packet drop with intel gigabit / marwell gigabit
oxy at field.hu
Sat Mar 25 17:21:44 UTC 2006
what kind of details should i attach? to analyze the problem?
----- Original Message -----
From: "Jin Guojun [VFFS]" <g_jin at lbl.gov>
To: "Lucas Holt" <luke at foolishgames.com>
Cc: "OxY" <oxy at field.hu>; "FreeBSD Mailing Lists"
<freebsd-performance at freebsd.org>; "Arne Woerner" <arne_woerner at yahoo.com>
Sent: Friday, March 24, 2006 9:09 PM
Subject: Re: packet drop with intel gigabit / marwell gigabit
> Lucas Holt wrote:
>> On Mar 24, 2006, at 8:12 AM, OxY wrote:
>>> hi guys!
>>> well, i changed my motherboard and CPU from the
>>> asus a7v8x+amd 2000+ xp to
>>> the abit be7 + p4 2.4 (533fsb) and the packet loss fell down from 8%
>>> to 2%, but
>>> still have loss...
>>> loss coming when i have load.. i guess it decreased because of the
>>> bigger resources.
>>> still waiting for tipps, hints, everything :)
>> I don't think you'll ever get down to 0% in your situation. I noticed
>> in the initial post that you have net.inet.tcp.inflight.enable=1 set.
>> On my home network, turning that off helped a great deal with samba
>> traffic to my freebsd file server/ router. It didn't seem to affect
>> traffic to my webserver much, but its very low traffic. The problem
>> with tuning on other people's settings is that each workload is
>> different though.
> Especially, when a user did not mention what network traffic condition and
> system load
> cause packet loss, it is difficult to get insight of the problem. So, the
> other thing in getting
> help in troubleshooting and performance tuning is to provide systematic
> and more detailed
>> There might not be a miracle hack to get this working how you want. I'm
>> sure the new box is a bit better as I attempted some of the steps
>> outlined by Jin on my two machines. (amd 2300+ w/ msi nforce2 512mb ram
>> and P4 2.4ghz 1gb ram 533mhz fsb) The P4 system was faster on all my
>> tests by quite a large margin.
> Just curious, were all your tests I/O related? 2300+ should over perform
> P4 2.4GHz in some
> computation tasks.
>> I must admit, I didn't follow all of Jin's calculations.
> I had quite sloppy email since I did not intend to involve detailed
> hardware discussion, but...
> For example, when I said that "cache design affects memory bandwidth [x1]"
> is very vague.
> It really means: "cache design affects memory copy speed (except DMA)."
> Generally, if we talk access data between CPU and main memory, then
> technically [x1] is right.
> If we talk to entire system design, theoretically, [x1] is wrong.
> I stand corrected for all such writing.
More information about the freebsd-performance