Date: Fri, 30 May 1997 04:14:28 +1000 From: Bruce Evans <bde@zeta.org.au> To: hackers@FreeBSD.ORG, paulo@nlink.com.br Cc: isp@FreeBSD.ORG Subject: Re: Cyclades PCI Strange Behavior Message-ID: <199705291814.EAA24203@godzilla.zeta.org.au>
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>a Pentium 133 with Intel i430vx Motherboard >32MB RAM. >1.2GB IDE HardDrive >a Trident PCI Video Card >A cyclades PCI Cy32 card mapped to high memory >32 dial-in modems >We are getting a lot of silo overflows that get more frequently when we >start using the computer ( very frequent when we compile the kernel ). >If we start an upload to the computer, we have very much silo overflows >than in a download. Silo overflows are probably normal for the PCI version of the driver. It uses a normal low-priority interrupt handler which can be delayed for several msec by other interrupt handlers. At 115200 bps, there is about 1 silo overflow for ever msec of delay. Delays of 3-5 msec are normal for updating the keyboard LEDs. Delays of 0.1-1 msec are normal for IDE drives and PIO ethernet cards. Delays accumulate. >After about 1 day with the system running it JUST RESETS without any >message in the screen if we SWITCH ONE OF THE MODEMS OFF AND ON AGAIN ( >Just after we turn if on ). This is probably unrelated. There is a software bug that causes the timeout table to fill up under certain overloads, but this normally causes panics with a message. Bruce
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