From owner-freebsd-hackers Thu Oct 29 10:41:48 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id KAA00823 for freebsd-hackers-outgoing; Thu, 29 Oct 1998 10:41:48 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from scully.tamu.edu (unix.tamu.edu [128.194.103.31]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id KAA00814 for ; Thu, 29 Oct 1998 10:41:42 -0800 (PST) (envelope-from s0k9955@unix.tamu.edu) Received: from localhost by scully.tamu.edu (8.9.0/8.9.0) with SMTP id MAA29235; Thu, 29 Oct 1998 12:41:31 -0600 (CST) Date: Thu, 29 Oct 1998 12:41:31 -0600 (CST) From: Shafia Kausar To: FreeBSD Hackers cc: shafiak@ee.tamu.edu Subject: Timer Granularity Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Hi, I am new to the FreeBSD OS. I have a few questions for which I could not find answers on the webpages. I am using the FreeBSD version 2.1.5 Relase #2. What is the kernel clock granularity in this version? There are a number of clocks being used in FreeBSD. Which clock is used for real time kernel processing? Is this accessible to the users? Has the timer granularity improved in the releases following this release? In the /sys/kern/kern_clock.c file the variable time_precision has been initialised to 1microsec, but it has been stated that the resolution decreases depending on whether the external clock is working or not. What is the range of the variation in the resolutuion? Any help or pointers are welcome. Thanks -Shafia To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message