Date: Fri, 19 Apr 1996 08:17:57 +0000 From: Poul-Henning Kamp <phk@critter.tfs.com> To: Bruce Evans <bde@zeta.org.au> Cc: davidg@Root.COM, CVS-committers@freefall.freebsd.org, cvs-all@freefall.freebsd.org, cvs-sys@freefall.freebsd.org, phk@freefall.freebsd.org Subject: Re: cvs commit: src/sys/i386/i386 swtch.s vm_machdep.c src/sys/i386/include pcb.h src/sys/i386/isa wd.c Message-ID: <29609.829901877@critter.tfs.com> In-Reply-To: Your message of "Fri, 19 Apr 1996 18:05:41 %2B1000." <199604190805.SAA08335@godzilla.zeta.org.au>
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> >We save about 6 clock cycles in cpu_switch but not caring about %eax :-) > > It should save only 1 cycle on a 486 and 0.5 or 1 cycles on a Pentium :-). > Even if the value has to be loaded from memory, it should be in a cache Remeber that you will have to save it as well... No matter how many, you would have wasted those cycles anyway.. -- Poul-Henning Kamp | phk@FreeBSD.ORG FreeBSD Core-team. http://www.freebsd.org/~phk | phk@login.dknet.dk Private mailbox. whois: [PHK] | phk@ref.tfs.com TRW Financial Systems, Inc. Future will arrive by its own means, progress not so.
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