From owner-freebsd-current  Mon Oct  8 22:34:14 2001
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Date: Mon, 8 Oct 2001 23:34:01 -0600
From: "Kenneth D. Merry" <ken@kdm.org>
To: Alfred Perlstein <bright@mu.org>
Cc: Terry Lambert <tlambert2@mindspring.com>, current@FreeBSD.ORG
Subject: Re: Why do soft interrupt coelescing?
Message-ID: <20011008233400.A10777@panzer.kdm.org>
References: <3BBF5E49.65AF9D8E@mindspring.com> <20011006144418.A6779@panzer.kdm.org> <3BC00ABC.20ECAAD8@mindspring.com> <20011008231046.A10472@panzer.kdm.org> <20011009001857.R59854@elvis.mu.org>
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On Tue, Oct 09, 2001 at 00:18:57 -0500, Alfred Perlstein wrote:
> * Kenneth D. Merry <ken@kdm.org> [011009 00:11] wrote:
> > 
> > As you say above, this is actually a good thing.  I don't see how this ties
> > into the patch to introduce some sort of interrupt coalescing into the
> > ti(4) driver.   IMO, you should be able to tweak the coalescing parameters
> > on the board to do what you want.
> 
> No matter how hard you tweak the board, an interrupt may still
> trigger while you process a hardware interrupt, this causes an
> additional poll which can cause additional coalescing.

At least in the case of the Tigon, it won't interrupt while there is a '1'
written in mailbox 0.  (This happens in ti_intr().)

Ken
-- 
Kenneth Merry
ken@kdm.org

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