Does your benchmarks make something hit swap?
On Wed, 31 Jan 2001, Steve Lord wrote:
>
> To follow up on my own message - running some micro benchmarks, every single
> individual operation got faster, but dbench got slower.....
>
> Ho Hum.
>
> Steve
>
>
> > >
> > > On Wed, 31 Jan 2001, Steve Lord wrote:
> > >
> > > >
> > > > OK, I see what is going on here - and I think this could actually
> > > > break regular XFS as well - if you use the loop device on a highmem
> > > > machine. I will fix it in my 2.4.1 merge which should be out in cvs
> > > > in a day or two. 2.4.1 is running with XFS, but I am not happy with
> > > > what the kernel changes have done to performance.
> > >
> > > Steve,
> > >
> > > Could you please describe what performance problems are going on?
> > >
> >
> >
> > It is difficult to nail down the cause yet, but dbench has taken a
> > significant hit (40%). Single file (bonnie) is comparable with 2.4.0, the
> > dbench issue may be related to the throttling being placed on the
> > ll_rw_block interface by Jens' changes. The problem with working out
> > a bottleneck in dbench is it is such a random pile of stuff that
> > you really cannot point a finger at any one thing. I need to go
> > find some more deterministic measurements.
> >
> > The performance drop off is not limited to xfs though ext2 appears
> > to suffer as well.
> >
> > Steve
> >
>
>
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