Date: Mon, 12 Mar 2001 23:45:00 +0200 From: Mark Murray <mark@grondar.za> To: Matt Dillon <dillon@earth.backplane.com> Cc: current@FreeBSD.ORG Subject: Re: Ethernet entropy harvesting seriously pessimizes performance Message-ID: <200103122144.f2CLi3f92042@gratis.grondar.za> In-Reply-To: <200103122103.f2CL3YZ74166@earth.backplane.com> ; from Matt Dillon <dillon@earth.backplane.com> "Mon, 12 Mar 2001 13:03:34 PST." References: <200103122103.f2CL3YZ74166@earth.backplane.com>
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> I don't understand what is so difficult about simply rate-limiting > the code at the proper point -- at the very beginning of the > call that the interrupt harvester makes, removing most of the fixed > overhead for the case where a system is getting a large number of > interrupts per second? Why are you going through loops to create > complex, sensitive code paths when a simple solution can be plopped > down and will work, SNAP, just like that? Because I need to make folks other than you happy. Lots of security minded people what _all_ the interrupt entropy they can get, and this method gives them that while allowing others to throttle the harvester back. M -- Mark Murray Warning: this .sig is umop ap!sdn To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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