Performance numbers?

[Eric Anderson]

Hi GEOMers!

Does anyone have any benchmarks or numbers relating to GEOM performance?

I tried doing some on my own, but I didn't get very satisfactory  
results, so I'm curious what others have seen or used.

My hardware is a Core 2 Quad, with 4GB of ram.

First, I made an mdconfig'ed malloc backed 'disk' of 1.5GB.  Then, I  
tried running such tools as rawio, and diskinfo.  rawio fails with  
input/output errors, and diskinfo wants a larger device to give the  
full stats.  I ended up using purely dd since that worked.   
Interestingly enough, dd'ing to the malloc device results in about  
1000 operations per second, regardless of a blocksize of 512bytes or  
1MB.

Do you all expect this 1000 operations per second to be limited by the  
mdconfig'ed device, GEOM, both, all, none, ??  I'm looking for  
pointers here mostly.  I really would like to see how many operations  
(512byte really) the GEOM infrastructure can do on a particular piece  
of hardware, so if there is a simpler way to do this test, give me a  
hint.  :)

Thanks!
Eric