Date: Sun, 08 Dec 1996 20:03:36 -0800 From: David Greenman <dg@root.com> To: Bruce Evans <bde@zeta.org.au> Cc: hackers@freebsd.org, proff@suburbia.net Subject: Re: strange problems with recent current Message-ID: <199612090403.UAA13347@root.com> In-Reply-To: Your message of "Mon, 09 Dec 1996 14:19:33 %2B1100." <199612090319.OAA12973@godzilla.zeta.org.au>
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>>Dec 8 02:37:59 evil /kernel: cy15: 5 more silo overflows (total 3876) >>Dec 8 02:38:00 evil /kernel: cy8: 1 more silo overflow (total 7) >>... >>This has crept in sometime during the past few days. > >On what hardware? The PCI cy driver doesn't use a "fast" interrupt >handler yet, so silo overflows are quite likely for it. E.g., updating >the keyboard LEDs takes a few msec, so a few fifos full of input may >be dropped on each port whenever you hit caps lock (the fifo fills up >in 1 msec at 115200 bps). If you are using the PCI cy adapter, you might want to get the "cytest" program from the Cyclades ftp site and change the memory mapping mode to >1MB. When the card is mapped into the <1MB region, the shared memory operates much slower on some motherboards (Triton chipset, perhaps others). It's actually 50% slower than ISA in this case. -DG David Greenman Core-team/Principal Architect, The FreeBSD Project
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