Date: Fri, 3 Dec 2010 21:06:30 +0000 (UTC) From: Jung-uk Kim <jkim@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r216159 - in head/sys: amd64/amd64 i386/i386 Message-ID: <201012032106.oB3L6Uwd025889@svn.freebsd.org>
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Author: jkim Date: Fri Dec 3 21:06:30 2010 New Revision: 216159 URL: http://svn.freebsd.org/changeset/base/216159 Log: Do not change CPU ticker frequency if TSC is P-state invariant. Note this change was meant to be committed with r184102 (and its subsequent MFCs) but it fell off somehow. Pointyhat to: jkim MFC after: 3 days Modified: head/sys/amd64/amd64/tsc.c head/sys/i386/i386/tsc.c Modified: head/sys/amd64/amd64/tsc.c ============================================================================== --- head/sys/amd64/amd64/tsc.c Fri Dec 3 20:39:06 2010 (r216158) +++ head/sys/amd64/amd64/tsc.c Fri Dec 3 21:06:30 2010 (r216159) @@ -146,6 +146,9 @@ tsc_levels_changed(void *arg, int unit) int count, error; uint64_t max_freq; + if (tsc_is_invariant) + return; + /* Only use values from the first CPU, assuming all are equal. */ if (unit != 0) return; Modified: head/sys/i386/i386/tsc.c ============================================================================== --- head/sys/i386/i386/tsc.c Fri Dec 3 20:39:06 2010 (r216158) +++ head/sys/i386/i386/tsc.c Fri Dec 3 21:06:30 2010 (r216159) @@ -174,6 +174,9 @@ tsc_levels_changed(void *arg, int unit) int count, error; uint64_t max_freq; + if (tsc_is_invariant) + return; + /* Only use values from the first CPU, assuming all are equal. */ if (unit != 0) return;
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