Re: BUG: Massive performance drop in routing throughput with 2.4.21 (62KB)

From: Stephan von Krawczynski (skraw@ithnet.com)
Date: Wed Jun 18 2003 - 08:10:34 EST


On 17 Jun 2003 13:04:20 -0700
"David S. Miller" <davem@redhat.com> wrote:

> On Tue, 2003-06-17 at 12:33, Mr. James W. Laferriere wrote:
> > Hello All , Here goes . I made 'me too'ism in another thread
> > that may be related to what I am presenting here . After my .sig
> > is what I hope to be enough pertitanent information to get the bug
> > stomped on . This is driving me crazy . Also if someone would
> > like to point me at a URL:/Method(s)/... to be able to acquire
> > further information that would make the effort for those that
> > really can code in the kernel jobs easier please do .
> > The slow down mentioned below happens with any network based
> > connection . JimL
>
> You can start by reporting the bug and all your debugging
> informtion to the correct list.
>
> Networking developers DO NOT sit on linux-kernel, it's too high
> volume for them. So use the correct list to report such
> problems.

Maybe I should have made it a bit clearer in my original post to this thread:
the thing is a show-stopper. You can watch a 2.4.21 box drop down its
throughput to somewhere around 2-4 kByte/sec on a 100 MBit/sec switched
network. You have to setup a real routing-environment testbed to notice the
problem. I did not see it using any of the rc's as a simple host with all kinds
of network applications (including high volume nfs), but not routing...

Regards,
Stephan

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