tools/power turbostat: Build-in "Low Power Idle" counters support
Linux 4.15 exports the ACPI Low Power Idle Table's counters in /sys/devices/system/cpu/cpuidle/ low_power_idle_cpu_residency_us Show this in the "CPU%LPI" column. Today this reflects the "North Complex" residency in PC10, so expect it to closely follow "Pk%pc10". low_power_idle_system_residency_us Show this in the "SYS%LPI" column. Today, this reflects the North is in PC10, plus the PCH is sufficiently quiescent to save additional power via the "S0ix" system state, as measured by the PCH SLP_S0 counter. Signed-off-by: Len Brown <len.brown@intel.com>hifive-unleashed-5.1
Len Brown
parent
e29dc460d6
commit
be0e54c4eb
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@ -84,6 +84,8 @@ unsigned int do_rapl;
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unsigned int do_dts;
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unsigned int do_ptm;
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unsigned long long gfx_cur_rc6_ms;
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unsigned long long cpuidle_cur_cpu_lpi_us;
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unsigned long long cpuidle_cur_sys_lpi_us;
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unsigned int gfx_cur_mhz;
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unsigned int tcc_activation_temp;
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unsigned int tcc_activation_temp_override;
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@ -188,6 +190,8 @@ struct pkg_data {
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unsigned long long pc8;
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unsigned long long pc9;
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unsigned long long pc10;
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unsigned long long cpu_lpi;
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unsigned long long sys_lpi;
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unsigned long long pkg_wtd_core_c0;
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unsigned long long pkg_any_core_c0;
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unsigned long long pkg_any_gfxe_c0;
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@ -377,6 +381,8 @@ struct msr_counter bic[] = {
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{ 0x0, "Pkg%pc8" },
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{ 0x0, "Pkg%pc9" },
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{ 0x0, "Pkg%pc10" },
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{ 0x0, "CPU%LPI" },
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{ 0x0, "SYS%LPI" },
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{ 0x0, "PkgWatt" },
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{ 0x0, "CorWatt" },
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{ 0x0, "GFXWatt" },
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@ -396,6 +402,7 @@ struct msr_counter bic[] = {
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{ 0x0, "Any%C0" },
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{ 0x0, "GFX%C0" },
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{ 0x0, "CPUGFX%" },
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{ 0x0, "Node%" },
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};
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@ -427,6 +434,8 @@ struct msr_counter bic[] = {
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#define BIC_Pkgpc8 (1ULL << 23)
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#define BIC_Pkgpc9 (1ULL << 24)
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#define BIC_Pkgpc10 (1ULL << 25)
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#define BIC_CPU_LPI (1ULL << 26)
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#define BIC_SYS_LPI (1ULL << 27)
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#define BIC_PkgWatt (1ULL << 26)
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#define BIC_CorWatt (1ULL << 27)
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#define BIC_GFXWatt (1ULL << 28)
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@ -653,6 +662,10 @@ void print_header(char *delim)
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outp += sprintf(outp, "%sPkg%%pc9", (printed++ ? delim : ""));
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if (DO_BIC(BIC_Pkgpc10))
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outp += sprintf(outp, "%sPk%%pc10", (printed++ ? delim : ""));
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if (DO_BIC(BIC_CPU_LPI))
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outp += sprintf(outp, "%sCPU%%LPI", (printed++ ? delim : ""));
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if (DO_BIC(BIC_SYS_LPI))
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outp += sprintf(outp, "%sSYS%%LPI", (printed++ ? delim : ""));
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if (do_rapl && !rapl_joules) {
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if (DO_BIC(BIC_PkgWatt))
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@ -757,6 +770,9 @@ int dump_counters(struct thread_data *t, struct core_data *c,
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outp += sprintf(outp, "pc8: %016llX\n", p->pc8);
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outp += sprintf(outp, "pc9: %016llX\n", p->pc9);
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outp += sprintf(outp, "pc10: %016llX\n", p->pc10);
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outp += sprintf(outp, "pc10: %016llX\n", p->pc10);
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outp += sprintf(outp, "cpu_lpi: %016llX\n", p->cpu_lpi);
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outp += sprintf(outp, "sys_lpi: %016llX\n", p->sys_lpi);
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outp += sprintf(outp, "Joules PKG: %0X\n", p->energy_pkg);
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outp += sprintf(outp, "Joules COR: %0X\n", p->energy_cores);
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outp += sprintf(outp, "Joules GFX: %0X\n", p->energy_gfx);
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@ -981,6 +997,11 @@ int format_counters(struct thread_data *t, struct core_data *c,
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if (DO_BIC(BIC_Pkgpc10))
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outp += sprintf(outp, "%s%.2f", (printed++ ? delim : ""), 100.0 * p->pc10/tsc);
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if (DO_BIC(BIC_CPU_LPI))
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outp += sprintf(outp, "%s%.2f", (printed++ ? delim : ""), 100.0 * p->cpu_lpi / 1000000.0 / interval_float);
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if (DO_BIC(BIC_SYS_LPI))
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outp += sprintf(outp, "%s%.2f", (printed++ ? delim : ""), 100.0 * p->sys_lpi / 1000000.0 / interval_float);
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/*
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* If measurement interval exceeds minimum RAPL Joule Counter range,
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* indicate that results are suspect by printing "**" in fraction place.
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@ -1106,6 +1127,8 @@ delta_package(struct pkg_data *new, struct pkg_data *old)
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old->pc8 = new->pc8 - old->pc8;
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old->pc9 = new->pc9 - old->pc9;
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old->pc10 = new->pc10 - old->pc10;
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old->cpu_lpi = new->cpu_lpi - old->cpu_lpi;
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old->sys_lpi = new->sys_lpi - old->sys_lpi;
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old->pkg_temp_c = new->pkg_temp_c;
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/* flag an error when rc6 counter resets/wraps */
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@ -1297,6 +1320,8 @@ void clear_counters(struct thread_data *t, struct core_data *c, struct pkg_data
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p->pc8 = 0;
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p->pc9 = 0;
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p->pc10 = 0;
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p->cpu_lpi = 0;
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p->sys_lpi = 0;
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p->energy_pkg = 0;
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p->energy_dram = 0;
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@ -1385,6 +1410,9 @@ int sum_counters(struct thread_data *t, struct core_data *c,
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average.packages.pc9 += p->pc9;
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average.packages.pc10 += p->pc10;
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average.packages.cpu_lpi = p->cpu_lpi;
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average.packages.sys_lpi = p->sys_lpi;
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average.packages.energy_pkg += p->energy_pkg;
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average.packages.energy_dram += p->energy_dram;
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average.packages.energy_cores += p->energy_cores;
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@ -1728,6 +1756,11 @@ retry:
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if (get_msr(cpu, MSR_PKG_C10_RESIDENCY, &p->pc10))
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return -13;
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if (DO_BIC(BIC_CPU_LPI))
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p->cpu_lpi = cpuidle_cur_cpu_lpi_us;
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if (DO_BIC(BIC_SYS_LPI))
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p->sys_lpi = cpuidle_cur_sys_lpi_us;
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if (do_rapl & RAPL_PKG) {
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if (get_msr(cpu, MSR_PKG_ENERGY_STATUS, &msr))
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return -13;
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@ -2594,6 +2627,52 @@ int snapshot_gfx_mhz(void)
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return 0;
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}
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/*
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* snapshot_cpu_lpi()
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*
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* record snapshot of
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* /sys/devices/system/cpu/cpuidle/low_power_idle_cpu_residency_us
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*
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* return 1 if config change requires a restart, else return 0
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*/
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int snapshot_cpu_lpi_us(void)
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{
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FILE *fp;
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int retval;
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fp = fopen_or_die("/sys/devices/system/cpu/cpuidle/low_power_idle_cpu_residency_us", "r");
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retval = fscanf(fp, "%lld", &cpuidle_cur_cpu_lpi_us);
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if (retval != 1)
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err(1, "CPU LPI");
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fclose(fp);
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return 0;
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}
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/*
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* snapshot_sys_lpi()
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*
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* record snapshot of
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* /sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us
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*
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* return 1 if config change requires a restart, else return 0
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*/
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int snapshot_sys_lpi_us(void)
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{
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FILE *fp;
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int retval;
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fp = fopen_or_die("/sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us", "r");
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retval = fscanf(fp, "%lld", &cpuidle_cur_sys_lpi_us);
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if (retval != 1)
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err(1, "SYS LPI");
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fclose(fp);
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return 0;
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}
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/*
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* snapshot /proc and /sys files
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*
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@ -2611,6 +2690,12 @@ int snapshot_proc_sysfs_files(void)
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if (DO_BIC(BIC_GFXMHz))
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snapshot_gfx_mhz();
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if (DO_BIC(BIC_CPU_LPI))
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snapshot_cpu_lpi_us();
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if (DO_BIC(BIC_SYS_LPI))
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snapshot_sys_lpi_us();
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return 0;
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}
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@ -4406,6 +4491,16 @@ void process_cpuid()
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if (!access("/sys/class/graphics/fb0/device/drm/card0/gt_cur_freq_mhz", R_OK))
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BIC_PRESENT(BIC_GFXMHz);
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if (!access("/sys/devices/system/cpu/cpuidle/low_power_idle_cpu_residency_us", R_OK))
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BIC_PRESENT(BIC_CPU_LPI);
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else
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BIC_NOT_PRESENT(BIC_CPU_LPI);
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if (!access("/sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us", R_OK))
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BIC_PRESENT(BIC_SYS_LPI);
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else
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BIC_NOT_PRESENT(BIC_SYS_LPI);
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if (!quiet)
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decode_misc_feature_control();
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