From: Eric Dumazet <eric.dumazet@gmail.com>
To: leroy christophe <christophe.leroy@c-s.fr>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Huge performance degradation for UDP between 2.4.17 and 2.6
Date: Thu, 02 Aug 2012 16:13:56 +0200 [thread overview]
Message-ID: <1343916836.9299.189.camel@edumazet-glaptop> (raw)
In-Reply-To: <501A722D.1070900@c-s.fr>
On Thu, 2012-08-02 at 14:27 +0200, leroy christophe wrote:
> Hi
>
> I'm having a big issue with UDP. Using a powerpc board (MPC860).
>
> With our board running kernel 2.4.17, I'm able to send 160000 voice
> packets (UDP, 96 bytes per packet) in 11 seconds.
> With the same board running either Kernel 2.6.35.14 or Kernel 3.4.7, I
> need 55 seconds to send the same amount of packets.
>
>
> Is there anything to tune in order to get same output rate as with
> Kernel 2.4 ?
kernel size is probably too big for your old / slow cpu.
Maybe you added too many features on your 3.4.7 kernel. (netfilter ?
SLUB debugging ...)
Its hard to say, 2.4.17 had less features and was faster.
next prev parent reply other threads:[~2012-08-02 14:14 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-02 12:27 leroy christophe
2012-08-02 14:13 ` Eric Dumazet [this message]
2012-08-05 8:16 ` LEROY christophe
2012-08-05 8:28 ` Eric Dumazet
2012-08-06 9:27 ` leroy christophe
2012-08-03 5:12 ` Chris Friesen
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