tools/power turbostat: Show uncore frequency

When CONFIG_INTEL_UNCORE_FREQ_CONTROL is effective,
(Linux 5.9 and later), print the current (and default)
min and max uncore frequency limits.

When that driver provides the current uncore frequency
(Linux 5.18 and later), print a UncMHz column
reflecting the current uncore frequency.

Note that UncMHz is an instantaneous sample, not an average.

eg.

$ sudo ./turbostat -S --show frequency
...
Uncore Frequency pkg0 die0: 800 - 3900 MHz (800 - 3900 MHz)
...
Avg_MHz	Busy%	Bzy_MHz	TSC_MHz	UncMHz
28	0.70	4049	3095	3900
Signed-off-by: Len Brown <len.brown@intel.com>

tools/power/x86/turbostat/turbostat.c

@@ -126,6 +126,7 @@ struct msr_counter bic[] = {
 	{ 0x0, "GFXAMHz", "", 0, 0, 0, NULL, 0 },
 	{ 0x0, "IPC", "", 0, 0, 0, NULL, 0 },
 	{ 0x0, "CoreThr", "", 0, 0, 0, NULL, 0 },
+	{ 0x0, "UncMHz", "", 0, 0, 0, NULL, 0 },
 };
 
 #define MAX_BIC (sizeof(bic) / sizeof(struct msr_counter))
@@ -183,10 +184,11 @@ struct msr_counter bic[] = {
 #define	BIC_GFXACTMHz	(1ULL << 51)
 #define	BIC_IPC		(1ULL << 52)
 #define	BIC_CORE_THROT_CNT	(1ULL << 53)
+#define	BIC_UNCORE_MHZ		(1ULL << 54)
 
 #define BIC_TOPOLOGY (BIC_Package | BIC_Node | BIC_CoreCnt | BIC_PkgCnt | BIC_Core | BIC_CPU | BIC_Die )
 #define BIC_THERMAL_PWR ( BIC_CoreTmp | BIC_PkgTmp | BIC_PkgWatt | BIC_CorWatt | BIC_GFXWatt | BIC_RAMWatt | BIC_PKG__ | BIC_RAM__)
-#define BIC_FREQUENCY ( BIC_Avg_MHz | BIC_Busy | BIC_Bzy_MHz | BIC_TSC_MHz | BIC_GFXMHz | BIC_GFXACTMHz )
+#define BIC_FREQUENCY ( BIC_Avg_MHz | BIC_Busy | BIC_Bzy_MHz | BIC_TSC_MHz | BIC_GFXMHz | BIC_GFXACTMHz | BIC_UNCORE_MHZ)
 #define BIC_IDLE ( BIC_sysfs | BIC_CPU_c1 | BIC_CPU_c3 | BIC_CPU_c6 | BIC_CPU_c7 | BIC_GFX_rc6 | BIC_Pkgpc2 | BIC_Pkgpc3 | BIC_Pkgpc6 | BIC_Pkgpc7 | BIC_Pkgpc8 | BIC_Pkgpc9 | BIC_Pkgpc10 | BIC_CPU_LPI | BIC_SYS_LPI | BIC_Mod_c6 | BIC_Totl_c0 | BIC_Any_c0 | BIC_GFX_c0 | BIC_CPUGFX)
 #define BIC_OTHER ( BIC_IRQ | BIC_SMI | BIC_ThreadC | BIC_CoreTmp | BIC_IPC)
 
@@ -393,6 +395,7 @@ struct pkg_data {
 	unsigned long long rapl_pkg_perf_status;	/* MSR_PKG_PERF_STATUS */
 	unsigned long long rapl_dram_perf_status;	/* MSR_DRAM_PERF_STATUS */
 	unsigned int pkg_temp_c;
+	unsigned int uncore_mhz;
 	unsigned long long counter[MAX_ADDED_COUNTERS];
 } *package_even, *package_odd;
 
@@ -988,6 +991,9 @@ void print_header(char *delim)
 		if (DO_BIC(BIC_RAM__))
 			outp += sprintf(outp, "%sRAM_%%", (printed++ ? delim : ""));
 	}
+	if (DO_BIC(BIC_UNCORE_MHZ))
+		outp += sprintf(outp, "%sUncMHz", (printed++ ? delim : ""));
+
 	for (mp = sys.pp; mp; mp = mp->next) {
 		if (mp->format == FORMAT_RAW) {
 			if (mp->width == 64)
@@ -1370,6 +1376,9 @@ int format_counters(struct thread_data *t, struct core_data *c, struct pkg_data
 		outp +=
 		    sprintf(outp, fmt8, (printed++ ? delim : ""),
 			    100.0 * p->rapl_dram_perf_status * rapl_time_units / interval_float);
+	/* UncMHz */
+	if (DO_BIC(BIC_UNCORE_MHZ))
+		outp += sprintf(outp, "%s%d", (printed++ ? delim : ""), p->uncore_mhz);
 
 	for (i = 0, mp = sys.pp; mp; i++, mp = mp->next) {
 		if (mp->format == FORMAT_RAW) {
@@ -1471,6 +1480,7 @@ int delta_package(struct pkg_data *new, struct pkg_data *old)
 	else
 		old->gfx_rc6_ms = new->gfx_rc6_ms - old->gfx_rc6_ms;
 
+	old->uncore_mhz = new->uncore_mhz;
 	old->gfx_mhz = new->gfx_mhz;
 	old->gfx_act_mhz = new->gfx_act_mhz;
 
@@ -1689,6 +1699,7 @@ void clear_counters(struct thread_data *t, struct core_data *c, struct pkg_data
 	p->pkg_temp_c = 0;
 
 	p->gfx_rc6_ms = 0;
+	p->uncore_mhz = 0;
 	p->gfx_mhz = 0;
 	p->gfx_act_mhz = 0;
 	for (i = 0, mp = sys.tp; mp; i++, mp = mp->next)
@@ -1788,6 +1799,7 @@ int sum_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
 	average.packages.energy_gfx += p->energy_gfx;
 
 	average.packages.gfx_rc6_ms = p->gfx_rc6_ms;
+	average.packages.uncore_mhz = p->uncore_mhz;
 	average.packages.gfx_mhz = p->gfx_mhz;
 	average.packages.gfx_act_mhz = p->gfx_act_mhz;
 
@@ -1948,6 +1960,16 @@ int get_mp(int cpu, struct msr_counter *mp, unsigned long long *counterp)
 	return 0;
 }
 
+unsigned long long get_uncore_mhz(int package, int die)
+{
+	char path[128];
+
+	sprintf(path, "/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/current_freq_khz", package,
+		die);
+
+	return (snapshot_sysfs_counter(path) / 1000);
+}
+
 int get_epb(int cpu)
 {
 	char path[128 + PATH_BYTES];
@@ -2297,6 +2319,10 @@ int get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
 	if (DO_BIC(BIC_GFX_rc6))
 		p->gfx_rc6_ms = gfx_cur_rc6_ms;
 
+	/* n.b. assume die0 uncore frequency applies to whole package */
+	if (DO_BIC(BIC_UNCORE_MHZ))
+		p->uncore_mhz = get_uncore_mhz(p->package_id, 0);
+
 	if (DO_BIC(BIC_GFXMHz))
 		p->gfx_mhz = gfx_cur_mhz;
 
@@ -4098,6 +4124,24 @@ static void dump_cstate_pstate_config_info(unsigned int family, unsigned int mod
 	dump_nhm_cst_cfg();
 }
 
+static int read_sysfs_int(char *path)
+{
+	FILE *input;
+	int retval = -1;
+
+	input = fopen(path, "r");
+	if (input == NULL) {
+		if (debug)
+			fprintf(outf, "NSFOD %s\n", path);
+		return (-1);
+	}
+	if (fscanf(input, "%d", &retval) != 1)
+		err(1, "%s: failed to read int from file", path);
+	fclose(input);
+
+	return (retval);
+}
+
 static void dump_sysfs_file(char *path)
 {
 	FILE *input;
@@ -4116,6 +4160,48 @@ static void dump_sysfs_file(char *path)
 	fprintf(outf, "%s: %s", strrchr(path, '/') + 1, cpuidle_buf);
 }
 
+static void intel_uncore_frequency_probe(void)
+{
+	int i, j;
+	char path[128];
+
+	if (!genuine_intel)
+		return;
+
+	if (access("/sys/devices/system/cpu/intel_uncore_frequency/package_00_die_00", R_OK))
+		return;
+
+	if (!access("/sys/devices/system/cpu/intel_uncore_frequency/package_00_die_00/current_freq_khz", R_OK))
+		BIC_PRESENT(BIC_UNCORE_MHZ);
+
+	if (quiet)
+		return;
+
+	for (i = 0; i < topo.num_packages; ++i) {
+		for (j = 0; j < topo.num_die; ++j) {
+			int k, l;
+
+			sprintf(path, "/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/min_freq_khz",
+				i, j);
+			k = read_sysfs_int(path);
+			sprintf(path, "/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/max_freq_khz",
+				i, j);
+			l = read_sysfs_int(path);
+			fprintf(outf, "Uncore Frequency pkg%d die%d: %d - %d MHz ", i, j, k / 1000, l / 1000);
+
+			sprintf(path,
+				"/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/initial_min_freq_khz",
+				i, j);
+			k = read_sysfs_int(path);
+			sprintf(path,
+				"/sys/devices/system/cpu/intel_uncore_frequency/package_0%d_die_0%d/initial_max_freq_khz",
+				i, j);
+			l = read_sysfs_int(path);
+			fprintf(outf, "(%d - %d MHz)\n", k / 1000, l / 1000);
+		}
+	}
+}
+
 static void dump_sysfs_cstate_config(void)
 {
 	char path[64];
@@ -5700,6 +5786,7 @@ void process_cpuid()
 
 	if (!quiet)
 		dump_cstate_pstate_config_info(family, model);
+	intel_uncore_frequency_probe();
 
 	if (!quiet)
 		print_dev_latency();