From: Stephen Hemminger <shemminger@osdl.org>
To: Ben Greear <greearb@candelatech.com>
Cc: netdev@oss.sgi.com
Subject: Re: [PATCH] support for large number of network devices.
Date: Tue, 13 Jan 2004 16:38:28 -0800 [thread overview]
Message-ID: <20040113163828.64ec4743.shemminger@osdl.org> (raw)
In-Reply-To: <40048BFD.4010303@candelatech.com>
On Tue, 13 Jan 2004 16:23:25 -0800
Ben Greear <greearb@candelatech.com> wrote:
> Stephen Hemminger wrote:
> > When using pseudo network devices, and really big machines; there is
> > sometimes a need to have a lot of network devices. This replaces the
> > existing 2.6.1 limit of 100 entries an was O(n^2)
> > with a algorithm that will handle up to 32768 entries with O(n) behaviour.
>
> Might be a good time to put in hash tables to find network devices by
> name and by device-id. There are a few parts of the networking stack
> that do lookups, and walking the device list when it's 4k entries
> long takes a while...
I have a patch for name hashing, but don't know if it's needed.
Even without it I can add 9 thousand bridge entries,
and each one takes longer to start the command than add the entry now.
next prev parent reply other threads:[~2004-01-14 0:38 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-13 23:46 [PATCH] support for large number of network devices Stephen Hemminger
2004-01-13 23:59 ` David S. Miller
2004-01-14 0:13 ` Stephen Hemminger
2004-01-14 7:13 ` Matt Mackall
2004-01-14 19:37 ` Stephen Hemminger
2004-01-14 19:51 ` Matt Mackall
2004-01-14 20:11 ` David S. Miller
2004-01-15 0:24 ` Stephen Hemminger
2004-01-15 8:46 ` David S. Miller
2004-01-15 17:52 ` Stephen Hemminger
2004-01-15 19:40 ` David S. Miller
2004-01-14 0:23 ` Ben Greear
2004-01-14 0:38 ` Stephen Hemminger [this message]
2004-01-14 1:55 ` Ben Greear
2004-01-14 7:18 ` David S. Miller
2004-01-14 7:54 ` Ben Greear
-- strict thread matches above, loose matches on Subject: below --
2004-01-14 21:39 Jean Tourrilhes
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