Date: Fri, 29 Apr 2011 18:20:12 +0000 (UTC) From: Jung-uk Kim <jkim@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/x86/x86 tsc.c Message-ID: <201104291820.p3TIKN1q031049@repoman.freebsd.org>
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jkim 2011-04-29 18:20:12 UTC
FreeBSD src repository
Modified files:
sys/x86/x86 tsc.c
Log:
SVN rev 221214 on 2011-04-29 18:20:12Z by jkim
Detect VMware guest and set the TSC frequency as reported by the hypervisor.
VMware products virtualize TSC and it run at fixed frequency in so-called
"apparent time". Although virtualized i8254 also runs in apparent time, TSC
calibration always gives slightly off frequency because of the complicated
timer emulation and lost-tick correction mechanism.
Revision Changes Path
1.17 +101 -17 src/sys/x86/x86/tsc.c
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