Date: Sat, 23 Sep 2006 21:53:18 -0500 From: Paul Schmehl <pauls@utdallas.edu> To: questions@freebsd.org Subject: Device polling - worthwhile? Message-ID: <188DD322AA361E26DFC311B9@paul-schmehls-powerbook59.local>
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--==========5DC5F6C85DA5260C78C4========== Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: quoted-printable Content-Disposition: inline I've been reading about device polling. I'm wondering if it's worth doing = on a busy website (4,000,000+ hits/month, 45GB+ bandwidth use). I=20 understand what polling is and how it queues traffic as opposed to the=20 "old-fashioned" interrupt method, but do you really gain performance-wise? = Are there any pitfalls to enabling it in the kernel? (I understand you=20 can enable/disable it using ifconfig.) Any gotchas regarding tuning?=20 (This is a production website. I don't want to cause problems that are=20 hard to figure out.) If it matters, I'm running 6.1 RELEASE, GENERIC kernel, Broadcomm GIG=20 NICs, 3.2GHz processor, 2GB of memory, apache 1.3.* Paul Schmehl (pauls@utdallas.edu) Adjunct Information Security Officer The University of Texas at Dallas http://www.utdallas.edu/ir/security/ --==========5DC5F6C85DA5260C78C4==========--
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