From owner-freebsd-questions Sat Nov 23 02:41:22 1996 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id CAA19201 for questions-outgoing; Sat, 23 Nov 1996 02:41:22 -0800 (PST) Received: from mail001.mediacity.com (mail001.mediacity.com [206.24.105.68]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id CAA19194 for ; Sat, 23 Nov 1996 02:41:11 -0800 (PST) From: brian@mediacity.com Received: (qmail-queue invoked from smtpd); 23 Nov 1996 10:40:53 -0000 Received: from home001.mediacity.com (HELO mediacity.com) (206.24.105.66) by mail001.mediacity.com with SMTP; 23 Nov 1996 10:40:52 -0000 Received: (qmail-queue invoked by uid 100); 23 Nov 1996 10:40:35 -0000 Message-ID: <19961123104035.17379.qmail@mediacity.com> Subject: Re: Hayes ESP and interrupt-level buffer overflows To: dwhite@resnet.uoregon.edu Date: Sat, 23 Nov 1996 02:40:35 -0800 (PST) Cc: freebsd-questions@freebsd.org In-Reply-To: from Doug White at "Nov 22, 96 01:44:12 pm" Reply-To: brian@mediacity.com X-Mailer: ELM [version 2.4ME+ PL22 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Brian Litzinger wrote: > > I have a Hayes ESP card hooked to as Motorola BSPro running at 230400. > > ... > > For the most part things work, but when I ftp stuff, I get > > sio2: X more interrupt-level buffer overflows (total xxx), Doug White wrote: > The ESP isn't able to keep up with 57600. Try dropping to 38400. Since the ESP has 1024 byte FIFOs with the RTS/CTS handshaking hardwired to the FIFO levels rather than under the control of the CPU, and is rated for 921600 operation it seems unlikely that the ESP is the problem. Changing TTYHOG to 4096 in sys/sys/tty.h, and RS_IBUFSIZE to 1024 in sys/i386/isa/sio.c cleaned the problem up for me. -- Brian Litzinger Powered by FreeBSD http[s]://www.mpress.com