On Sat, Jan 22, 2011 at 11:49:43AM +0700, Mulyadi Santosa wrote: > On Fri, Jan 21, 2011 at 20:25, Mag Gam <[email protected]> wrote: > > Anyone had a chance to try this? :-) > > $ for a in `seq 1 3`; do \time dd bs=4K count=1M if=/dev/zero of=/dev/null; > done
Hm, I also wrote a little script to go through more values of bs. The script is attached. To change what values to use for bs, change the variables $min, $step, and $max at the beginning of the script, which are the parameters for "seq". To get a graph of throughput versus bs, use it like so: $ ./pipespeed.sh > data [...] $ gnuplot plot "data" w l The highest I get is 8.5 GB/s with bs=22528 on 2.6.37. How can you get a speed of 30 GB/s? It seems excessively fast. :) Greetings, Henry
pipespeed.sh
Description: Bourne shell script
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