Re: 40% IDE performance regression going from FC3 to FC5 with same kernel

["Alessandro Suardi" <alessandro.suardi@gmail.com>]

On 4/8/06, Arjan van de Ven <arjan@infradead.org> wrote:
> On Sat, 2006-04-08 at 18:27 +0200, Alessandro Suardi wrote:
> > On 4/8/06, Arjan van de Ven <arjan@infradead.org> wrote:
> > >
> > > > Just for the record - no, even rebuilding same kernel with same GCC
> > > >  (3.4.4) under FC5, disk performance is much slower than FC3 -
> > > >  according to hdparm _and_ dd tests.
> > >
> > > what happens if you kill hald and other inotify using animals?
> >
> > Thanks Arjan for looking into this.
> >
> > Stopping hald brings hdparm from 18.5MB/s to 20MB/s, which is
> >  indeed a noticeable improvement, though still far from the FC3
> >  performance. I'm unsure what else can be stopped however
> >  from this process list:
> >
> >   274 ?        S<s    0:00 /sbin/udevd -d
>
>
> try killing that one next; it may or may not help but it's sure worth a
> try (esp given the success of the first kill :)

killing udevd doesn't bring any improvement - still at 20MB/s.

Do you want me to file a FC5 bugzilla entry with the current info
 or do you think there is something else that can be discussed
 on lkml ?

Thanks,

--alessandro

 "Dreamer ? Each one of us is a dreamer. We just push it down deep because
   we are repeatedly told that we are not allowed to dream in real life"
     (Reinhold Ziegler)