Date: Tue, 4 Jul 2006 07:47:56 GMT From: Artem Bokhan <art@academ.org> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/99765: drifting time, SuperMicro PDSMi Motherboard, "calcru negative runtime" problems Message-ID: <200607040747.k647luAm028500@www.freebsd.org> Resent-Message-ID: <200607040750.k647oGfe072219@freefall.freebsd.org>
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>Number: 99765 >Category: kern >Synopsis: drifting time, SuperMicro PDSMi Motherboard, "calcru negative runtime" problems >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: Tue Jul 04 07:50:15 GMT 2006 >Closed-Date: >Last-Modified: >Originator: Artem Bokhan >Release: FreeBSD 6.1-STABLE i386 >Organization: >Environment: FreeBSD 6.1-STABLE FreeBSD 6.1-STABLE #1: Tue Jul 4 13:33:29 NOVST 2006 form@:/usr/obj/usr/src/sys/GENERIC i386 >Description: On SuperMicro SuperServer 5015M-MF with Super PDSMi Motherboard I have problems with drifting (several seconds for several minutes) time on all types of timecounters (TSC,ACPI-safe,i8254) in SMP and non-SMP modes, with acpi enabled and disabled. Also, with ACPI-safe timecounter there are a lot of messages like: Jul 4 14:37:34 kernel: calcru: negative runtime of -7736790 usec for pid 12 (swi4: clock sio) Jul 4 14:37:34 kernel: calcru: negative runtime of -509284 usec for pid 516 (sshd) Jul 4 14:37:34 kernel: calcru: negative runtime of -624737 usec for pid 421 (ntpd) Jul 4 14:37:34 kernel: calcru: negative runtime of -1315926 usec for pid 44 (softdepflush) Jul 4 14:37:34 kernel: calcru: negative runtime of -1018507 usec for pid 32 (irq14: ata0) Jul 4 14:37:34 kernel: calcru: negative runtime of -1012373 usec for pid 21 (irq16: em0 uhci3) Jul 4 14:37:34 kernel: calcru: runtime went backwards from 516063 usec to 216547 usec for pid 3 (g_up) Jul 4 14:37:34 kernel: calcru: negative runtime of -7736785 usec for pid 12 (swi4: clock sio) Jul 4 14:37:34 kernel: calcru: negative runtime of -509284 usec for pid 516 (sshd) Jul 4 14:37:34 kernel: calcru: negative runtime of -624737 usec for pid 421 (ntpd) Jul 4 14:37:34 kernel: calcru: negative runtime of -1315926 usec for pid 44 (softdepflush) On FreeBSD 7-CURRENT everything is OK, no problems with clock with any of ACPI-safe, TSC or i8254 timecounters. ps. I can provide full access to the server, if somebody could resolve the problem. >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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