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Message-ID: <001601c651bd$d1774040$0201a8c0@oxy>
From: "OxY" <oxy@field.hu>
To: "Jin Guojun [VFFS]" <g_jin@lbl.gov>
References: <20060322071023.70808.qmail@web30305.mail.mud.yahoo.com>	<442187FE.3060300@lbl.gov>
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Date: Mon, 27 Mar 2006 18:45:12 +0200
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Cc: Lucas Holt <luke@foolishgames.com>,
	FreeBSD Mailing Lists <freebsd-performance@freebsd.org>,
	Arne Woerner <arne_woerner@yahoo.com>
Subject: Re: packet drop with intel gigabit / marwell gigabit
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i decided to give up, can't get rid of packet loss...
thank you all for your help!

----- Original Message ----- 
From: "Jin Guojun [VFFS]" <g_jin@lbl.gov>
To: "OxY" <oxy@field.hu>
Cc: "Lucas Holt" <luke@foolishgames.com>; "FreeBSD Mailing Lists" 
<freebsd-performance@freebsd.org>; "Arne Woerner" <arne_woerner@yahoo.com>
Sent: Monday, March 27, 2006 5:51 AM
Subject: Re: packet drop with intel gigabit / marwell gigabit


> OxY wrote:
>
>> what kind of details should i attach? to analyze the problem?
>
> Assume that you have process A to cause process B dropping packets:
>
> Step (1):
> Run B only -- what is the maximum through without packet drop?
>                   what is the CPU utilization?
>                   what type of traffic (protocol -- TCP, UDP, etc.) does B 
> use?
>                   does B have other I/O? If so, how much is the I/O 
> bandwidth used?
>
> Step (2):
> reRun B and involving A gradually (increasing A's wieght) till B drops 
> packets.
>    provide all above statistics for A and B at this point (where drop 
> starts).
>
> One thing I missed in your original post what protocol drops packet -- 
> TCP or UDP?
>
>    -Jin