Date: Sun, 30 Nov 2003 01:02:47 +0100 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: "Marc G. Fournier" <scrappy@hub.org> Cc: 'Kris Kennaway' <kris@obsecurity.org> Subject: Re: Corrected gettimeofday() test code Message-ID: <21272.1070150567@critter.freebsd.dk> In-Reply-To: Your message of "Sat, 29 Nov 2003 19:30:18 -0400." <20031129192903.U99096@ganymede.hub.org>
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In message <20031129192903.U99096@ganymede.hub.org>, "Marc G. Fournier" writes: >On Sat, 29 Nov 2003, Don Bowman wrote: > >> For this config (below), kern.timecounter.method=0 reproduces the >> problem, kern.timecounter.method=1 does not. > >Can anyone comment on what effect setting method to 1 has on the system? >Like, would one notice a degradation in performance? Setting it to 1 forces the timecounter to update every HZ. You can say that 0 was an optimization which it seems may not be safe on certain hardware combinations... -- 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.
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