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| /openbmc/linux/tools/power/x86/turbostat/ |
| H A D | turbostat.c | aeb01e6d Tue Apr 27 23:18:12 CDT 2021 Chen Yu <yu.c.chen@intel.com> tools/power turbostat: Print the C-state Pre-wake settings
C-state pre-wake setting[1] is an optimization for some Intel CPUs to
be woken up from deep C-states in order to reduce latency. According to
the spec, the BIT30 is the C-state Pre-wake Disable. Expose this setting
accordingly.
Sample output from turbostat:
...
cpu51: MSR_IA32_POWER_CTL: 0x1a00a40059 (C1E auto-promotion: DISabled)
C-state Pre-wake: ENabled
cpu51: MSR_TURBO_RATIO_LIMIT: 0x2021212121212224
...
[1] https://intel.github.io/wult/#c-state-pre-wake
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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