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tools/power turbostat: Decode MSR_MISC_PWR_MGMT

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This MSR is helpful to show if P-state HW coordination
is enabled or disabled.

Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Len Brown 2015-12-03 01:35:36 -05:00
parent 7f5c258e1c
commit f0057310b4
1 changed files with 23 additions and 0 deletions
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23
tools/power/x86/turbostat/turbostat.c
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@ -2783,6 +2783,26 @@ void decode_misc_enable_msr(void)
msr & (1 << 18) ? "MONITOR" : "");
}
/*
* Decode MSR_MISC_PWR_MGMT
*
* Decode the bits according to the Nehalem documentation
* bit[0] seems to continue to have same meaning going forward
* bit[1] less so...
*/
void decode_misc_pwr_mgmt_msr(void)
{
unsigned long long msr;
if (!do_nhm_platform_info)
return;
if (!get_msr(base_cpu, MSR_MISC_PWR_MGMT, &msr))
fprintf(stderr, "cpu%d: MSR_MISC_PWR_MGMT: 0x%08llx (%sable-EIST_Coordination %sable-EPB)\n",
base_cpu, msr,
msr & (1 << 0) ? "DIS" : "EN",
msr & (1 << 1) ? "EN" : "DIS");
}
void process_cpuid()
{
@ -2936,6 +2956,9 @@ void process_cpuid()
do_slm_cstates = is_slm(family, model);
do_knl_cstates = is_knl(family, model);
if (debug)
decode_misc_pwr_mgmt_msr();
rapl_probe(family, model);
perf_limit_reasons_probe(family, model);