From: Xavier Leroy <xavier.leroy@inria.fr>
To: Nick Name <nick.name@inwind.it>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] Thread.delay, Unix.select, Unix.gettimeofday, Sys.time together?
Date: Mon, 9 Jun 2003 18:19:08 +0200 [thread overview]
Message-ID: <20030609181908.C22874@pauillac.inria.fr> (raw)
In-Reply-To: <20030607141702.28d583c6.nick.name@inwind.it>; from nick.name@inwind.it on Sat, Jun 07, 2003 at 02:17:02PM +0200
> If I put the delay into the cycle, I can't get less than 1/100 of second
> delay, on any machine I do this test. Is there a portable function that
> can do a shorter delay, say 1/1000 of second ad least?
Not in a portable way, I'm afraid. Most Unix kernels round delays up
to the next clock tick, and use clocks of 50, 60 or 100 Hz.
Linux/Alpha is an exception, with a 1000 Hz (or 1024?) clock.
Under Linux, you could use Unix.select() on /dev/rtc. This device can be
programmed to generate ticks with a frequency between 1 Hz and 8192 Hz
in powers of 2. Check Documentation/rtc.txt in the Linux source tree
for more details.
- Xavier Leroy
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prev parent reply other threads:[~2003-06-09 16:19 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-07 12:17 Nick Name
2003-06-07 13:31 ` Nicolas George
2003-06-09 16:19 ` Xavier Leroy [this message]
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