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Date:      Mon, 20 May 1996 12:54:29 +1000
From:      Bruce Evans <bde@zeta.org.au>
To:        coredump@nervosa.com, taob@io.org
Cc:        freebsd-hackers@FreeBSD.ORG
Subject:   Re: Slow tty updates and high load, but idle CPU
Message-ID:  <199605200254.MAA00774@godzilla.zeta.org.au>

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>all at once, or in round-robin fashion.  However, all experience the
>one-second delay between updates.  A stuck select() somewhere, perhaps?

ttwrite() is probably sleeping on lbolt.  This should be easy to check
by looking at the sleep address in ps output.  ttwrite() sleeps on lbolt
when the system runs out of clists.  clists may run out because they are
broken as designed or because of a bug that was fixed in -current on
1995/12/15 and in -stable on 1996/01/03.

Bruce



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