Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!think!harvard!cmcl2!seismo!umcp-cs!chris
From: chris@umcp-cs.UUCP (Chris Torek)
Newsgroups: net.unix-wizards
Subject: Re: busy looping in kernel, time question
Message-ID: <994@umcp-cs.UUCP>
Date: Thu, 17-Apr-86 14:58:33 EST
Article-I.D.: umcp-cs.994
Posted: Thu Apr 17 14:58:33 1986
Date-Received: Sat, 19-Apr-86 14:17:40 EST
References: <234@Shasta.ARPA>
Reply-To: chris@maryland.UUCP (Chris Torek)
Organization: University of Maryland, Dept. of Computer Sci.
Lines: 14

In article <234@Shasta.ARPA> alex@lancelot writes:
>	Assume I want to busy loop in the kernel for 100 milliseconds, how
>many times (approx) should I go around a loop which increments an int?

In a 4BSD kernel, use the `DELAY' macro.  DELAY(n) takes approximately
n microseconds to complete:

	DELAY(100000);	/* 100 ms */

The actual delay is *very* approximate.
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 1415)
UUCP:	seismo!umcp-cs!chris
CSNet:	chris@umcp-cs		ARPA:	chris@mimsy.umd.edu