Subject: RE: High CPU utilization with Bonding driver ?

From: "Ravinandan Arakali" <[email-masked]>
Date: Mon, 4 Apr 2005 17:49:07 -0700

Arthur,
On what kernel version should your below mentioned patch be applied ? 
We tried on one of the older kernels(2.6.5) and got an Oops while 
loading the bonding driver.

Thanks,
Ravi

-----Original Message-----
From: Arthur Kepner [mailto:[email-masked]]
Sent: Tuesday, March 29, 2005 10:29 AM
To: Ravinandan Arakali
Cc: [email-masked]; [email-masked]; Leonid.
Grossman (E-mail); Raghavendra. Koushik (E-mail)
Subject: Re: High CPU utilization with Bonding driver ?

On Tue, 29 Mar 2005, Ravinandan Arakali wrote:

> ....
> Results(8 nttcp/chariot streams):
> ---------------------------------
> 1. Combined throughputs(but no bonding):
> 3.1 + 6.2 = 9.3 Gbps with 58% CPU idle.
> 
> 2. eth0 and eth1 bonded together in LACP mode:
> 8.2 Gbps with 1% CPU idle.
> 
> From the above results, when Bonding driver is used(#2), the CPUs are
> completely maxed out compared to the case when traffic is run
> simultaneously on both the cards(#1).
> Can anybody suggest some reasons for the above behavior ?
> 

Ravi;

Have you tried this patch? 

http://marc.theaimsgroup.com/?l=linux-netdev&m=111091146828779&w=2

If not, it will likely go a long way to solving your 
problem.

--
Arthur