From: Benjamin LaHaise <bcrl@redhat.com>
To: "David S. Miller" <davem@redhat.com>
Cc: ak@muc.de, sim@netnation.com, linux-kernel@vger.kernel.org
Subject: Re: Awfully slow /proc/net/tcp, netstat, in.identd in 2.4 (updated)
Date: Fri, 19 Oct 2001 17:30:55 -0400 [thread overview]
Message-ID: <20011019173055.G9206@redhat.com> (raw)
In-Reply-To: <20011019145750.A22193@zero.firstfloor.org> <20011019085944.A16467@netnation.com> <k23d4fwkv6.fsf@zero.aec.at> <20011019.135924.112609345.davem@redhat.com>
In-Reply-To: <20011019.135924.112609345.davem@redhat.com>; from davem@redhat.com on Fri, Oct 19, 2001 at 01:59:24PM -0700
On Fri, Oct 19, 2001 at 01:59:24PM -0700, David S. Miller wrote:
> And, for a 640MB ram machine, a 4MB hash table is perfectly
> reasonable.
That isn't wholly true. A 4MB hash table can never fit in the cache of
an Athlon, and for one that's being used as a workstation with 1GB of
ram and maybe 60 connections active on average, that's a huge waste of
ram, and a guarantee that there will be lots of cache misses which just
aren't required. Keep the cache footprint as low as possible -- it
results in a system that performs better.
-ben
next prev parent reply other threads:[~2001-10-19 21:30 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-18 16:42 Awfully slow /proc/net/tcp, netstat, in.identd in 2.4 (updated) Simon Kirby
2001-10-18 16:49 ` David S. Miller
2001-10-18 17:05 ` Simon Kirby
2001-10-19 12:57 ` Andi Kleen
2001-10-19 15:59 ` Simon Kirby
2001-10-19 18:22 ` Andi Kleen
2001-10-19 20:59 ` David S. Miller
2001-10-19 21:30 ` Benjamin LaHaise [this message]
2001-10-19 21:56 ` David S. Miller
2001-10-19 22:04 ` Benjamin LaHaise
2001-10-19 22:11 ` David S. Miller
2001-10-19 22:13 ` Benjamin LaHaise
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