Date: Thu, 14 Dec 2006 13:37:34 +0200 From: Andriy Gapon <avg@icyb.net.ua> To: Peter Wemm <peter@FreeBSD.org>, freebsd-arch@FreeBSD.org Subject: HZ of 1024 Message-ID: <4581377E.2090407@icyb.net.ua>
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Peter and all, I am playing with an idea of using RTC/IRQ8 instead of 8254 timer/IRQ0 to drive system hard clock. Due to the nature of RTC, if I got it correctly, I think I will have to use HZ of 1024 (or some reasonable divisor of it). I've accidentally noticed that 1024 was used as a default value of hz on amd64 systems for a while, but then it was changed to use 1000. I've read the cvs commit logs about some interference with stat clock and/or prof clock, but I couldn't dig up any detailed information about this. Could you please share your experience about hz=1024 and advise what I should look for ? Maybe you even have some ideas on how to eliminate or reduce the interference ? Thank you. -- Andriy Gapon
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