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 -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
