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Date:      Sat, 05 Aug 2000 13:21:47 -0400
From:      Dennis <dennis@etinc.com>
To:        hackers@freebsd.org
Subject:   FreeBSD belly up with big config
Message-ID:  <200008051708.NAA00486@etinc.com>

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With 1800 interfaces in the system Freebsd seems to use about 50Mhz of cpu
when idle in "interrupts" even when there are no interrupts to process. on
a 500Mhz box it uses 10% of the cpu and it seems linear with different
speed processors.

the 1800 interfaces are 900 DLCIs on a T3 frame with 900 bridge groups
(rather common for a DSL delivered via Frame). This with just one
line...the same problem could occur with say 8 T1 lines with 100+ DLCIs on
each.

It seems that there is substantial overhead just scanning interfaces for
some routine maintenance...is there any hope of alleviating this deboggle?

Dennis


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