[Gllug] machine load testing

[Magnus Nilsson]

On Mon, 2002-12-02 at 17:56, Adam Bower wrote: 
> Andrew Halliwell wrote:
> 
> > adjust the -j to taste depending on memory. 10 is about right to push the
> > ram past 128meg. 20 should be enough for quite a lot, 30 is getting to the
> > point where ulimits get in the way.
> 
> Just for fun I tried the kernel thing anyhow, I started at -j 10 and it 
> wasn't very exciting, then -j 15, 20 30 and I got bored so I just tried 
> a make -j 50 bzImage and managed to get the load average to 51.46. The 
> box still didn't swap though, so it didn't really hammer the machine 
> enough I feel.
> 
> What I may have to do to really make it hurt is NFS mount one of its 
> disks and run bonnie on it over NFS (this is something I did accidentaly 
> once on a fileserver...) while building a kernel with make -j 50 =)

make -j dep clean bzImage modules modules_install

that way it wont limit the number of compiler processes. It will
probably completely drown your machine though, so don't have anything
remotely important running on the machine.
I crashed my workstation with that. When it finally let me login (after
crashing X), and I could run 'uptime' (top would've taken ages to load)
there was a load of ~250.
This was on a P3/800 with 384MB RAM.

-- 
Thanks,

Magnus Nilsson                  Office: +44 2070 700941
Systems Administrator           Mobile: +44 7973 796019
ADVFN.COM PLC


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