Re: Core2 Duo 1.8 NetBSD 4BETA SLOWER than Celeron M 1.3 NetBSD3 - Help!

Lasse Hillerøe Petersen <[email protected]> wrote:
> Any suggestions as to what I should do with this machine (well, 
> obviously excluding suggestions to donate it, trash it etc) would be 
> most welcome! And if I have accidentally stumbled upon some rare -  
> maybe even subtle - bug, that only shows up under special circumstances 
> and loads, I sure would like to help get this fixed. I would file a PR - 
> if I wasn't so unsure as to what to write in it! If someone could 
> suggest some tests to run, I would be delighted to do so!

 I would start by watching the output of iostat and vmstat while the Core2
Duo machine is doing the work.

something like:

iostat -x 10

or

iostat wd0 wd1 10

keep in mind that the first line of output in both iostat and vmstat is a
summary since the performance counters were cleared, typically the last
reboot. The subsequent lines show real-time averages.

  See the man pages for explanations of the columns headings.

 If iostat or vmstat reports idle CPU while your job is running, then
often the bottleneck is I/O.


 -johan