Module devices::tsc

Handles operations using platform Time Stamp Counter (TSC).

Modules

• calibrate 🔒
• cpuid 🔒
• grouping 🔒

Structs

• TscState
• TscSyncMitigations

Enums

• TscCalibrationError

Statics

• TSC_STATE 🔒

Functions

• bus_freq_hz
  Returns the Bus frequency in Hz, based on reading Intel-specific cpuids, or None if the frequency can’t be determined from cpuids.
• calibrate_tsc_state
  Calibrate the TSC state.
• fake_tsc_frequency_cpuid
  Given the tsc frequency in Hz and the bus frequency in Hz, return a fake version of cpuid leaf 0x15.
• get_tsc_sync_mitigations
  Given the state of the host TSCs in tsc_state, and the number of vcpus that are intended to be run, return a set of affinities and TSC offsets to apply to those vcpus.
• rdtsc_safe 🔒
• standard_deviation
  Get the standard deviation of a Vec<T>.
• tsc_freq_hz
  Returns the TSC frequency in Hz, based on reading Intel-specific cpuids, or None if the frequency can’t be determined from cpuids.
• tsc_frequency
  Returns the frequency of the host TSC. Calibration only happens once.
• tsc_frequency_cpuid
  Gets the TSC frequency for cpuid leaf 0x15 from the existing leaves 0x15 and 0x16.
• tsc_state
  Returns the state of the host TSCs. Calibration only happens once.
• tsc_sync_mitigations_inner 🔒

Type Definitions

• CpuidCountFn
  Function to retrieve the given CPUID leaf and sub-leaf.