tools/power turbostat: dump BDX, SKX automatic C-state conversion bit
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>
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index af1f810..14530de 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -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);