Date: Tue, 28 Oct 1997 06:10:33 -0500 (EST) From: Thomas David Rivers <rivers@dignus.com> To: perlsta@cs.sunyit.edu, rivers@dignus.com Cc: freebsd-hackers@freefall.FreeBSD.org Subject: Re: sio silo overflows on a P75 @ 38400 baud? Message-ID: <199710281110.GAA06120@lakes.dignus.com>
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> > you are quite possbily over loading your system with a combination of > writes and swapping (8megs of ram? ewwww) Hmm... good point. > > if disk activity is constant it's quite possible to reach a load of 9.0+ > i did while doing a buildworld and making my kernel -j8... it was at like > 9.6+ at times... pretty cool as X kept freezing for several seconds at a > time... But - the disk activity isn't constant; it's no where near that (being a little twiddle about every 13 seconds). In fact, uptime shows my load average as 7:02AM up 8:52, 2 users, load averages: 0.00, 0.00, 0.00 So, I don't believe that's the culprit. In the span of this 8:52 hours, though, I've only seen 3 silo overflows... So, the issue appears to be intermittent... (which makes it more aggravating... :-) ) - Dave Rivers - > > On Mon, 27 Oct 1997, Thomas David Rivers wrote: > > > > > I was just wondering - should it be possible, at 38400 baud, > > in multi-user mode, but nothing else really going on; to get > > silo overflows on a P75 with 16550 (clone?) UARTs? > > > > I'm doing a SL/IP connection and sending the output of > > dd'ing a tape back to the P75 system for un-tarring. The > > sending system is a P200 (running FreeBSD 2.2-970510.) > > > > I'm getting these silo overflows with 2.2.5. > > > > I'm hoping someone can whip out some figures on the > > interrupt latency to suggest that a P75 should be able > > to deal with receiving 38400... > > > > This could, of course, be an artifact of some device > > holding the bus too long. The P75 machine is a laptop > > with a IDE drive (to which I'm writting) and 8 meg of memory; > > again, running 2.2.5-RELEASE. > > > > - Thanks - > > - Dave Rivers - > > > >
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