Reduced hard disk perfomance on 5.4 with SMP

[Tarasov Alexey]

Kris Kennaway wrote:
>
> VFS was Giant-locked on 5.4, and there is contention between multiple
> processes (e.g. tar and bufdaemon).  Try 6.0 instead.
>   
I've updated server to RELENG_6_0. Results of hard disk test:

> /usr/local/bin/bonnie
> File './Bonnie.37454', size: 104857600
> Writing with putc()...done
> Rewriting...done
> Writing intelligently...done
> Reading with getc()...done
> Reading intelligently...done
> Seeker 1...Seeker 2...Seeker 3...start 'em...done...done...done...
>               -------Sequential Output-------- ---Sequential Input-- 
> --Random--
>               -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- 
> --Seeks---
> Machine    MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU  
> /sec %CPU
>           100  3733  3.8  3112  1.0  2691  1.5 105299 99.9 1451514 
> 100.0 61287.7 180.5


Compare with my home computer results:

> bonnie
> File './Bonnie.36180', size: 104857600
> Writing with putc()...done
> Rewriting...done
> Writing intelligently...done
> Reading with getc()...done
> Reading intelligently...done
> Seeker 1...Seeker 2...Seeker 3...start 'em...done...done...done...
>               -------Sequential Output-------- ---Sequential Input-- 
> --Random--
>               -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- 
> --Seeks---
> Machine    MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU  
> /sec %CPU
>           100 47381 32.2 48026  9.2 44852  8.7 83843 68.5 1184280 78.9 
> 84180.4 82.5

-- 
Best regards,
Tarasov Alexey.