Date: Mon, 12 Jan 2004 00:00:42 +0200 From: Petri Helenius <pete@he.iki.fi> To: Bruce M Simpson <bms@spc.org> Cc: Richard Bejtlich <richard_bejtlich@yahoo.com> Subject: Re: Paper on device polling and packet capture performance Message-ID: <4001C78A.3060904@he.iki.fi> In-Reply-To: <20040111195740.GK17555@saboteur.dek.spc.org> References: <20040109171717.33976.qmail@web60804.mail.yahoo.com> <FPEBKMIFGFHCGLLKBLMMEEIKCDAA.ghelmer@palisadesys.com> <20040111195740.GK17555@saboteur.dek.spc.org>
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Bruce M Simpson wrote: > I'd be happy to review other patches for this. My personal feeling though > >is that the actual performance increase may not be that great, but it's >a case of someone implementing it and doing the math. > > > Writing to memory, specially on SMP systems, is very expensive. So eliminating copies will give huge performance benefits. Where bpf can go hardly 500Mbps on dual CPU machine, memory mapped capture will reach 1.5-2.0Gbps. Pete
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