Fine grain select locking.

[Robert Watson]

On Wed, 4 Jul 2007, Attilio Rao wrote:

> 2007/7/4, Robert Watson <rwatson at freebsd.org>:
>> There seem to be two parts of owning a benchmark:
>> 
>> - Establishing baselines over time -- how doe FreeBSD 4.8, 5.5, 6.0, 6.1, 
>> 6.2,
>>   6-STABLE weekly, 7-CURRENT weekly, and maybe a Linux or NetBSD version
>>   perform for the workload using otherwise identical configuration.
>> 
>> - Measurement and feedback -- identifying bottlenecks, working with 
>> developers
>>   to measure the results of specific optimizations, etc, across the life 
>> cycle
>>   of the patch.
>
> Another problem here would be about the hardware availabilty (obviously I'm 
> speaking about scalability improvements). Until now, tests have been done 
> mainly on amd64 machines provided by Kris and Jeff, IIRC. Having a wider 
> range of targets would help a lot in these cases.

The FreeBSD Foundation is currently working on updating the Netperf test 
cluster from dual-cpu HTT boxes to 8-core systems, and from 1gbps to 10gbps 
ethernet.  Hopefully this will improve access to larger multicore systems for 
developers without local hardware.  This project has been "in progress" for a 
while now, but will wrap up soon.

Robert N M Watson
Computer Laboratory
University of Cambridge