[haiku-development] Re: More fun with numbers [was: Networking speed update]
- From: "Axel Dörfler" <axeld@xxxxxxxxxxxxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Wed, 30 Jul 2008 09:14:29 +0200 CEST
Stephan Assmus <superstippi@xxxxxx> wrote:
> Axel Dörfler wrote:
> > Stephan Assmus <superstippi@xxxxxx> wrote:
> > > It will be most interesting to repeat these tests when the new I/
> > > O
> > > scheduler is effective! :-D
> > I doubt this will gain a lot of speed, actually, at least not at
> > first.
> > The I/O scheduler alone will only bring improvements when more than
> > one
> > thread is using the hard drive (which is not the case for SVN). It
> > will
> > just create a framework that allows us to do other optimizations
> > that
> > might bring more speed :-)
> Doesn't the I/O scheduler also reorder requests to minimize seek
> times? I
> realize this would require to impose an initial latency in order for
> more
> requests to pour in from SVN. Hm. This cannot work, right? Because
> SVN
> would wait for the requests to be fulfilled before issuing the next?
> So
> read-ahead is the only thing that would help here (besides a better
> filesystem)?
Exactly :-)
Read-ahead, and a better suited file system is what makes SVN so fast
on Linux. We should get pretty close once we tackled the first one.
Bye,
Axel.
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