Date: 09 Aug 2001 12:22:14 +0100 From: Rolf Neugebauer <neugebar@dcs.gla.ac.uk> To: Jeff Behl <jeff@expertcity.com> Cc: "'freebsd-hackers@freebsd.org'" <freebsd-hackers@FreeBSD.ORG> Subject: Re: timing question Message-ID: <ysq66bxcwbd.fsf@therese.dcs.gla.ac.uk> In-Reply-To: Jeff Behl's message of "Wed, 8 Aug 2001 10:21:20 -0700" References: <0307F3737A2AD511A42200D0B7A071919A4043@dopey.corp.expertcity.com>
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Jeff Behl <jeff@expertcity.com> writes: > thanks to all for the help with the timing question. Increasing the hz to > 400 (in param.c) allowed for granularity of 5ms, which is what we needed. > For those as unknowing as I was about unix timing, I ran across the > following url which explained why a setting of 400hz allows for a max > resolution of twice the tick amount (2.5ms).: > http://www.ripe.net/ripencc/mem-services/ttm/Notes/PAM2001/node6.html#SECTIO > N00061000000000000000 You don't need to modify param.c. Just add options HZ=400 # increase timer frequency to your kernel config file. Rolf To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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