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/freebsd-10.3-release/sys/x86/cpufreq/
H A Dp4tcc.cdiff 141455 Mon Feb 07 11:35:24 MST 2005 sobomax Fix the problem with incorrect throttling level reported immediately after
reboot. Safter the reboot the TCC is usually in the Automatic mode, in which
reading current performance level is likely to produce bogus results make sure
to switch it to the On-Demand mode and set to some known performance level.
Unfortunately there is no reliable way to check that TCC is in the Automatic
mode. Reading bit 4 of ACPI Thermal Monitor Control Register produces 0
regardless of the current mode.

MFC after: 1 week

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