Thread: Massive interactivity improvement under high I/O load!
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bobh is offline bobh
2011-02-17 , 22:07
Posts: 62 | Thanked: 62 times | Joined on Jul 2010 @ New Hampshire, US
#47
Originally Posted by nightfire View Post
The thing is, I suspect the I/O buffer on most MicroSD cards is big enough that we don't routinely hit the situation of distributed writes causing excessive erases, because for me the streaming performance wasn't affected at all.
I think an efficient algorithm would erase blocks in the background so they are ready when needed. That way only when the pool was exhausted would a write be held up by an erase. I think JFFS2 does something like that, but have no clue whether SD cards are that smart.

At any rate, your changes do seem to help interactivity without causing the performance loss when writing large files over USB or SSH that I have seen with some of the other proposed settings that have been floating around.