Date: Fri, 30 Sep 2005 13:47:36 +0100 (BST) From: Robert Watson <rwatson@FreeBSD.org> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: arch@FreeBSD.org, Gleb Smirnoff <glebius@FreeBSD.org>, net@FreeBSD.org Subject: Re: [REVIEW/TEST] polling(4) changes Message-ID: <20050930134526.R71864@fledge.watson.org> In-Reply-To: <32170.1128084231@critter.freebsd.dk> References: <32170.1128084231@critter.freebsd.dk>
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On Fri, 30 Sep 2005, Poul-Henning Kamp wrote: > I still think we should stop having this network-centric view of polling > and implement _real_ *device* polling, so that other device types can > use it as well. While I agree that we should offer polling to non-network device drivers also, I think it's worth observing that the network awareness of our current polling code has some interesting advantages. For one thing, the framework itself is aware of the notion of batching and moderating the workload as it is aware of the number of mbufs being processes, and knows to bound the workload, etc. We'll need to revisit many of the ideas in the current polling implementation (designed largely around 4.x operating assumptions) anyway, but I think it's important we understand some of the implicit design benefits that are present in the current system as well... Robert N M Watson
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