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tools/power turbostat: dump BDX, SKX automatic C-state conversion bit

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BDX and SKX have a bit that tells them to PROMOTE shallow
C-states requests to MWAIT(C6).  It is generally a BIOS bug
if this bit is set.  As we have encountered that BIOS bug,
let's print this bit in turbostat debug output.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Artem Bityutskiy 2017-09-05 15:14:08 +03:00 committed by Len Brown
parent 733ef0f8e7
commit ac980e1357
1 changed files with 18 additions and 1 deletions
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19
tools/power/x86/turbostat/turbostat.c
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@ -91,6 +91,7 @@ double rapl_power_units, rapl_time_units;
double rapl_dram_energy_units, rapl_energy_units;
double rapl_joule_counter_range;
unsigned int do_core_perf_limit_reasons;
unsigned int has_automatic_cstate_conversion;
unsigned int do_gfx_perf_limit_reasons;
unsigned int do_ring_perf_limit_reasons;
unsigned int crystal_hz;
@ -2118,7 +2119,7 @@ dump_nhm_cst_cfg(void)
fprintf(outf, "cpu%d: MSR_PKG_CST_CONFIG_CONTROL: 0x%08llx", base_cpu, msr);
fprintf(outf, " (%s%s%s%s%slocked: pkg-cstate-limit=%d: %s)\n",
fprintf(outf, " (%s%s%s%s%slocked: pkg-cstate-limit=%d: %s",
(msr & SNB_C3_AUTO_UNDEMOTE) ? "UNdemote-C3, " : "",
(msr & SNB_C1_AUTO_UNDEMOTE) ? "UNdemote-C1, " : "",
(msr & NHM_C3_AUTO_DEMOTE) ? "demote-C3, " : "",
@ -2126,6 +2127,15 @@ dump_nhm_cst_cfg(void)
(msr & (1 << 15)) ? "" : "UN",
(unsigned int)msr & 0xF,
pkg_cstate_limit_strings[pkg_cstate_limit]);
#define AUTOMATIC_CSTATE_CONVERSION (1UL << 16)
if (has_automatic_cstate_conversion) {
fprintf(outf, ", automatic c-state conversion=%s",
(msr & AUTOMATIC_CSTATE_CONVERSION) ? "on" : "off");
}
fprintf(outf, ")\n");
return;
}
@ -3632,6 +3642,12 @@ void perf_limit_reasons_probe(unsigned int family, unsigned int model)
}
}
void automatic_cstate_conversion_probe(unsigned int family, unsigned int model)
{
if (is_skx(family, model) || is_bdx(family, model))
has_automatic_cstate_conversion = 1;
}
int print_thermal(struct thread_data *t, struct core_data *c, struct pkg_data *p)
{
unsigned long long msr;
@ -4370,6 +4386,7 @@ void process_cpuid()
rapl_probe(family, model);
perf_limit_reasons_probe(family, model);
automatic_cstate_conversion_probe(family, model);
if (!quiet)
dump_cstate_pstate_config_info(family, model);