* Andrew Morton <[email protected]> wrote:
> > > dd1 - copy 16 GB from /dev/zero to local FS
> > > dd1-dir - same, but using O_DIRECT for output
> > > dd2/dd2-dir - copy 2x7.6 GB in parallel from /dev/zero to local FS
> > > dd3/dd3-dir - copy 3x5.2 GB in parallel from /dev/zero lo local FS
> > > net1 - copy 5.2 GB from NFS3 share to local FS
> > > mix3 - copy 3x5.2 GB from /dev/zero to local disk and two NFS3 shares
> > >
> > > I did the numbers for 2.6.19.2, 2.6.22.6 and 2.6.24-rc1. All units
> > > are MB/sec.
> > >
> > > test 2.6.19.2 2.6.22.6 2.6.24.-rc1
> > > ----------------------------------------------------------------
> > > dd1 28 50 96
> > > dd1-dir 88 88 86
> > > dd2 2x16.5 2x11 2x44.5
> > > dd2-dir 2x44 2x44 2x43
> > > dd3 3x9.8 3x8.7 3x30
> > > dd3-dir 3x29.5 3x29.5 3x28.5
> > > net1 30-33 50-55 37-52
> > > mix3 17/32 25/50 96/35 (disk/combined-network)
> >
> > wow, really nice results!
>
> Those changes seem suspiciously large to me. I wonder if there's less
> physical IO happening during the timed run, and correspondingly more
> afterwards.
so a final 'sync' should be added to the test too, and the time it takes
factored into the bandwidth numbers?
> > I think the MM should get out of deep-feature-freeze mode - there's
> > tons of room to improve :-/
>
> Kidding. We merge about 265 MM patches in 2.6.24-rc1:
>
> 482 files changed, 8071 insertions(+), 5142 deletions(-)
impressive :)
Ingo
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