Date: Thu, 26 Mar 1998 16:50:22 +0200 (EET) From: Penisoara Adrian <ady@warpnet.ro> To: Bruce Evans <bde@zeta.org.au> Cc: current@FreeBSD.ORG Subject: Re: silo overflows (Was Re: 3.0-RELEASE?) Message-ID: <Pine.BSF.3.96.980326164558.1596D-100000@ady.warpnet.ro> In-Reply-To: <199803252322.KAA29759@godzilla.zeta.org.au>
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Hi, On Thu, 26 Mar 1998, Bruce Evans wrote: > > Likewise, here it is my experience with a CYCLADES Cyclom 16YeP multiport > >board & FreeBSD 3.0-971117-SNAP, both UP & SMP case (please nota that I > >used the COM ports before installing the multiport board and did get zero > >"silo overflow"s; also, setting speed to 115200 rather than 57600 makes > >the no. of overflows grow faster): > > This problem is well known. The PCI version of the cy driver doesn't > use fast interrupts, so at 115200 bps, it is likely to drop about N fifos > full of input whenever another driver preempts of masks cy interrupts for > N+0.5 msec. The keyboard driver usually masks (non-fast) cy interrupts > for more than several msec to program the keyboard LEDs; PIO drivers > like the PIO wd driver can preempt (non-fast) interrupts for even longer > if the disk is fast and the controller is slow... I suppose there is work undergoing about this very issue... I'm willing to help, I'd love to even (finally, something to "repay" your efforts, my good men :) ), as soon I'll get the forthcoming 6.4Gb SCSI HD beast oline... > > >---------- > >Mar 25 19:46:01 ady /kernel: cy0: 1 more silo overflow (total 177) > >Mar 25 19:50:26 ady /kernel: cy0: 1 more silo overflow (total 178) > >Mar 25 19:50:58 ady /kernel: cy2: 1 more silo overflow (total 13) > >Mar 25 20:02:03 ady /kernel: cy0: 1 more silo overflow (total 179) > >Mar 25 20:03:11 ady /kernel: cy0: 1 more silo overflow (total 180) > > It's doing well to get only one at a time :-). Yes, but it's sometimes pretty annoying. Oh well, as someone was saying, better know about it rather than forget it... ;) > > Bruce > Thanks! Ady (@warpnet.ro) Warp Net Technologies To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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