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tools/power turbostat: Read base_hz and bclk from CPUID.16H if available

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If MSRs cannot be read, values can be obtained from cpuid.

Signed-off-by: Patryk Wlazlyn <patryk.wlazlyn@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Patryk Wlazlyn 2024-01-22 15:22:35 +01:00 committed by Len Brown
parent fb5ceca046
commit 538d505fde
1 changed files with 9 additions and 0 deletions
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9
tools/power/x86/turbostat/turbostat.c
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@ -5848,6 +5848,15 @@ void process_cpuid()
base_mhz = max_mhz = bus_mhz = edx = 0;
__cpuid(0x16, base_mhz, max_mhz, bus_mhz, edx);
bclk = bus_mhz;
base_hz = base_mhz * 1000000;
has_base_hz = 1;
if (platform->enable_tsc_tweak)
tsc_tweak = base_hz / tsc_hz;
if (!quiet)
fprintf(outf, "CPUID(0x16): base_mhz: %d max_mhz: %d bus_mhz: %d\n",
base_mhz, max_mhz, bus_mhz);