From owner-freebsd-current  Wed Mar  4 19:45:28 1998
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Message-ID: <19980304224540.64292@scsn.net>
Date: Wed, 4 Mar 1998 22:45:40 -0500
From: dmaddox@scsn.net (Donald J. Maddox)
To: Mike Smith <mike@smith.net.au>, dmaddox@scsn.net
Cc: Evan Champion <evanc@synapse.net>,
        Matthew Thyer <Matthew.Thyer@dsto.defence.gov.au>,
        shimon@simon-shapiro.org, current@FreeBSD.ORG
Subject: Re: silo overflows (Was Re: 3.0-RELEASE?)
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	Evan Champion <evanc@synapse.net>,
	Matthew Thyer <Matthew.Thyer@dsto.defence.gov.au>,
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References: <19980304221012.62373@scsn.net> <199803050332.TAA23822@dingo.cdrom.com>
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In-Reply-To: <199803050332.TAA23822@dingo.cdrom.com>; from Mike Smith on Wed, Mar 04, 1998 at 07:32:25PM -0800
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On Wed, Mar 04, 1998 at 07:32:25PM -0800, Mike Smith wrote:
<SNIP>
> > 
> > Add this to your system conf:
> > 
> > options		"MSIZE=256"
> 
> Interesting; why change the mbuf size?  Is this a recommended change 
> for general operation, or is 128 bytes still preferred?
> 
> > options		"TTYHOG=4096"
> 
> This increases tty-internal buffers, but wouldn't be expected to affect 
> interrupt latency.  (There may be some carryover though.)
> 
>  - Were you seeing "silo overflow" messages?
>  - Have the above changes affected your actual throughput?

Sorry, I didn't read the original message closely enough...  I was
actually getting interrupt-level buffer oflows, not silo oflows.  This
fix is for a different problem :-/

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