From owner-freebsd-current  Thu Nov  6 18:19:01 1997
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Date: Thu, 6 Nov 1997 18:18:46 -0800 (PST)
From: Jaye Mathisen  <mrcpu@cdsnet.net>
To: Simon Shapiro <Shimon@i-Connect.Net>
cc: freebsd-current@FreeBSD.ORG
Subject: Re: More on fast make world...
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I actually did a complete MFS based mount of /usr/src and /usr/obj and did
a build world.  I sent the times in, I don't remember what they where any
more, something like 1:50 or 1:40 or so.

On Mon, 3 Nov 1997, Simon Shapiro wrote:

> I really am not so sure what takes the time, but it is not disk I/O.
> 
> I setup a test machine with 128MB of RAM, a RAID-1 root disk, a RAID-0
> 8x32KB stripes wide for /usr/src and /usr/obj, on a DPT PM3334UDW (Ultra,
> wide, differential).  Disks are 4GB Barcudas all around.
> 
> This configuration is capable of 980+ disk I/O per second on the RAID-1 and
> 1740+ on the RAID-0 array.
> 
> Starting with a fresh install, SMP kernel current for today, DPT configured
> with no options, but the performance monitors and a 1 sec timeout hack to
> catch lost interrupts (new firmware that may be a bit buggy).
> 
> Top reports (abbreviated):
> 
> load averages:  7.36,  6.59,  5.06
> CPU states: 54.1% user, 0.0% nice, 44.4% system, 1.6% interrupt, 0.0%idle
> Mem: 11M Active, 17M Inact, 23M Wired, 47M Cache, 8248K Buf, 26M Free      
> 
> Iostat says:
> 
>       tty          sd0          sd16          cpu
>  tin tout sps tps msps  sps tps msps  us ni sy in id
>    0 1905 771  74  0.0  668  56  0.0  27  0 51  2 20
> 
> This is typical over the last hour or so.  Anything else I should try?
> 
> Simon
>  
>