Date: Thu, 25 May 2000 09:30:05 -0700 From: Mike Smith <msmith@freebsd.org> To: "Jordan K. Hubbard" <jkh@zippy.cdrom.com> Cc: arch@FreeBSD.ORG Subject: Re: Preemptive kernel on older X86 hardware Message-ID: <200005251630.JAA02002@mass.cdrom.com> In-Reply-To: Your message of "Thu, 25 May 2000 01:31:23 PDT." <82645.959243483@localhost>
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> > On intel anyway, subroutine calls are *cheap*, especially compared > > to the overhead of a locked instruction or even an L1 cache miss. > > I don't believe this is true on all the architectures FreeBSD is > anticipated to run on in the "near future", however. The point that you may be missing is that we only need care about this on platforms where we need to conditionalise the mutex implementation. -- \\ Give a man a fish, and you feed him for a day. \\ Mike Smith \\ Tell him he should learn how to fish himself, \\ msmith@freebsd.org \\ and he'll hate you for a lifetime. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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