>Number: 155238 >Category: kern >Synopsis: 20 minute time jumps in VirtualBox >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Mar 03 20:30:08 UTC 2011 >Closed-Date: >Last-Modified: >Originator: Martin Birgmeier >Release: 8.2, HEAD >Organization: MBi at home >Environment: FreeBSD v902.xyzzy 8.2-RELEASE FreeBSD 8.2-RELEASE #1: Sun Feb 20 19:23:23 CET 2011 root@v902.xyzzy:/.../hal/z/OBJ/FreeBSD/i386/RELENG_8_2_0_RELEASE/src/sys/XYZZY_SMP i386
FreeBSD v903.xyzzy 9.0-CURRENT FreeBSD 9.0-CURRENT #1: Sun Jan 30 13:12:33 CET 2011 root@v903.xyzzy:/usr/obj/.../hal/z/SRC/FreeBSD/HEAD/src/sys/XYZZY_SMP_NA amd64 >Description: I am running several versions of FreeBSD under VirtualBox, on a 4-core AMD box running FreeBSD 8.2 amd64. Since recently, and I believe since installing 8.2, every few minutes the time in the vbox clients jumps by exactly 20 minutes like this (hal is the host, the v90x are the vbox clients): [0]# rdate -p hal ; date Thu Mar 3 19:36:27 2011 Thu Mar 3 19:36:27 CET 2011 [0]# rdate -p hal ; date Thu Mar 3 19:44:06 2011 Thu Mar 3 19:44:06 CET 2011 [0]# rdate -p hal ; date Thu Mar 3 20:09:14 2011 Thu Mar 3 20:29:14 CET 2011 <=== jump by 20 minutes [0]# date ; rdate hal Thu Mar 3 20:29:16 CET 2011 <=== manual reset using rdate Thu Mar 3 20:09:16 2011 [0]# date ; rdate hal Thu Mar 3 20:43:58 CET 2011 Thu Mar 3 20:43:59 2011 or this: [0]# rdate -p hal ; date Thu Mar 3 20:57:44 2011 Thu Mar 3 20:57:43 CET 2011 [0]# rdate -p hal ; date Thu Mar 3 20:58:31 2011 Thu Mar 3 21:18:30 CET 2011 <=== jump [0]# date ; rdate hal Thu Mar 3 21:18:34 CET 2011 <=== manual reset Thu Mar 3 20:58:35 2011 [0]# rdate -p hal ; date Thu Mar 3 21:00:49 2011 Thu Mar 3 21:00:49 CET 2011 [0]# rdate -p hal ; date Thu Mar 3 21:05:31 2011 Thu Mar 3 21:25:31 CET 2011 <=== jump [0]# date ; rdate hal Thu Mar 3 21:25:37 CET 2011 <=== manual reset Thu Mar 3 21:05:37 2011 [0]# date ; rdate hal Thu Mar 3 21:08:12 CET 2011 Thu Mar 3 21:08:13 2011 This does not seem to happen on the 7.4 client which is also running at the same time as the two others (HEAD, 8.2). Previously (and I believe even now), if the host was very busy, the clients would simply lag behind the host, and I could use rdate to set them forward again. But these exact 20 minute jumps are a completely new experience and rather annoying. Btw., if I remember correctly, they also accumulate: If I do not manually reset the time, after a longer while I will have the clock 40 minutes into the future, etc. >How-To-Repeat: Run HEAD or 8.2 in VirtualBox, observe the time. >Fix: >Release-Note: >Audit-Trail: >Unformatted: _______________________________________________ freebsd-bugs@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-bugs To unsubscribe, send any mail to "freebsd-bugs-unsubscr...@freebsd.org"
