Date: Thu, 27 May 2004 16:00:41 +0530 From: "T. Srikanth" <kantsg@netscape.net> To: freebsd-questions@freebsd.org Subject: Re: Router take advantage of device polling Message-ID: <40B5C351.802@netscape.net>
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Jeffrey, Yes, there is. At a certain level of traffic, network interrupts happen all too often to justify the processing overhead associated with the interrupt service routines, and hence the network activity is best polled. Is 15Mbps the level for enabling polling? Well, this traffic level depends on the underlying hardware capabilities as well. You decide. --Srikanth Jeffrey Lyon wrote: I am currently running a router pushing about 15 megabit of traffic, with CPU usage like so: root 25 5.9 0.0 0 12 ?? WL 10:16AM 47:49.70 (irq7: bge0 amr0) root 14 5.9 0.0 0 12 ?? WL 10:16AM 55:15.63 (swi1: net) root 26 3.0 0.0 0 12 ?? LL 10:16AM 28:42.81 (irq5: bge1) I am told that activating the device_polling kernel option will cause a substantial reduction in this usage. Is there any truth to that statement? Thanks. -- Jeffrey Lyon, Independent Associate jeffreylyon at prepaidlegal.com <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>; http://www.prepaidlegal.com/hub/jeffreylyon Pre-Paid Legal Services, Inc.
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