VirtualBox

Changeset 1851 in vbox


Ignore:
Timestamp:
Apr 1, 2007 9:41:05 PM (18 years ago)
Author:
vboxsync
svn:sync-xref-src-repo-rev:
20053
Message:

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File:
1 edited

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  • trunk/src/VBox/HostDrivers/Support/SUPDRVShared.c

    r1850 r1851  
    40904090    /*
    40914091     * The problem here is that AMD processors with power management features
    4092      * may easily end up with different TSCs because the CPUs or even core
    4093      * on the same physical chip runs at different frequencies to safe power.
     4092     * may easily end up with different TSCs because the CPUs or even cores
     4093     * on the same physical chip run at different frequencies to save power.
    40944094     *
    40954095     * It is rumoured that this will be corrected with Barcelona and it's
    40964096     * expected that this will be indicated by the TscInvariant bit in
    40974097     * cpuid(0x80000007). So, the "difficult" bit here is to correctly
    4098      * identify the older CPUs which doesn't do different frequency and
     4098     * identify the older CPUs which don't do different frequency and
    40994099     * can be relied upon to have somewhat uniform TSC between the cpus.
    41004100     */
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