Re: lmbench results for 2.4 and 2.5 -- updated results

["Martin J. Bligh" <mbligh@aracnet.com>]

>> > I presume it does 100 iterations of a test (like fork latency?). Or does 
>> > it just do one? Can I make it do 1,000,000 iterations or something
>> > fairly easily ? ;-) I didn't really look closely, just apt-get install
>> > lmbench ... 
>> 
>> Yes, that is something I've wanted several times.  Just a way to say "run
>> this test for ever so I can profile the thing".
>> 
>> Even a sleazy environment string would suffice.
> 
> It's been there, I suppose you need to read the source to figure it out
> though the lmbench script also plays with this I believe.

Yay! Thank you.
 
> work ~/LMbench2/bin/i686-pc-linux-gnu ENOUGH=1000000 time bw_pipe
> Pipe bandwidth: 655.37 MB/sec
> real    0m23.411s
> user    0m0.480s
> sys     0m1.180s
> 
> work ~/LMbench2/bin/i686-pc-linux-gnu time bw_pipe
> Pipe bandwidth: 809.81 MB/sec
> 
> real    0m2.821s
> user    0m0.480s
> sys     0m1.180s

Mmmm. Any idea why the results are so dramtically different? 655 vs 809?
Looks odd ;-)

m.