performance tests conducted on 7.04, 7.10, 8.04, 8.10rc

[Daniel J Blueman]

On Mon, Oct 27, 2008 at 12:46 PM, Michael Larabel
<michael.larabel at phoronix.com> wrote:
> Jeff Schroeder wrote:
>>> From: Mirco M?ller <mirco.mueller at ubuntu.com>
>>> Subject: performance tests conducted on 7.04, 7.10, 8.04, 8.10rc
>>>
>>> Greetings everybody!
>>>
>>>        Phoronix ran performance tests on releases 7.04, 7.10, 8.04 and 8.10rc.
>>> 8.10 seems to be the worst performer of the quartet. Have a look at
>>> their summarizing article:
>>>
>>>        http://www.phoronix.com/scan.php?page=article&item=ubuntu_bench_2008&num=1
>>>
>>>        They are trying to be fair and point out possible causes for the
>>> slowdowns. While this has only been tested on a ThinkPad T60 their
>>> initial findings are nothing to write home about. Most influential are
>>> crucial parts like the kernel, gcc, Xorg, graphics-drivers.
>>>
>>> Time for alarm-bells to go off?
>>>
>>
>> Well from a networking standpoint, the Linux kernel has been doing
>> poorly as of late:
>> http://www.ioremap.net/node/37
>>
>> It looks like phoronix missed that aspect entirely :-/
>>
>>
> It's not that we avoided the network performance area but that there are
> no network test profiles currently written for the Phoronix Test Suite
> so that they could be conducted in an automated way. Though it shouldn't
> be too much of a problem to push a tbench profile in there so that it
> automatically gets picked up in the next round of tests.

It's worthwhile mentioning that the Reno TCP congestion control was in
use for all the Ubuntu distros until now...the upstream Linux kernel
changed to Cubic TCP two years ago, but this wasn't picked up until
two weeks ago [https://bugs.launchpad.net/bugs/278801], so TCP send
performance should have improved in particular cases. But, this hasn't
got the attention is deserves! (perhaps more relevant to ubuntu server
though).

TCP over wireless is a particularly interesting benchmark, or over 10G
ethernet...streaming over gigE is a snack in the park for any modern
systems, but content serving perhaps isn't.

Dan

> Michael
>>> Best regards ...
>>>
>>> Mirco
>>>
>>
>>
>
>
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-- 
Daniel J Blueman