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Date:      Wed, 14 Jan 2009 10:28:55 -0500
From:      Mikel King <mikel.king@olivent.com>
To:        scuba@centroin.com.br
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Time skew 
Message-ID:  <6334D90C-2288-41CF-8384-3E513B739BE6@olivent.com>
In-Reply-To: <alpine.BSF.2.00.0901141112490.41980@trex.centroin.com.br>
References:  <alpine.BSF.2.00.0901141112490.41980@trex.centroin.com.br>

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Marcelo,

	Try adding either,

			hint.apic.0.disabled=1
or
			kern.hz="100"

to /boot/loader.conf

Reboot the machine and check your time.

The first line is the patch originally noted in the VMWare KB the  
latter is from the FreeBSD handbook on the subject.

Regards,
Mikel

On Jan 14, 2009, at 9:09 AM, scuba@centroin.com.br wrote:

> Hi All,
>
> 	I'm facing some strange behavior with an skew in the system clock.
> 	The hardware is a Dell PowerEdge 2950III, running two instances of  
> FreeBSD 7.0-RELEASE-p5 - amd64 over an ESXi hipervisor.
> 	To both were allocated 4 processors and 4 GB of RAM, and dmesg for  
> both are identical.
> 	I'm using clockspeed to synchronize the clock, but just one of them  
> is delaying the clock a lot.
> 	The hardware clock is ok as far as the other virtual machine.
> 	Where should I start to investigate?
>
> - Marcelo
>
> 	Dmesg is following:
>
> Copyright (c) 1992-2008 The FreeBSD Project.
> Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993,  
> 1994
>        The Regents of the University of California. All rights  
> reserved.
> FreeBSD is a registered trademark of The FreeBSD Foundation.
> FreeBSD 7.0-RELEASE-p5 #0: Mon Nov  3 13:19:30 BRST 2008
>    root@tst.ciplan:/usr/obj/usr/src/sys/TREX-64
> Timecounter "i8254" frequency 1193182 Hz quality 0
> CPU: Intel(R) Xeon(R) CPU           E5410  @ 2.33GHz (2357.36-MHz K8- 
> class CPU)
>  Origin = "GenuineIntel"  Id = 0x10678  Stepping = 8
>
> Features 
> =0xfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CM
> OV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS>
>  Features2=0x82201<SSE3,SSSE3,CX16,<b19>>
>  AMD Features=0x20100800<SYSCALL,NX,LM>
>  AMD Features2=0x1<LAHF>
> usable memory = 4013707264 (3827 MB)
> avail memory  = 3883839488 (3703 MB)
> ACPI APIC Table: <PTLTD          APIC  >
> FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
> cpu0 (BSP): APIC ID:  0
> cpu1 (AP): APIC ID:  1
> cpu2 (AP): APIC ID:  2
> cpu3 (AP): APIC ID:  3
> MADT: Forcing active-low polarity and level trigger for SCI
> ioapic0 <Version 1.1> irqs 0-23 on motherboard
> kbd1 at kbdmux0
> ath_hal: 0.9.20.3 (AR5210, AR5211, AR5212, RF5111, RF5112, RF2413,  
> RF5413)
> hptrr: HPT RocketRAID controller driver v1.1 (Nov  3 2008 13:19:19)
> acpi0: <PTLTD   RSDT> on motherboard
> acpi0: [ITHREAD]
> acpi0: Power Button (fixed)
> Timecounter "ACPI-safe" frequency 3579545 Hz quality 850
> acpi_timer0: <24-bit timer at 3.579545MHz> port 0x1008-0x100b on acpi0
> cpu0: <ACPI CPU> on acpi0
> acpi_throttle0: <ACPI CPU Throttling> on cpu0
> cpu1: <ACPI CPU> on acpi0
> acpi_throttle1: <ACPI CPU Throttling> on cpu1
> acpi_throttle1: failed to attach P_CNT
> device_attach: acpi_throttle1 attach returned 6
> cpu2: <ACPI CPU> on acpi0
> acpi_throttle2: <ACPI CPU Throttling> on cpu2
> acpi_throttle2: failed to attach P_CNT
> device_attach: acpi_throttle2 attach returned 6
> cpu3: <ACPI CPU> on acpi0
> acpi_throttle3: <ACPI CPU Throttling> on cpu3
> acpi_throttle3: failed to attach P_CNT
> device_attach: acpi_throttle3 attach returned 6
>
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