Date: Wed, 09 Apr 2003 14:00:46 +0200 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: ticso@cicely.de Cc: hackers@freebsd.org Subject: Re: realtime problem Message-ID: <32990.1049889646@critter.freebsd.dk> In-Reply-To: Your message of "Wed, 09 Apr 2003 13:49:58 %2B0200." <20030409114957.GN83126@cicely9.cicely.de>
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In message <20030409114957.GN83126@cicely9.cicely.de>, Bernd Walter writes: >I need a realtime behavour in the (-current) kernel with 1ms >resolution and a presision of 500us. You are in trouble. >I thought about these two ways: >- use timeout(9), but it seems that on i386 we only have a > resolution of 10ms. > And I don't know of what presision quality I can expect. > Can the resolution changed to 1ms as we have on alpha? You can change this by changing the "hz" of the kernel. I belive this can be done from either the loader or the kernel config file. -- 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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