From: Breno Leitao <leitao@linux.vnet.ibm.com>
To: Eric Dumazet <dada1@cosmosbay.com>
Cc: "Brandeburg, Jesse" <jesse.brandeburg@intel.com>,
rick.jones2@hp.com, netdev@vger.kernel.org
Subject: Re: e1000 performance issue in 4 simultaneous links
Date: Fri, 11 Jan 2008 16:19:41 -0200 [thread overview]
Message-ID: <1200075581.9349.33.camel@cafe> (raw)
In-Reply-To: <47879DE4.8080603@cosmosbay.com>
On Fri, 2008-01-11 at 17:48 +0100, Eric Dumazet wrote:
> Breno Leitao a écrit :
> > Take a look at the interrupt table this time:
> >
> > io-dolphins:~/leitao # cat /proc/interrupts | grep eth[1]*[67]
> > 277: 15 1362450 13 14 13 14 15 18 XICS Level eth6
> > 278: 12 13 1348681 19 13 15 10 11 XICS Level eth7
> > 323: 11 18 17 1348426 18 11 11 13 XICS Level eth16
> > 324: 12 16 11 19 1402709 13 14 11 XICS Level eth17
> >
> >
> >
> If your machine has 8 cpus, then your vmstat output shows a bottleneck :)
>
> (100/8 = 12.5), so I guess one of your CPU is full
Well, if I run top while running the test, I see this load distributed
among the CPUs, mainly those that had a NIC IRC bonded. Take a look:
Tasks: 133 total, 2 running, 130 sleeping, 0 stopped, 1 zombie
Cpu0 : 0.3%us, 19.5%sy, 0.0%ni, 73.5%id, 0.0%wa, 0.0%hi, 0.0%si, 6.6%st
Cpu1 : 0.0%us, 0.0%sy, 0.0%ni, 75.1%id, 0.0%wa, 0.7%hi, 24.3%si, 0.0%st
Cpu2 : 0.0%us, 0.0%sy, 0.0%ni, 73.1%id, 0.0%wa, 0.7%hi, 26.2%si, 0.0%st
Cpu3 : 0.0%us, 0.0%sy, 0.0%ni, 76.1%id, 0.0%wa, 0.7%hi, 23.3%si, 0.0%st
Cpu4 : 0.0%us, 0.3%sy, 0.0%ni, 70.4%id, 0.7%wa, 0.3%hi, 28.2%si, 0.0%st
Cpu5 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu6 : 0.0%us, 0.0%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%st
Cpu7 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Note that this average scenario doesn't change during the entire
benchmarking test.
Thanks!
--
Breno Leitao <leitao@linux.vnet.ibm.com>
next prev parent reply other threads:[~2008-01-11 18:19 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-10 16:17 e1000 performance issue in 4 simultaneous links Breno Leitao
2008-01-10 16:36 ` Ben Hutchings
2008-01-10 16:51 ` Jeba Anandhan
2008-01-10 17:31 ` Breno Leitao
2008-01-10 18:18 ` Kok, Auke
2008-01-10 18:37 ` Rick Jones
2008-01-10 18:26 ` Rick Jones
2008-01-10 20:52 ` Brandeburg, Jesse
2008-01-11 1:28 ` David Miller
2008-01-11 11:09 ` Benny Amorsen
2008-01-12 1:41 ` David Miller
2008-01-12 5:13 ` Denys Fedoryshchenko
2008-01-30 16:57 ` Kok, Auke
2008-01-11 16:20 ` Breno Leitao
2008-01-11 16:48 ` Eric Dumazet
2008-01-11 17:36 ` Denys Fedoryshchenko
2008-01-11 18:45 ` Breno Leitao
2008-01-11 18:19 ` Breno Leitao [this message]
2008-01-11 18:48 ` Rick Jones
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