Re: [PATCH] 2.4.0-prerelease: preemptive kernel.

[Daniel Phillips]

ludovic fernandez wrote:
> Right now I will be interested to run some benchmarks (latency but
> also performance) to see how the system is disturbed by beeing
> preemptable. I'm little bit lost on this and I don't know where to start.
> Do you have any pointers on benchmark suites I could run ?
> Also, maybe it's a off topic subject now....

No!  Not off topic.  And I hope you don't throw away that simple patch,
it will always be useful for doing reality checks on the performance of
the fancy system, and who knows, maybe it's useful in its own right.

The current fashion is to use dbench:

  ftp://samba.org/pub/tridge/dbench

I think this is good for your patch because it's inherently parallel. 
Interesting numbers of tasks are, e.g., 1, 2, 10, 50.   Of course dbench
is not the last word in benchmarks but it's been pretty useful so far. 
You probably want something entirely cpu-bound too.  How about dbench
with ramfs?

--
Daniel