Re: Network slowdown on lo0 introduced with svn186119/186121

Hi Qing!

Did you have some time to look at this problem?

Thanks,
Christian.

On Sunday 28 December 2008, Li, Qing wrote:
> I'll investigate and get back to you ...
>
> -- Qing
>
>
> -----Original Message-----
> From: Christian Gusenbauer <c47g_at_gmx.at>
> Sent: Sunday, December 28, 2008 2:04 PM
> To: Kip Macy <kmacy_at_freebsd.org>
> Cc: Li, Qing <qing.li_at_bluecoat.com>; freebsd-current_at_freebsd.org
> <freebsd-current_at_freebsd.org>; qingli_at_freebsd.org <qingli_at_freebsd.org>
> Subject: Re: Network slowdown on lo0 introduced with svn186119/186121
>
> Hi Kip!
>
> Hmmm, I thought amanda is using a localhost connection? But you're right.
> If I test connections using the 'discard' or 'echo' service with the IP
> address of my lan interface, I get this terrible throughput, too. Using the
> localhost address the throughput is *much* better!
>
> Thanks,
> Christian.
>
> On Sunday 28 December 2008, Kip Macy wrote:
> > This problem can reproduced with netperf. 127.0.0.1 will give good
> > throughput, but using the IP address of one of the interfaces gives
> > terrible throughput.
> >
> > -Kip
> >
> > On Sun, Dec 28, 2008 at 12:50 PM, Li, Qing <qing.li_at_bluecoat.com> wrote:
> > > Hi Christian,
> > >
> > > Is the loopback address or an address that is assigned to
> > > an interface used by amanda? Would it be possible for you
> > > to give me some information on the tests you performed and
> > > on your method of measurement?
> > >
> > > Thanks,
> > >
> > > -- Qing
> > >
> > > ________________________________
> > >
> > > From: owner-freebsd-current_at_freebsd.org on behalf of Christian
> > > Gusenbauer Sent: Sun 12/28/2008 9:56 AM
> > > To: freebsd-current_at_freebsd.org
> > > Subject: Network slowdown on lo0 introduced with svn186119/186121
> > >
> > >
> > >
> > > Hi!
> > >
> > > Today I built a new kernel on current and experienced a massive network
> > > slowdown on lo0 when doing a backup using amanda. I made some tests and
> > > it seems that the commits 186119 and 186121 to the svn repository are
> > > causing it. A kernel based on revision 186107 runs fine and all kernels
> > > starting with revison 186119 do not.
> > >
> > > This slowdown seems to appear only on the loopback interface, not on my
> > > lan interface.
> > >
> > > Is this a known issue?
> > >
> > > Regards,
> > > Christian.
> > > _______________________________________________
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> > >
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