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From: Joe Greco <jgreco@brasil.moneng.mei.com>
Message-Id: <199604061920.NAA06139@brasil.moneng.mei.com>
Subject: Re: interrupts and such
To: imp@village.org (Warner Losh)
Date: Sat, 6 Apr 1996 13:20:33 -0600 (CST)
Cc: hackers@freebsd.org
In-Reply-To: <199604051725.KAA16272@rover.village.org> from "Warner Losh" at Apr 5, 96 10:25:43 am
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> I just did a vmstat -i on my 2.1R I notice that I get 100/s for clk0
> (which is what I'd expect) and 128/s for rtc0 on irq8.  This seems
> excessive to me to have both.  Also, I notice on an older 1.1.5.1R
> system that the rtc0 device isn't listed in vmstat's output.
> 
> So what is rtc0 and why is it acting like a clock interrupt?

Noticed today on news.sol.net:

hummin# vmstat -i
interrupt      total      rate
clk0 irq0    16981562      261
rtc0 irq8     8308881      128
fdc0 irq6           1        0
sc0 irq1         1831        0
ed0 irq10     9768007      150
Total        35060282      540

What the heck, with clk0?

The board is an ASUS Triton P90 with NCR-810 and AHA-3940 controller, one
SMC Ethernet, not much else..

The ASUS SP3G it replaced did not seem to exhibit that behaviour.

I see the same bizarre extra "irq0" oddity on Exec-PC's Triton board:

daily-planet# vmstat -i
interrupt      total      rate
clk0 irq0     7781389      495
rtc0 irq8     2010688      128
fdc0 irq6           1        0
sc0 irq1          167        0
lpt0 irq7           1        0
Total         9792246      623

Nifty :-)

... Joe

-------------------------------------------------------------------------------
Joe Greco - Systems Administrator			      jgreco@ns.sol.net
Solaria Public Access UNIX - Milwaukee, WI			   414/546-7968