Date: Sun, 17 Feb 2002 12:39:13 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Poul-Henning Kamp <phk@critter.freebsd.dk> Cc: Terry Lambert <tlambert2@mindspring.com>, Julian Elischer <julian@elischer.org>, Alfred Perlstein <bright@mu.org>, arch@FreeBSD.ORG, jhb@FreeBSD.ORG, peter@wemm.org, jake@locore.ca Subject: Re: gettimeofday() and crhold()/crfree() (was Re: gettimeofday()and copyout(). Is copyout() MPSAFE on non-i386 archs? ) Message-ID: <200202172039.g1HKdDX91151@apollo.backplane.com> References: <6008.1013977727@critter.freebsd.dk>
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:with a special device driver). Provided that the process has acccess
:to reading the timecounter (== not i8254) all the time-calculations
:can be done in userland without any calls into the kernel.
:
:This was a design parameter for timecounters, I have just never
:gotten around to commit the stuff.
:
:It is an optimization which I think is not quite needed yet and I
:certainly have other things in my queue with higher priority right
:now.
:
:--
:Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
I think we can safely say that all of this is in the 'still arguing about
the design' stage.
-Matt
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