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Date:      Mon, 13 Nov 2006 17:50:36 -0700
From:      Scott Long <scottl@samsco.org>
To:        Mike Tancsa <mike@sentex.net>
Cc:        freebsd-net@freebsd.org, freebsd-stable@freebsd.org, Ivan Voras <ivoras@fer.hr>
Subject:   Re: Proposed 6.2 em RELEASE patch
Message-ID:  <455912DC.1020101@samsco.org>
In-Reply-To: <200611132222.kADMM8er046074@lava.sentex.ca>
References:  <2a41acea0611081719h31be096eu614d2f2325aff511@mail.gmail.com>	<200611091536.kA9FaltD018819@lava.sentex.ca>	<45534E76.6020906@samsco.org>	<200611092200.kA9M0q1E020473@lava.sentex.ca>	<200611102004.kAAK4iO9027778@lava.sentex.ca>	<2a41acea0611101400w5b8cef40ob84ed6de181f3e2c@mail.gmail.com>	<200611102221.kAAML6ol028630@lava.sentex.ca>	<455570D8.6070000@samsco.org>	<200611120412.kAC4CuIB035746@lava.sentex.ca>	<45574ECA.4080207@samsco.org>	<200611130040.kAD0etbp040637@lava.sentex.ca>	<4557CECD.2000609@samsco.org>	<200611130158.kAD1wdKE040908@lava.sentex.ca>	<4557EF13.9060305@samsco.org>	<200611130454.kAD4sZwe041556@lava.sentex.ca>	<4557FF7A.8020704@samsco.org>	<200611131248.kADCmieP043730@lava.sentex.ca>	<ejab8p$tgp$1@sea.gmane.org> <200611132222.kADMM8er046074@lava.sentex.ca>

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Mike Tancsa wrote:
> At 12:50 PM 11/13/2006, Ivan Voras wrote:
>> Mike Tancsa wrote:
>> > At 12:15 AM 11/13/2006, Scott Long wrote:
>> >
>> >> Is this with EM_INTR_FAST enabled also?
>> >
>> > Yes.  Havent done the stock case yet, but will do so later today.
>>
>> Do you have a comparison with Linux under the same circumstances?
> 
> I had a disk with 64bit already installed. I will try with 32bit 
> tomorrow.  I can also try FreeBSD AMD64 on the box to see how it does.
> 
> ifstat gives a bit of an odd output, but its the same sort of pattern 
> where adding a second stream in the same direction, slows down the first 
> one.  On the box R2
...
> 
> The box is totally responsive throughout with no packet loss on the 
> management interface.... However, it seems quite a bit slower than 
> FreeBSD when its tweaked with ADAPTIVE_GIANT removed... But again, this 
> is 64bit so not quite apples to apples yet.  Also, I need to check the 
> default driver config to see if their NAPI or whatever its called is 
> enabled.  More tests to come.
> 
>         ---Mike

More excellent data, thanks.  I have some changes on the drawing board
that should significantly improve forwarding and bridging in the em
driver.  Do you have a limit on how much more time you can spend on
these tests?  It might be a week or more before I have anything that can
be tested.

Scott



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