Subject: Re: resend: Upgrading processor / DECREASED network performance
To: Rick Byers <>
From: David Brownlee <>
List: port-i386
Date: 10/25/1999 12:06:15
	Have you tried using something like ttcp from pkgsrc to get some
	idea of network speed between a machine on the inside and the
	NAT box, and if you can find a friendly machine on the outside,
	between them?


On Sun, 24 Oct 1999, Rick Byers wrote:

> The card that I think is causing the problem is a Racal NI6510 which is a
> NE2100 clone (uses the nele driver).  The other card is a 3Com 3C509B (ep
> driver).  I'm using 10BaseT links.  The NetBSD version didn't change, but I
> did compile a new kernel (with all the PCI bus stuff etc.).  Actually, I
> did compile MROUTING into the kernel for the first time, could that be
> causing performance problems?  The only other software thing that changed
> is that I upgraded the version of ipfilter to 3.2.10, but I did that a few
> days before the hardware upgrade and people didn't start complaining until
> JUST after the hardware upgrade.  The only other services that run on the
> box are named, sendmail, imapd, samba, and apache, but all of those are
> barely used at all (just my e-mail, the occasional DNS lookup, and the
> occasional connection to the HTTP server for netscape Roaming Profile
> stuff).  The 386 was running all those services too (although MUCH slower).
> Any of this sound like it could be causing a problem?  Thor told me that
> ISA DMA on PCI machines gets a low priority and is probably what's causing
> the slowdown.  I plan on picking up a few PCI network cards sometime soon -
> hopefully that'll fix the problem.
> Thanks!
> 	Rick
> Ross Harvey wrote:
> > 
> > > [ network is slow after 386/25 -> P90 upgrade ]
> > 
> > You said you were using the same ISA network cards. But which card? What's
> > the speed of the links? Did the NetBSD version change? And what version?
> > You said you are compiling things. A new kernel? Do any services run on it
> > besides packet forwarding?
> -- 
> =========================================================================
> Rick Byers                       University of Waterloo, Computer Science