cpupower: Add function to print AMD P-State performance capabilities

AMD P-State kernel module is using the fine grain frequency instead of acpi hardware pstate. So add a function to print performance and frequency values. Signed-off-by: Huang Rui <ray.huang@amd.com>
xanmod · Feb 23, 2022 · 9cee634 · 9cee634
1 parent 06778cd
commit 9cee634
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Showing 3 changed files with 40 additions and 3 deletions.
diff --git a/tools/power/cpupower/utils/cpufreq-info.c b/tools/power/cpupower/utils/cpufreq-info.c
@@ -146,9 +146,12 @@ static int get_boost_mode_x86(unsigned int cpu)
 	printf(_("    Supported: %s\n"), support ? _("yes") : _("no"));
 	printf(_("    Active: %s\n"), active ? _("yes") : _("no"));
 
-	if ((cpupower_cpu_info.vendor == X86_VENDOR_AMD &&
-	     cpupower_cpu_info.family >= 0x10) ||
-	     cpupower_cpu_info.vendor == X86_VENDOR_HYGON) {
+	if (cpupower_cpu_info.vendor == X86_VENDOR_AMD &&
+	    cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATE) {
+		return 0;
+	} else if ((cpupower_cpu_info.vendor == X86_VENDOR_AMD &&
+		    cpupower_cpu_info.family >= 0x10) ||
+		   cpupower_cpu_info.vendor == X86_VENDOR_HYGON) {
 		ret = decode_pstates(cpu, b_states, pstates, &pstate_no);
 		if (ret)
 			return ret;

diff --git a/tools/power/cpupower/utils/helpers/amd.c b/tools/power/cpupower/utils/helpers/amd.c
@@ -193,5 +193,34 @@ void amd_pstate_boost_init(unsigned int cpu, int *support, int *active)
 	*active = cpuinfo_max == amd_pstate_max ? 1 : 0;
 }
 
+void amd_pstate_show_perf_and_freq(unsigned int cpu, int no_rounding)
+{
+	printf(_("    AMD PSTATE Highest Performance: %lu. Maximum Frequency: "),
+	       amd_pstate_get_data(cpu, AMD_PSTATE_HIGHEST_PERF));
+	/*
+	 * If boost isn't active, the cpuinfo_max doesn't indicate real max
+	 * frequency. So we read it back from amd-pstate sysfs entry.
+	 */
+	print_speed(amd_pstate_get_data(cpu, AMD_PSTATE_MAX_FREQ), no_rounding);
+	printf(".\n");
+
+	printf(_("    AMD PSTATE Nominal Performance: %lu. Nominal Frequency: "),
+	       acpi_cppc_get_data(cpu, NOMINAL_PERF));
+	print_speed(acpi_cppc_get_data(cpu, NOMINAL_FREQ) * 1000,
+		    no_rounding);
+	printf(".\n");
+
+	printf(_("    AMD PSTATE Lowest Non-linear Performance: %lu. Lowest Non-linear Frequency: "),
+	       acpi_cppc_get_data(cpu, LOWEST_NONLINEAR_PERF));
+	print_speed(amd_pstate_get_data(cpu, AMD_PSTATE_LOWEST_NONLINEAR_FREQ),
+		    no_rounding);
+	printf(".\n");
+
+	printf(_("    AMD PSTATE Lowest Performance: %lu. Lowest Frequency: "),
+	       acpi_cppc_get_data(cpu, LOWEST_PERF));
+	print_speed(acpi_cppc_get_data(cpu, LOWEST_FREQ) * 1000, no_rounding);
+	printf(".\n");
+}
+
 /* AMD P-State Helper Functions ************************************/
 #endif /* defined(__i386__) || defined(__x86_64__) */
diff --git a/tools/power/cpupower/utils/helpers/helpers.h b/tools/power/cpupower/utils/helpers/helpers.h
@@ -142,6 +142,8 @@ extern int cpufreq_has_boost_support(unsigned int cpu, int *support,
 bool cpupower_amd_pstate_enabled(void);
 void amd_pstate_boost_init(unsigned int cpu,
 			   int *support, int *active);
+void amd_pstate_show_perf_and_freq(unsigned int cpu,
+				   int no_rounding);
 
 /* AMD P-State stuff **************************/
 
@@ -182,6 +184,9 @@ static inline bool cpupower_amd_pstate_enabled(void)
 static inline void amd_pstate_boost_init(unsigned int cpu, int *support,
 					 int *active)
 {}
+static inline void amd_pstate_show_perf_and_freq(unsigned int cpu,
+						 int no_rounding)
+{}
 
 /* cpuid and cpuinfo helpers  **************************/