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>
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 29e9cd5..bfb0cec 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -84,6 +84,8 @@
unsigned int do_dts;
unsigned int do_ptm;
unsigned long long gfx_cur_rc6_ms;
+unsigned long long cpuidle_cur_cpu_lpi_us;
+unsigned long long cpuidle_cur_sys_lpi_us;
unsigned int gfx_cur_mhz;
unsigned int tcc_activation_temp;
unsigned int tcc_activation_temp_override;
@@ -188,6 +190,8 @@
unsigned long long pc8;
unsigned long long pc9;
unsigned long long pc10;
+ unsigned long long cpu_lpi;
+ unsigned long long sys_lpi;
unsigned long long pkg_wtd_core_c0;
unsigned long long pkg_any_core_c0;
unsigned long long pkg_any_gfxe_c0;
@@ -377,6 +381,8 @@
{ 0x0, "Pkg%pc8" },
{ 0x0, "Pkg%pc9" },
{ 0x0, "Pkg%pc10" },
+ { 0x0, "CPU%LPI" },
+ { 0x0, "SYS%LPI" },
{ 0x0, "PkgWatt" },
{ 0x0, "CorWatt" },
{ 0x0, "GFXWatt" },
@@ -396,6 +402,7 @@
{ 0x0, "Any%C0" },
{ 0x0, "GFX%C0" },
{ 0x0, "CPUGFX%" },
+ { 0x0, "Node%" },
};
@@ -427,6 +434,8 @@
#define BIC_Pkgpc8 (1ULL << 23)
#define BIC_Pkgpc9 (1ULL << 24)
#define BIC_Pkgpc10 (1ULL << 25)
+#define BIC_CPU_LPI (1ULL << 26)
+#define BIC_SYS_LPI (1ULL << 27)
#define BIC_PkgWatt (1ULL << 26)
#define BIC_CorWatt (1ULL << 27)
#define BIC_GFXWatt (1ULL << 28)
@@ -653,6 +662,10 @@
outp += sprintf(outp, "%sPkg%%pc9", (printed++ ? delim : ""));
if (DO_BIC(BIC_Pkgpc10))
outp += sprintf(outp, "%sPk%%pc10", (printed++ ? delim : ""));
+ if (DO_BIC(BIC_CPU_LPI))
+ outp += sprintf(outp, "%sCPU%%LPI", (printed++ ? delim : ""));
+ if (DO_BIC(BIC_SYS_LPI))
+ outp += sprintf(outp, "%sSYS%%LPI", (printed++ ? delim : ""));
if (do_rapl && !rapl_joules) {
if (DO_BIC(BIC_PkgWatt))
@@ -757,6 +770,9 @@
outp += sprintf(outp, "pc8: %016llX\n", p->pc8);
outp += sprintf(outp, "pc9: %016llX\n", p->pc9);
outp += sprintf(outp, "pc10: %016llX\n", p->pc10);
+ outp += sprintf(outp, "pc10: %016llX\n", p->pc10);
+ outp += sprintf(outp, "cpu_lpi: %016llX\n", p->cpu_lpi);
+ outp += sprintf(outp, "sys_lpi: %016llX\n", p->sys_lpi);
outp += sprintf(outp, "Joules PKG: %0X\n", p->energy_pkg);
outp += sprintf(outp, "Joules COR: %0X\n", p->energy_cores);
outp += sprintf(outp, "Joules GFX: %0X\n", p->energy_gfx);
@@ -981,6 +997,11 @@
if (DO_BIC(BIC_Pkgpc10))
outp += sprintf(outp, "%s%.2f", (printed++ ? delim : ""), 100.0 * p->pc10/tsc);
+ if (DO_BIC(BIC_CPU_LPI))
+ outp += sprintf(outp, "%s%.2f", (printed++ ? delim : ""), 100.0 * p->cpu_lpi / 1000000.0 / interval_float);
+ if (DO_BIC(BIC_SYS_LPI))
+ outp += sprintf(outp, "%s%.2f", (printed++ ? delim : ""), 100.0 * p->sys_lpi / 1000000.0 / interval_float);
+
/*
* If measurement interval exceeds minimum RAPL Joule Counter range,
* indicate that results are suspect by printing "**" in fraction place.
@@ -1106,6 +1127,8 @@
old->pc8 = new->pc8 - old->pc8;
old->pc9 = new->pc9 - old->pc9;
old->pc10 = new->pc10 - old->pc10;
+ old->cpu_lpi = new->cpu_lpi - old->cpu_lpi;
+ old->sys_lpi = new->sys_lpi - old->sys_lpi;
old->pkg_temp_c = new->pkg_temp_c;
/* flag an error when rc6 counter resets/wraps */
@@ -1297,6 +1320,8 @@
p->pc8 = 0;
p->pc9 = 0;
p->pc10 = 0;
+ p->cpu_lpi = 0;
+ p->sys_lpi = 0;
p->energy_pkg = 0;
p->energy_dram = 0;
@@ -1385,6 +1410,9 @@
average.packages.pc9 += p->pc9;
average.packages.pc10 += p->pc10;
+ average.packages.cpu_lpi = p->cpu_lpi;
+ average.packages.sys_lpi = p->sys_lpi;
+
average.packages.energy_pkg += p->energy_pkg;
average.packages.energy_dram += p->energy_dram;
average.packages.energy_cores += p->energy_cores;
@@ -1728,6 +1756,11 @@
if (get_msr(cpu, MSR_PKG_C10_RESIDENCY, &p->pc10))
return -13;
+ if (DO_BIC(BIC_CPU_LPI))
+ p->cpu_lpi = cpuidle_cur_cpu_lpi_us;
+ if (DO_BIC(BIC_SYS_LPI))
+ p->sys_lpi = cpuidle_cur_sys_lpi_us;
+
if (do_rapl & RAPL_PKG) {
if (get_msr(cpu, MSR_PKG_ENERGY_STATUS, &msr))
return -13;
@@ -2595,6 +2628,52 @@
}
/*
+ * snapshot_cpu_lpi()
+ *
+ * record snapshot of
+ * /sys/devices/system/cpu/cpuidle/low_power_idle_cpu_residency_us
+ *
+ * return 1 if config change requires a restart, else return 0
+ */
+int snapshot_cpu_lpi_us(void)
+{
+ FILE *fp;
+ int retval;
+
+ fp = fopen_or_die("/sys/devices/system/cpu/cpuidle/low_power_idle_cpu_residency_us", "r");
+
+ retval = fscanf(fp, "%lld", &cpuidle_cur_cpu_lpi_us);
+ if (retval != 1)
+ err(1, "CPU LPI");
+
+ fclose(fp);
+
+ return 0;
+}
+/*
+ * snapshot_sys_lpi()
+ *
+ * record snapshot of
+ * /sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us
+ *
+ * return 1 if config change requires a restart, else return 0
+ */
+int snapshot_sys_lpi_us(void)
+{
+ FILE *fp;
+ int retval;
+
+ fp = fopen_or_die("/sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us", "r");
+
+ retval = fscanf(fp, "%lld", &cpuidle_cur_sys_lpi_us);
+ if (retval != 1)
+ err(1, "SYS LPI");
+
+ fclose(fp);
+
+ return 0;
+}
+/*
* snapshot /proc and /sys files
*
* return 1 if configuration restart needed, else return 0
@@ -2611,6 +2690,12 @@
if (DO_BIC(BIC_GFXMHz))
snapshot_gfx_mhz();
+ if (DO_BIC(BIC_CPU_LPI))
+ snapshot_cpu_lpi_us();
+
+ if (DO_BIC(BIC_SYS_LPI))
+ snapshot_sys_lpi_us();
+
return 0;
}
@@ -4406,6 +4491,16 @@
if (!access("/sys/class/graphics/fb0/device/drm/card0/gt_cur_freq_mhz", R_OK))
BIC_PRESENT(BIC_GFXMHz);
+ if (!access("/sys/devices/system/cpu/cpuidle/low_power_idle_cpu_residency_us", R_OK))
+ BIC_PRESENT(BIC_CPU_LPI);
+ else
+ BIC_NOT_PRESENT(BIC_CPU_LPI);
+
+ if (!access("/sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us", R_OK))
+ BIC_PRESENT(BIC_SYS_LPI);
+ else
+ BIC_NOT_PRESENT(BIC_SYS_LPI);
+
if (!quiet)
decode_misc_feature_control();