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Note that est capabilities are automatically loaded by the cpufreq(4) driver.
hw.est.msr_info | |
Attempt to infer information from direct probing of the msr. Should only be used in diagnostic cases. (default 0) | |
hw.est.strict | |
Validate frequency requested is accepted by the CPU when set. It appears that this will only work on single core cpus. (default 0) | |
dev.est.%d.%desc | |
Description of support, almost always Enhanced SpeedStep Frequency Control. | |
dev.est.0.%desc: Enhanced SpeedStep Frequency Control
dev.est.%d.%driver | |
Driver in use, always est. | |
dev.est.0.%driver: est
dev.est.%d.%parent | |
The CPU that is exposing these frequencies. For example cpu0. | |
dev.est.0.%parent: cpu0
dev.est.%d.freq_settings. | |
The valid frequencies that are allowed by this CPU and their step values. | |
dev.est.0.freq_settings: 2201/45000 2200/45000 2000/39581 1900/37387 | |
1800/34806 1700/32703 1600/30227 1500/28212 1400/25828 1300/23900 1200/21613 1100/19775 1000/17582 900/15437 800/13723 | |
est%d: <Enhanced SpeedStep Frequency Control> on cpu%d |
Indicates normal startup of this interface. |
est: CPU supports Enhanced Speedstep, but is not recognized.
est: cpu_vendor GenuineIntel, msr 471c471c0600471c device_attach: est%d attach returned 6 | |
Indicates all attempts to attach to this interface have failed. This usually indicates an improper BIOS setting restricting O/S control of the CPU speeds. Consult your BIOS documentation for more details. | |
Intel 64 and IA-32 Architectures Software Developer Manuals,
EST (4) | April 21, 2020 |
Main index | Section 4 | Options |
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