Some n2100 benchmarks of available arm kernels
On Mon, Aug 04, 2008, Ross Burton wrote:
> > Still no progress, but I just made 2.6.25 kernels available with the
> > DMA patches applied. This kernel is largely untested, but it includes
> > the same patch from Dan Williams that I tested before and that seems
> > to work.
> > Any feedback is welcome. Use at your own risk.
> > http://merkel.debian.org/~tbm/tmp/n2100/dma/
> I've been using this kernel for some time on my N2100 now, and the
> improvement in disk IO performance is substantial. I'd love to see this
> merged into lenny's kernel but I realise I should have sent this email a
> few weeks ago for that to be in any way possible...
Here are some performance tests I did with various arm kernels. Test
was to hdparm -t /dev/sda, then sdb, twice; results below are average
speed of each 4 hdparm runs sequence. The speed of sda versus sdb was
always very close (the disk parts match).
Kernel Version Read speed (MB/sec)
----------------------------------------------------------------
2.6.18-3-iop32x 2.6.18-7 21.46 # etch?
2.6.18-6-iop32x 2.6.18.dfsg.1-22 21.37 # etch.3
2.6.24-etchnhalf.1-iop32x 2.6.24-6~etchnhalf.4 16.22 # etch 1/2
2.6.25-2-iop32x 2.6.25-2iop1 20.84 # Martin's
2.6.25-2-iop32x 2.6.25-7 15.73 # lenny
2.6.26-1-iop32x 2.6.26-1 16.05 # unstable
Didn't try armel kernels yet.
--
Loïc Minier
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