Date: Wed, 5 Nov 2008 16:40:32 +0300 From: pluknet <pluknet@gmail.com> To: "FreeBSD Net" <freebsd-net@freebsd.org> Subject: CARP performance tuning question. Message-ID: <a31046fc0811050540o527d315dvef1b35142f5caa29@mail.gmail.com>
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Hi. AT work we use device carp(4) under high load: The problem is that the server experiences a bad interactivity (from 70k states and very bad from 120-150k) i.e. when a network workload (and interrupts count) begin to increase. >From top(1): CPU states: 0.0% user, 0.0% nice, 0.4% system, 76.3% interrupt, 23.3% idle PID USERNAME THR PRI NICE SIZE RES STATE TIME WCPU COMMAND 13 root 1 -44 -163 0K 8K WAIT 407:43 57.86% swi1: net ATM pfctl -s info shows such numbers: State Table Total Rate current entries 153972 searches 6052078938 4800.8/s inserts 120373545 95.5/s removals 120219573 95.4/s It works currently under UP, but could be rebuilt to work under SMP (Xeon 5130) if that helps. Can someone give hints to decrease interrupt count and to help with the server stability at all? Thanks. -- wbr, pluknet
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