Date: Tue, 25 May 2004 11:32:08 -0700 From: Luigi Rizzo <rizzo@icir.org> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: Robert Watson <rwatson@freebsd.org> Subject: Re: Network Stack Locking Message-ID: <20040525113208.A74130@xorpc.icir.org> In-Reply-To: <200405251820.i4PIKnil093871@apollo.backplane.com>; from dillon@apollo.backplane.com on Tue, May 25, 2004 at 11:20:49AM -0700 References: <Pine.NEB.3.96L.1040524234219.98946L-100000@fledge.watson.org> <200405251820.i4PIKnil093871@apollo.backplane.com>
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On Tue, May 25, 2004 at 11:20:49AM -0700, Matthew Dillon wrote: ... > :Actually, this was the specific point I was making also :-). The question > :I was asking was about the depth of the message queues between protocol > :stack layers in actual measurements -- are you observing substantial > :coallescing between layers as a result of the queues at this point? I'm ... > It should also be noted that since today's processors are so damn fast, > actually maxing out the cpu before maxing out the PCI bus(es), at least > on a standard workstation, is difficult. that's where the soekris comes handy :) (yes i understand that much of the issues here are related to SMP, but there lot of evidence that a non-smp 5.x kernel is significantly slower than the equivalent 4.x code, even on heavy network i/o loads, so there is certainly something to clean up there too). cheers luigi
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