Date: Sun, 30 Jun 1996 03:05:52 +1000 From: Bruce Evans <bde@zeta.org.au> To: bde@zeta.org.au, msmith@atrad.adelaide.edu.au Cc: Kevin_Swanson@BLaCKSMITH.com, bsdi-users@bsdi.com, hardware@FreeBSD.org, jparnas@jparnas.cybercom.net, stesin@elvisti.kiev.ua Subject: Re: muliport boards - building a PPP dialup server Message-ID: <199606291705.DAA11614@godzilla.zeta.org.au>
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>It wouldn't surprise me for some other part of the system to block >serial interrupts for 1/2msec or longer; FIFO overflows on a 16550 occur >on occasion on an X workstation running at 38k4, ie. 4ms worth of FIFO. >Hence the comment about a dedicated system. That's a bug in the other part of the system (probably the X server or the graphics card). There are no known bugs in this area in the kernel software since I fixed everything that blocked serial interrupts for more than a few microseconds before I worked on the serial driver. The maximum latency is about 10 usec on a 486/33. Bruce
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