137

Unix/Linux 网络时间协议版本3 Network Time Protocol Version 3 (NTP) distribution for Unix systems

Received: from kalman.apl.washington.edu by huey.udel.edu id aa04033;
          1 May 97 16:37 EDT
Received: from kalman.apl.washington.edu (localhost [127.0.0.1])
          by kalman.apl.washington.edu (8.8.4/8.8.4) with ESMTP
	  id NAA31909 for <[e-mail]>; Thu, 1 May 1997 13:39:37 -0700
Message-Id: <[e-mail]>
To: [e-mail]
Subject: Re: xntpd patch. 
In-reply-to: Your message of "Thu, 01 May 1997 14:47:00 EDT."
             <[e-mail]> 
Date: Thu, 01 May 1997 13:39:36 -0700
From: Jeff Dairiki <[e-mail]>

Dave,

Well, if you didn't like the last patch, here's another!
From inspecting kernel source (Linux 2.0.29 and 1.2.13) it appears that
tickadj = 500/HZ usec, allowing for 500ppm freq correction.
(HZ = 100, for pc-linux (intel), but I believe it is different
on other architectures.)

Apparently, ntp_unixclock:clock_parms() reports an erroneously
low value of 1 usec.  Man, don't take it personally, but that
code is a mess!

It looks like PRESET_TICKADJ is incorrectly set to 1 by configure.

Here's my guess at a patch.  Be warned that I haven't tested it.
At your request, I will test it though.

(Distribution: xntp3-5.90; config.guess: i586-pc-linux-gnu)

--- configure.in.orig   Thu May  1 13:13:37 1997
+++ configure.in        Thu May  1 13:22:18 1997
@@ -1922,7 +1922,7 @@
       ans=150
       ;;
    *-*-linux*)
-      ans=1
+      ans='500/hz'
       ;;
    *-*-sco3.2v4*)
       ans=1000000L/hz


Jeff

PS Is there a newer version of xntp which I should be using?