Date: Fri, 24 Jul 2015 09:50:10 -0700 From: Adrian Chadd <adrian.chadd@gmail.com> To: deco33000@yandex.com Cc: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: struct timehands: th_generation field Message-ID: <CAJ-VmokvtH4ZP8bw_MSXAfxf-=g8ANLoKS3=-VjMhALufsRDtA@mail.gmail.com> In-Reply-To: <1568531437753516@web15h.yandex.ru> References: <464641437658995@web16j.yandex.ru> <CAKFCL4Up=cW0mue-XXhnw%2Bu6KfTTSv8T4xzMr4%2B2p=Y4CoJ=rQ@mail.gmail.com> <190031437662308@web29g.yandex.ru> <CAKFCL4X3N91vgN%2BfjRAyeFFjtbb6_KDrCyDEgoWfuyULrrwwUQ@mail.gmail.com> <1437665319.1334.519.camel@freebsd.org> <1568531437753516@web15h.yandex.ru>
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accessing hardware isn't free. Locking also isn't free. That's why there's this mechanism. -adrian On 24 July 2015 at 08:58, <deco33000@yandex.com> wrote: > > OK. > > I read the document and understood it I guess. > Very interesting, and well engineered. > > On x86/i386/amd64, could not all this be replaced by a simple call to apic timer ? > We would get the timestamp, we can even store it, make calculation on top of it. > > My jugement may miss something important though. That is why I ask :) > > > -- > Jog > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"
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