Fine grain select locking.

[Jeff Roberson]

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.

Yes, definitely.  For the scheduler work I often see certain decisions 
fair worse on different platforms even running the same workload.  It 
would be valuable to me to have a wider array of hardware as well as 
benchmarks.  The netperf cluster helps, but for general scheduler work I 
also need to know how it fares on a large variety of platforms.

Thanks,
Jeff


>
> Attilio
>
>
> -- 
> Peace can only be achieved by understanding - A. Einstein
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