Date: Wed, 20 Oct 2004 15:08:26 +0300 From: "Oleg Gawriloff" <barzog@telecom.by> To: <freebsd-performance@freebsd.org> Subject: decreasing interrupt CPU load Message-ID: <004001c4b69d$80e21f40$0c0210ac@ADMIN1>
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Hello! Currently we have router on FreeBSD 4.10-R on SMP 2*PIII 1Ghz. 5sec average traffic trhough fxp on Intel 82550 is about 12kpps (26Mbit/sec). CPU Load on interrupts shown in top and systat -v 1 always above 40%. We've tried to enable polling with HZ=1000, but cpu load does not change, instead round trip time increased from 1ms to 20ms. Also we've tried link0, no success. Is any other options to decrease interrupt cpu load? May be enabling fast forwarding, change fxp to em or bge NIC? Is there exist any drawbacks from enabling fast forwarding? With best regards, Oleg Gawriloff.
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