Subject: Re: PPP and flow control
To: Michael L. VanLoon -- HeadCandy.com <michaelv@HeadCandy.com>
From: Eric S. Hvozda <email@example.com>
Date: 01/25/1996 05:34:28
On Wed, 24 Jan 1996 21:19:55 -0800 "Michael L. VanLoon -- HeadCandy.com" wrote:
> There was a go-round mid-late last year about how NetBSD simply
> doesn't service interrupts as quickly as, say, FreeBSD. I believe
> FreeBSD implemented some kind of virtual-DMA thing in their interrupt
> handler that's supposed to especially help their com (sio) driver.
I put great creedance in this:
Before I upgraded our Inet machine to 1.1 from 1.0, I was seeing 15-20%
Ierrs in netstat on ppp0. Today, after upgrading to 1.1 I see nearly
0% (0.008% is zero for me). This machine is a 486DX25 with 16550's
and an IDE disk in it.
Before I could only lock the serial port down at 19200 and still see silo
overflows from hell. Today, I have in locked down at 115200 and I
see silo overflows infrequently (if at all).