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Message-Id: <199809290056.RAA06818@hub.freebsd.org>
Date: Mon, 28 Sep 1998 17:56:12 -0700 (PDT)
From: rtaylor@mpcs.com
To: freebsd-gnats-submit@FreeBSD.ORG
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Subject: i386/8081: Problem with MULTIPORT driver and Boca BB2016 board
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>Number:         8081
>Category:       i386
>Synopsis:       Problem with MULTIPORT driver and Boca BB2016 board
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:
>Keywords:
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Sep 28 18:00:00 PDT 1998
>Last-Modified:
>Originator:     Rob Taylor
>Organization:
MPC Systems
>Release:        Kernel 2.2.5
>Environment:
FreeBSD et 2.2.5-RELEASE FreeBSD 2.2.5-RELEASE #0: Sat Sep 26 20:48:20 EDT 1998
    rtaylor@et:/usr/src/sys/compile/ET  i386

>Description:
Am experiencing problems with the MultiPort driver.  Works
fine, is configured as spec'ed in the Manual.  Sio4-19 flags 0x1305
Works 99% of the time, but under high load conditions it seems to
miss an interrupt and and from that point on no further I/O is
processed from that IRQ or device
>How-To-Repeat:
Problem can easily be reapeated by setting all 16 ports to 115200 baud
and having traffic move on them.   Problem is worse with high baud rates.  Tried it with all set to 57600 baud and it was not as bad.
Tried faster CPU and it didn't help.

>Fix:
Lower Baud rate helps, but is not a solution.

>Audit-Trail:
>Unformatted:

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