Subject: Re: interactive responsiveness
To: Steve Bellovin <>
From: None <>
List: current-users
Date: 02/02/2004 18:06:36

This is really impressive!I enabled  NEW_BUFQ_STRATEGY and softdeps and i see
*much* better disk perfomance!

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
          500 51806 57.0 51928 22.1 11553  5.0 48381 56.8 50732 13.8 420.7  2.8

Before that i got 42-45MB/sec on U160 disks!


Quoting Steve Bellovin <>:

> Using a kernel from Saturday, with NEW_BUFQ_STRATEGY set but otherwise 
> default options (and in particular with default sysctl settings for 
> vm.), I'm seeing *excellent* responsiveness.  I don't know what the 
> changes were, but from my perspective, they're working just fine.  
> (Note: I do not use softdep)
> 		--Steve Bellovin,

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