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cpupower: Show Intel turbo ratio support via ./cpupower frequency-info

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This adds the last piece missing from turbostat (if called with -v).
It shows on Intel machines supporting Turbo Boost how many cores
have to be active/idle to enter which boost mode (frequency).

Whether the HW really enters these boost modes can be verified via
./cpupower monitor.

Signed-off-by: Thomas Renninger <trenn@suse.de>
CC: lenb@kernel.org
CC: linux@dominikbrodowski.net
CC: cpufreq@vger.kernel.org
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
This commit is contained in:
Thomas Renninger
2011-07-21 11:54:53 +02:00
committed by Dominik Brodowski
parent 76b659a31d
commit 8fb2e440b2
4 changed files with 95 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
tools/power/cpupower/utils/helpers/msr.c
View File

@@ -11,6 +11,7 @@
#define MSR_IA32_PERF_STATUS 0x198
#define MSR_IA32_MISC_ENABLES 0x1a0
#define MSR_IA32_ENERGY_PERF_BIAS 0x1b0
#define MSR_NEHALEM_TURBO_RATIO_LIMIT 0x1ad
/*
* read_msr
@@ -79,6 +80,7 @@ int msr_intel_has_boost_support(unsigned int cpu)
ret = read_msr(cpu, MSR_IA32_MISC_ENABLES, &misc_enables);
if (ret)
return ret;
return (misc_enables >> 38) & 0x1;
}
@@ -119,4 +121,18 @@ int msr_intel_set_perf_bias(unsigned int cpu, unsigned int val)
return ret;
return 0;
}
unsigned long long msr_intel_get_turbo_ratio(unsigned int cpu)
{
unsigned long long val;
int ret;
if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_HAS_TURBO_RATIO))
return -1;
ret = read_msr(cpu, MSR_NEHALEM_TURBO_RATIO_LIMIT, &val);
if (ret)
return ret;
return val;
}
#endif