[haiku-development] Re: Latest changes and general status.
- From: "Axel Dörfler" <axeld@xxxxxxxxxxxxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Thu, 24 Apr 2008 10:08:59 +0200 CEST
Bruno Albuquerque <bga@xxxxxxxxxxxxx> wrote:
> I wonder if we are not doing excessive locking in OpenBFS...
Not more than needed - its design requires to have all meta write
operations sequentially, all other locking is done per inode.
I would rather expect the problem for this to be in the I/O path as a
whole - it is not yet optimized at all. For example, the file/block
cache only reads exactly whatever you tell it (no precaching), there is
no I/O scheduler, our VM always only maps in 4K on a page fault, etc.
BTW the interface speed does not really determine the speed of a hard
drive. If you have a 4ms access, 10000 rpm drive, then you have a fast
drive. If you have a 8ms access, 7200 rpm drive, you have a standard
drive.
Bye,
Axel.
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