On Fri, 26 Oct 2007 21:33:40 +0200
Ingo Molnar <[email protected]> wrote:
>
> * 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?
That's one way of doing it. Or just run the test for a "long" time. ie:
much longer than (total-memory / disk-bandwidth). Probably the latter
will give a more accurate result, but it can get boring.
> > > 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 :)
A lot of that was new functionality. That's easier to add than things
which change long-standing functionality.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
