From owner-freebsd-hackers@FreeBSD.ORG  Fri Sep 14 12:48:41 2012
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To: Mark Saad <nonesuch@longcount.org>
References: <op.wbwe9s0k34t2sn@tech304> <201205311157.42909.jhb@freebsd.org>
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Date: Fri, 14 Sep 2012 07:48:31 -0500
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From: Mark Felder <feld@feld.me>
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Cc: freebsd-hackers@freebsd.org
Subject: Re: Please help me diagnose this crazy VMWare/FreeBSD 8.x crash
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Hi Mark,

Here's the output of our VMs running on ESXi 4.1u1

FreeBSD 7.4:
# sysctl kern.timecounter.choice
kern.timecounter.choice: TSC(800) ACPI-safe(850) i8254(0) dummy(-1000000)
# sysctl kern.timecounter.hardware
kern.timecounter.hardware: ACPI-safe

FreeBSD 8.3:
# sysctl kern.timecounter.choice
kern.timecounter.choice: TSC(800) ACPI-safe(850) i8254(0) dummy(-1000000)
# sysctl kern.timecounter.hardware
kern.timecounter.hardware: ACPI-safe

FreeBSD 9.0:
# sysctl kern.timecounter.choice
kern.timecounter.choice: TSC(1000) i8254(0) ACPI-fast(900) dummy(-1000000)
# sysctl kern.timecounter.hardware
kern.timecounter.hardware: TSC


Note that both 8.3 and 9.0 crash, while 7.4 does not.