Date: Wed, 22 Oct 2008 13:56:09 -0400 From: Jung-uk Kim <jkim@FreeBSD.org> To: src-committers@FreeBSD.org Cc: svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org Subject: Re: svn commit: r184169 - in head/sys: amd64/amd64 i386/i386 Message-ID: <200810221356.20156.jkim@FreeBSD.org> In-Reply-To: <200810221730.m9MHUc0R034507@svn.freebsd.org> References: <200810221730.m9MHUc0R034507@svn.freebsd.org>
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On Wednesday 22 October 2008 01:30 pm, Jung-uk Kim wrote: > Author: jkim > Date: Wed Oct 22 17:30:37 2008 > New Revision: 184169 > URL: http://svn.freebsd.org/changeset/base/184169 > > Log: > Add AMD Family 0Fh, Model 6Bh, Stepping 2 to the list of > invariant TSCs and fix i386 test. Here is a simple test program: http://people.freebsd.org/~jkim/get_tsc.c How to find whether you have P-state invariant TSC: - Kill powerd if you are running it. - Set kern.timecounter.hardware to something other than TSC. - Set the lowest CPU frequency manually and run the test. If it reports something close to maximum frequency, you have P-state invariant TSC. FYI... Jung-uk Kim
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