kern/152828: [em] poor performance on 8.1, 8.2-PRE

[Michael W. Lucas]

Hi,

I'm not seeing a complete stall, just very slow performance.

I have two hosts on a shared gigabit Ethernet. One is OpenSolaris, the
other FreeBSD.  My SCP from the Opensolaris box to the FreeBSD one
goes at:

653 MB    00:29

The FreeBSD machine is an Intel SS4200-E.

I have a second environment, identical except they're on a 100Mb
switch rather than gigabit.  Very similar throughput.

Any suggestions appreciated.

Thanks,
==ml

On Wed, Jul 20, 2011 at 06:31:17PM +0100, Steven Hartland wrote:
> It stalls on just a basic file scp. Our current test is to scp the freebsd
> iso to the machine. It won't always do it but it does "seem" like once its 
> had
> one stall its very much more prone to repeat stalls.
> 
> Here are some examples of what we see:-
> 
> FreeBSD-8.2-RELEASE-amd64-disc1.iso        41%  284MB   0.3KB/s - stalled 
> -Read from remote host test01: Operation timed out
> lost connection
> 
> 
> world-2011-05-15-09-53-16.tar.gz           100%   67MB   3.4MB/s   00:20    
> world-2011-05-30-07-35-37.tar.gz           100%   68MB   5.7MB/s   00:12    
> world-2011-05-05-23-51-00.tar.gz           100%   50MB   3.6MB/s   00:14    
> world-2011-06-06-14-20-09.tar.gz           100%   81MB   3.7MB/s   00:22    
> world-2011-06-15-09-10-42.tar.gz            44%   61MB  41.5KB/s - stalled 
> -^world-2011-06-15-09-10-42.tar.gz
> Failed to restore server, aborting!
> Write failed: Broken pipe
> 
>    Regards
>    Steve
> 
> ----- Original Message ----- 
> From: "Jack Vogel" <jfvogel at gmail.com>
> To: "Steven Hartland" <killing at multiplay.co.uk>
> Cc: <freebsd-net at freebsd.org>; "Michael W. Lucas" 
> <mwlucas at blackhelicopters.org>
> Sent: Wednesday, July 20, 2011 6:18 PM
> Subject: Re: kern/152828: [em] poor performance on 8.1, 8.2-PRE
> 
> 
> >Can you formulate a scenario that anyone else can setup and reproduce this?
> >
> >Jack
> >
> >
> >On Wed, Jul 20, 2011 at 10:13 AM, Steven Hartland
> ><killing at multiplay.co.uk>wrote:
> >
> >>**
> >>Yep, it stalls 8.2 partners as well :(
> >>
> >>----- Original Message -----
> >>*From:* Jack Vogel <jfvogel at gmail.com>
> >>*To:* Steven Hartland <killing at multiplay.co.uk>
> >>*Cc:* Michael W. Lucas <mwlucas at blackhelicopters.org> ;
> >>freebsd-net at freebsd.org
> >>*Sent:* Wednesday, July 20, 2011 6:03 PM
> >>*Subject:* Re: kern/152828: [em] poor performance on 8.1, 8.2-PRE
> >>
> >>Did you eliminate that 7.0 box as part of the issue? Meaning switch to say
> >>a Linux
> >>or 8.2 partner to see if the problem persists or stops?
> >>
> >>
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-- 
Michael W. Lucas 	
http://www.MichaelWLucas.com/, http://blather.MichaelWLucas.com/
Latest book: Network Flow Analysis http://www.networkflowanalysis.com/
mwlucas at BlackHelicopters.org, Twitter @mwlauthor