On Thu, 21 Oct 2010 01:37:07 +0200, Markus Kreiner <markuskrei...@gmx.net>
wrote:
> i *think* i also got the kernel with the DMA-patches, but am too much
> a linux novice to tell for sure, uname -a says:
> Linux debian 2.6.26-2-iop32x #1 Thu Sep 16 18:42:37 UTC 2010 armv5tel
> GNU/Linux

I downloaded the .deb files from Martin's repository and installed them
that way.  On my 2100, uname gives the following output:

Linux debian 2.6.26-2-iop32x #1 Sat Jun 26 17:51:30 UTC 2010 armv5tel
GNU/Linux

> 
> problem is, i barely get more than 800KB/s written to the N2100, no
> matter if via cable, wifi, samba, or ftp, it's always the same. read
> speeds are .. well.. better with ~4,5MB/s

For comparison, I get a consistent 8MiB/sec writing to my N2100 via samba
over a wired interface, from my mac.  The limiting factor seems to be the
samba server, since smbd consumes around 90% of CPU time.

Running the same benchmarks, I get lower throughput. I'm using a pair of
Seagate 2TB disks:

/dev/md2:
 Timing cached reads:   338 MB in  2.01 seconds = 168.37 MB/sec
 Timing buffered disk reads:   34 MB in  3.05 seconds =  11.15 MB/sec

$ dd count=1k bs=1M if=/dev/zero of=test.img
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 65.7327 s, 16.3 MB/s


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