diff options
| author | Artem Bityutskiy <artem.bityutskiy@linux.intel.com> | 2017-09-05 14:14:08 +0200 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2018-06-01 23:15:08 +0200 |
| commit | ac980e1357244299f4c929d9f2c45428b35eeb86 (patch) | |
| tree | f5f6dd36276cb3b5f09e258706a06eaec7d42a28 /tools/power | |
| parent | tools/power turbostat: do not hard-code 25MHz crystal on SKX (diff) | |
| download | linux-ac980e1357244299f4c929d9f2c45428b35eeb86.tar.xz linux-ac980e1357244299f4c929d9f2c45428b35eeb86.zip | |
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>
Diffstat (limited to 'tools/power')
| -rw-r--r-- | tools/power/x86/turbostat/turbostat.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c index af1f81053be9..14530de01e96 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); |