From: Eric Dumazet <dada1@cosmosbay.com>
To: Christoph Lameter <cl@linux.com>
Cc: David Miller <davem@davemloft.net>,
Michael Chan <mchan@broadcom.com>,
Ben Hutchings <bhutchings@solarflare.com>,
netdev@vger.kernel.org
Subject: Re: Network latency regressions from 2.6.22 to 2.6.29 (results with IRQ affinity)
Date: Sat, 18 Apr 2009 10:18:22 +0200 [thread overview]
Message-ID: <49E98CCE.2000701@cosmosbay.com> (raw)
In-Reply-To: <alpine.DEB.1.10.0904171238550.20049@qirst.com>
Christoph Lameter a écrit :
> On Thu, 16 Apr 2009, David Miller wrote:
>
>> We really need to find a good way to fix that IRQ affinity issue.
>
> Here are the results with setting interrupt affinity. We are still loosing
> 5 usecs from .22 to .30-rc2. We will investigate more in depth time
> permitting.
>
> UDP ping pong 40 bytes
>
> Kernel Test 1 Test 2 Test 3 Test 4 Avg
> 2.6.22 83.1125 83.4 83.03 82.95 83.07
> 2.6.23 83.33 83.51 83.18 83.42 83.21
> 2.6.24 82.7775 82.8 82.77 82.77 82.77
> 2.6.25 85.875 85.94 85.75 86.06 85.75
> 2.6.26 87.4025 87.53 87.25 87.3 87.53
> 2.6.27 87.81 87.81 87.77 87.82 87.84
> 2.6.28 87.4275 87.77 87.24 87.28 87.42
> 2.6.29 88.4325 88.48 88.42 88.44 88.39
> 2.6.30-rc2 88.4925 88.49 88.44 88.56 88.48
You are using UDP, and UDP got memory accounting. This
next prev parent reply other threads:[~2009-04-18 8:19 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-16 16:10 Network latency regressions from 2.6.22 to 2.6.29 Christoph Lameter
2009-04-16 17:21 ` Rick Jones
2009-04-16 19:06 ` Christoph Lameter
2009-04-16 19:29 ` Eric Dumazet
2009-04-16 19:33 ` Christoph Lameter
2009-04-16 22:47 ` David Miller
2009-04-17 13:46 ` Christoph Lameter
2009-04-17 21:43 ` Ilpo Järvinen
2009-04-16 20:05 ` Rick Jones
2009-04-16 18:07 ` Ben Hutchings
2009-04-16 19:02 ` Christoph Lameter
2009-04-16 21:19 ` Ben Hutchings
2009-04-16 22:47 ` David Miller
2009-04-16 19:43 ` Eric Dumazet
2009-04-16 19:50 ` Eric Dumazet
2009-04-16 20:01 ` Christoph Lameter
2009-04-16 23:00 ` David Miller
2009-04-17 16:42 ` Network latency regressions from 2.6.22 to 2.6.29 (results with IRQ affinity) Christoph Lameter
2009-04-18 8:18 ` Eric Dumazet [this message]
2009-04-18 8:20 ` Eric Dumazet
2009-04-18 19:43 ` Eric Dumazet
2009-04-20 17:29 ` Christoph Lameter
2009-04-20 17:57 ` Eric Dumazet
2009-04-20 18:13 ` Christoph Lameter
2009-04-20 18:46 ` Eric Dumazet
2009-04-20 19:16 ` Christoph Lameter
2009-04-20 20:07 ` Eric Dumazet
2009-04-20 21:14 ` Christoph Lameter
2009-04-20 21:52 ` Eric Dumazet
2009-04-21 14:00 ` Christoph Lameter
2009-04-21 19:36 ` Network latency regressions from 2.6.22 to 2.6.29 (MSI off) Christoph Lameter
2009-04-20 19:44 ` Network latency regressions from 2.6.22 to 2.6.29 (results with IRQ affinity) Evgeniy Polyakov
2009-04-16 19:55 ` Network latency regressions from 2.6.22 to 2.6.29 Christoph Lameter
2009-04-16 21:57 ` Michael Chan
2009-04-17 13:47 ` Christoph Lameter
2009-04-16 22:59 ` David Miller
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