Subject: Re: individual hme sbus cards vs quad hme sbus cards
To: doomwarrior <doomwarriorx@gmail.com>
From: Bruce O'Neel <edoneel@sdf.lonestar.org>
List: port-sparc
Date: 08/12/2006 18:51:56
Hi,

On Thu, Aug 10, 2006 at 08:00:53PM +0200, doomwarrior wrote:
<snip>

> 
> so i start my apache on the 'sparky' and wget from my  pc, first with 
> le0, second with the hme0
> 
> 96.419.840   876.52K/s    ETA 00:00
> 96.419.840     2.13M/s    ETA 00:00
> 
> only 2Megs per seconds.  I thourghed I would get at least a boost to 
> 5Megs or so.  What can I do to speed up the system to (at least)
> 3Megs, because I want to upgrade to a faster internet connection, 
> without changing my lovely 'sparky'.

I've never been able to get more than 2 some meg/secs through a hme on
a ss20 when the data is going into user space (say via ftp, wget,
etc).  I have, when running OpenBSD and bridging across the different
interfaces on a quad hme card in a SS20, gotten two Ultras talking at
4-5 meg/sec.  This pretty much pegs the SS20.  If your firewall
doesn't do too much you might be able to get the SS20 to move 3meg/sec
between two hme cards.

With my collection of SS20s and Mbus cards I've found that:

- 180mhz Hypersparcs are the fastest in raw CPU.  That said they don't
do such a good job with i/o and things go downhill fast i/o wise when
you have 2 of them.  My guess here is that the mbus gets saturated
talking to memory.

- 85mhz SuperSparc IIs are quite fast i/o wise.  The big cache might
help.

- 133 and 142mhz Hypersparcs are also fast, and, i/o wise, seem faster
than the 180mhz ones.  The 142s with the 1meg of cache are very
pleasing to work with, but, they also put out a bit of heat.

cheers


bruce


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