Router take advantage of device polling
T. Srikanth
kantsg at netscape.net
Thu May 27 03:26:08 PDT 2004
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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