[haiku-development] Re: IO scheduler Priority
- From: Ingo Weinhold <ingo_weinhold@xxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Wed, 19 Nov 2008 15:47:03 +0100
On 2008-11-19 at 15:08:39 [+0100], Stephan Assmus <superstippi@xxxxxx> wrote:
> Clemens Zeidler wrote:
> >
> > inspired by the "IO scheduler regression?" thread I like to ask a
> > question I have for some time.
> > At our university linux cluster we have a nfs home directory server. When
> > now a user perform very many io action the whole cluster is damm slow
> > because every application is waiting for the network. Also on BeOS I ran
> > into the problem when for example I run svn the Deskbar hangs for some
> > short time because it try to read files from a busy disk.
> >
> > Is it an option to propagate the thread priority to the io scheduler? So
> > a thread with B_DISPLAY_PRIORITY gets higher priority to access the disc
> > then e.g. svn or jam.
>
> AFAIK, this is already the case on Haiku.
Indeed. Unfortunately the I/O scheduler totally ignores all I/O priorities
ATM. The scheduling strategy really needs to be revised.
CU, Ingo
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