Those of you who followed this thread http://xdaforums.com/showthread.php?t=1141550, and went all the way backwards to RFS from ext4, you probably made a mistake. ext4 is objectively a better file system, it just may be configured to run somehow slower, although more secure. This security is needed when the drive can be disconnected on the fly or may suddenly lose power, which is obviously not applicable to our phones as the card is inside and nobody normally removes it with the phone on.
Anyway, I looked how Voodoo mounts the ext4 partitions and found couple of things that can be improved. First of all, "noatime" option should be set to all partition wherever possible. This option tells not to ever update last access time upon every read operation. It is actually being set like this with one of the init.d tweaks already. The other option has way bigger effect. It controls delayed allocations, the allocation mechanism that is one of the biggest improvement of ext4 over ext3. For some reason Voodoo sets it to "nodelalloc" for \data partition. As soon as I changed it to "delalloc", my Quadrant score shot from about 1700 to over 2300.
Here is how to fix it, IF YOU ARE STILL ON EXT4 FOR ALL 3 PARTITIONS. If you moved back to RFS this will have no effect.
If you don't use init.d, then you have to start using it
You'll have to either modify one of the existing init.d scripts, or write you own like this:
--
#!system/bin/sh
for k in $(busybox mount | grep -E 'relatime|nodelalloc' | cut -d " " -f3) ; do
sync
busybox mount -o remount,noatime,delalloc $k
done
--
Those who already use init.d tweaks should modify the S98edt_tweaks file. Open it with an editor and change the "for" loop in the beginning (the one that deals with remounting partitions) to my code. Save, reboot, and try Quadrant now.
I also recommend removing the "fix" that extends SD read-ahead cache. Comment out the related code, you can easily find it in this file. This cache can bring more troubles than benefits, but well, it's up to you.
Btw you may as well remove code in 20sombionixInit file that deals with the same "noatime", the part that does "for k in $PART;..., done;", it's just redundant.
Anyway, I looked how Voodoo mounts the ext4 partitions and found couple of things that can be improved. First of all, "noatime" option should be set to all partition wherever possible. This option tells not to ever update last access time upon every read operation. It is actually being set like this with one of the init.d tweaks already. The other option has way bigger effect. It controls delayed allocations, the allocation mechanism that is one of the biggest improvement of ext4 over ext3. For some reason Voodoo sets it to "nodelalloc" for \data partition. As soon as I changed it to "delalloc", my Quadrant score shot from about 1700 to over 2300.
Here is how to fix it, IF YOU ARE STILL ON EXT4 FOR ALL 3 PARTITIONS. If you moved back to RFS this will have no effect.
If you don't use init.d, then you have to start using it
You'll have to either modify one of the existing init.d scripts, or write you own like this:--
#!system/bin/sh
for k in $(busybox mount | grep -E 'relatime|nodelalloc' | cut -d " " -f3) ; do
sync
busybox mount -o remount,noatime,delalloc $k
done
--
Those who already use init.d tweaks should modify the S98edt_tweaks file. Open it with an editor and change the "for" loop in the beginning (the one that deals with remounting partitions) to my code. Save, reboot, and try Quadrant now.
I also recommend removing the "fix" that extends SD read-ahead cache. Comment out the related code, you can easily find it in this file. This cache can bring more troubles than benefits, but well, it's up to you.
Btw you may as well remove code in 20sombionixInit file that deals with the same "noatime", the part that does "for k in $PART;..., done;", it's just redundant.
