Date: Tue, 27 Dec 2011 23:04:23 -0800 From: Adrian Chadd <adrian@freebsd.org> To: Juli Mallett <jmallett@freebsd.org> Cc: Pawel Tyll <ptyll@nitronet.pl>, lev@freebsd.org, "Alexander V. Chernikov" <melifaro@freebsd.org>, freebsd-net@freebsd.org, freebsd-ipfw@freebsd.org, Luigi Rizzo <rizzo@iet.unipi.it> Subject: Re: Firewall Profiling. Message-ID: <CAJ-Vmokt34P6J5kkAO8_SHvxLefH71G2wBvQsbJAEOMPG3NTXA@mail.gmail.com> In-Reply-To: <CACVs6=99=xGhNVBgQhzmm8FFdSf7P-d5zKuyFRm8MMnhAjc-1Q@mail.gmail.com> References: <1498545030.20111227015431@nitronet.pl> <4EF9ADBC.8090402@FreeBSD.org> <623366116.20111227150047@nitronet.pl> <20111227142600.GA65456@onelab2.iet.unipi.it> <91777482.20111228102644@serebryakov.spb.ru> <CACVs6=99=xGhNVBgQhzmm8FFdSf7P-d5zKuyFRm8MMnhAjc-1Q@mail.gmail.com>
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On 27 December 2011 22:32, Juli Mallett <jmallett@freebsd.org> wrote: > Reloading of mbufs into DMA descriptors? =A0mbuf allocator overhead > itself? =A0Interrupts. =A0Context switches under constant heavy load. > Some indirection in the network stack. Keeping caches primed? Not doing lots of very-deep-stack stuff for each packet, which is the bane of all current kernel-space UNIX implementations of frame forwarding? :) Adrian
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