Date: Sat, 29 Apr 2000 10:47:49 +1000 From: Peter Jeremy <peter.jeremy@alcatel.com.au> To: "Sergey A. Ivanov" <lw@pd.chel.ru> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: sio interrupt handler problem Message-ID: <00Apr29.104753est.115205@border.alcanet.com.au> In-Reply-To: <5564.000424@pd.chel.ru>; from lw@pd.chel.ru on Mon, Apr 24, 2000 at 05:34:37PM %2B1000 References: <5564.000424@pd.chel.ru>
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On Mon, Apr 24, 2000 at 05:34:37PM +1000, Sergey A. Ivanov wrote: > I have 4.0S installed on old 468dx66. Part of dmesg: > >sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0 >sio0: type 16450 [Gives SILO overflows at 38.4k] I agree that 16450's are best avoided, but this should still work. I can get 38.4k through a 16450 using pppd in 2.2.5 on a 386DX25 (though it won't do 57.6k). A 486dx66 has about 5 times the CPU power, the overall system should be at least twice as fast. I don't believe that 4.0S has more than doubled the interrupt overheads, so there must be some other explanation. What other related activity do you have? Are you loading the other serial port or parallel port? Peter To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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