Re: mbuf leak with SMP and debug.mpsafenet=1

Robert Watson writes:
 > On Thu, 14 Oct 2004, Andrew Gallatin wrote:
 > 
 > > Log into another host and do:
 > > 
 > > % while 1
 > > while?  ssh  'netstat -m | grep mbufs'
 > > while?  netperf224 -Hscream -tUDP_STREAM -l60 -- -m 1 >& /dev/null
 > > while? end
 > 
 > I must have missed this e-mail previously, sorry about the slow response.
 > John Baldwin pointed me at it wondering why I hadn't answered, and that's
 > why :-).

Funny you should write now.  I noticed green's MFC of a fix for mbuf
leaks and was trying RELENG_5 from this morning.  Alas,  it does not
fix my problem.

 > Is the number of mbufs lost proportional to total run time since the
 > start, or number of runs since start?  I.e., if you shorten 60 seconds to
 > 6 seconds but sample at the same rate, what impact does that have on the
 > measured leakage?

I just tried that and it looks like the leakage stays rougly the same.
It seems to be roughly 100-150 mbufs/second with this setup.

I hooked up the em0 GbE interfaces, and that leaks nearly as bad as
my myrinet nic (at least with a linux sender, hooked back-to-back).
Em0 seems to be leaking at a few thoundsand pkts/sec, so I wasn't brave
enough to do a long run..


Drew