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Date:      Mon, 12 Nov 2001 22:15:59 +0100
From:      Trond Davidsen <trond.davidsen@ii.uib.no>
To:        Archie Cobbs <archie@dellroad.org>
Cc:        freebsd-net@FreeBSD.ORG
Subject:   Re: Mpd with a large number, 200+ , of bundles
Message-ID:  <3BF03C0F.9080704@ii.uib.no>
References:  <200111031831.fA3IVl424031@arch20m.dellroad.org>

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Hi,
just an update.  I've been debugging a little more and found that mpd 
hangs hard,top shows mpd's state as 'piperd',  when it got over 128 
sockets open.  This sounds like some kind of system limit to me, any 
ideas anyone?

I've enbled the '#define DEBUG_EVENT' in the file 'event.c' in the mpd 
source, and got the following in the log:

After mpd has set up all the (200) bundles:

Nov 12 21:57:26 vpn-gw3 mpd: [pptp190] EVENT: ACTIVE EVENTS:
Nov 12 21:57:26 vpn-gw3 mpd: [pptp190] EVENT:  -> 0x08079500 Read(13) 
REF 150095121 @ 0x80794f0
Nov 12 21:57:26 vpn-gw3 mpd: [pptp190] EVENT:  -> 0x08079780 Read(23) 
REF 150095126 @ 0x8079770
Nov 12 21:57:26 vpn-gw3 mpd: [pptp190] EVENT:  -> 0x08079980 Read(31) 
REF 150095131 @ 0x8079970


[snip]


Nov 12 21:57:26 vpn-gw3 mpd: [pptp190] EVENT: DOING ACTIONS:
Nov 12 21:57:26 vpn-gw3 mpd: [pptp190] EVENT: Doing action for Read(13) 
REF 150095121 @ 0x80794f0


After a little debugging with gdb, I found that these events are 
registered at line 299 and 301 in the function NgFuncInit in the file 
ngfunc.c.

Does this give any clue as to where the fault or limit might be located?

Trond




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