Date: Wed, 22 Mar 2006 22:18:44 +0100 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Luigi Rizzo <rizzo@icir.org> Cc: current@freebsd.org Subject: Re: interesting(?) data on network interrupt servicing Message-ID: <11680.1143062324@critter.freebsd.dk> In-Reply-To: Your message of "Wed, 22 Mar 2006 13:14:48 PST." <20060322131448.A42341@xorpc.icir.org>
next in thread | previous in thread | raw e-mail | index | archive | help
In message <20060322131448.A42341@xorpc.icir.org>, Luigi Rizzo writes: >> > if (thread) >> > isrc->is_pic->pic_disable_source(isrc, PIC_EOI); >> > >> >I have no idea, though, why the other pic_disable_source() >> >is so expensive. The 4-5k TSC ticks are approx 3us >> > >> >Any clues ? >> >> ISA bus access. > >yeah but this is a modern laptop with an apic, >not an 8259... i don't think it has any ISA bus unless there is >some strange emulation going on ? There is, how else would it boot MS-DOS ? -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?11680.1143062324>