahead of only 16 and nr_request of 1-4. One explanation can be that the bigger stripped swap space affects somehow the calculation of the swap function. The other is that I randomly and accidently choose a size of the 2nd swap and the 1st space together that match the 128 kb page limit but I'm really unsure. Is ur internal swap then disabled und useless waste? Anyway I got an error in my sfdisk program when it should count from 1 to INFINITY like told in the wiki about partitioning the sd card my program count from 0.
Last edited by epitaph; 2011-03-02 at 09:32.