tools/power turbostat: decode HWP registers

 # turbostat --debug
...
CPUID(6): ... HWP, HWPnotify, HWPwindow, HWPepp, HWPpkg ...
...
cpu0: MSR_PM_ENABLE: 0x00000001 (HWP)
cpu0: MSR_HWP_CAPABILITIES: 0x01050916 (high 0x16 guar 0x9 eff 0x5 low 0x1)
cpu0: MSR_HWP_REQUEST: 0x80001604 (min 0x4 max 0x16 des 0x0 epp 0x80 window 0x0 pkg 0x0)
cpu0: MSR_HWP_INTERRUPT: 0x00000001 (EN_Guaranteed_Perf_Change, Dis_Excursion_Min)
cpu0: MSR_HWP_STATUS: 0x00000000 (No-Guaranteed_Perf_Change, No-Excursion_Min)

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 4c4470f3ac655168867b2ef9f5d615282be6deba..af3b955aad1d897a0eeb849dceb8de310b622f47 100644 (file)
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -98,6 +98,12 @@ unsigned int crystal_hz;
 unsigned long long tsc_hz;
 int base_cpu;
 double discover_bclk(unsigned int family, unsigned int model);
+unsigned int has_hwp;  /* IA32_PM_ENABLE, IA32_HWP_CAPABILITIES */
+                       /* IA32_HWP_REQUEST, IA32_HWP_STATUS */
+unsigned int has_hwp_notify;           /* IA32_HWP_INTERRUPT */
+unsigned int has_hwp_activity_window;  /* IA32_HWP_REQUEST[bits 41:32] */
+unsigned int has_hwp_epp;              /* IA32_HWP_REQUEST[bits 31:24] */
+unsigned int has_hwp_pkg;              /* IA32_HWP_REQUEST_PKG */
 
 #define RAPL_PKG               (1 << 0)
                                        /* 0x610 MSR_PKG_POWER_LIMIT */
@@ -2041,6 +2047,97 @@ int print_epb(struct thread_data *t, struct core_data *c, struct pkg_data *p)
 
        return 0;
 }
+/*
+ * print_hwp()
+ * Decode the MSR_HWP_CAPABILITIES
+ */
+int print_hwp(struct thread_data *t, struct core_data *c, struct pkg_data *p)
+{
+       unsigned long long msr;
+       int cpu;
+
+       if (!has_hwp)
+               return 0;
+
+       cpu = t->cpu_id;
+
+       /* MSR_HWP_CAPABILITIES is per-package */
+       if (!(t->flags & CPU_IS_FIRST_THREAD_IN_CORE) || !(t->flags & CPU_IS_FIRST_CORE_IN_PACKAGE))
+               return 0;
+
+       if (cpu_migrate(cpu)) {
+               fprintf(stderr, "Could not migrate to CPU %d\n", cpu);
+               return -1;
+       }
+
+       if (get_msr(cpu, MSR_PM_ENABLE, &msr))
+               return 0;
+
+       fprintf(stderr, "cpu%d: MSR_PM_ENABLE: 0x%08llx (%sHWP)\n",
+               cpu, msr, (msr & (1 << 0)) ? "" : "No-");
+
+       /* MSR_PM_ENABLE[1] == 1 if HWP is enabled and MSRs visible */
+       if ((msr & (1 << 0)) == 0)
+               return 0;
+
+       if (get_msr(cpu, MSR_HWP_CAPABILITIES, &msr))
+               return 0;
+
+       fprintf(stderr, "cpu%d: MSR_HWP_CAPABILITIES: 0x%08llx "
+                       "(high 0x%x guar 0x%x eff 0x%x low 0x%x)\n",
+                       cpu, msr,
+                       (unsigned int)HWP_HIGHEST_PERF(msr),
+                       (unsigned int)HWP_GUARANTEED_PERF(msr),
+                       (unsigned int)HWP_MOSTEFFICIENT_PERF(msr),
+                       (unsigned int)HWP_LOWEST_PERF(msr));
+
+       if (get_msr(cpu, MSR_HWP_REQUEST, &msr))
+               return 0;
+
+       fprintf(stderr, "cpu%d: MSR_HWP_REQUEST: 0x%08llx "
+                       "(min 0x%x max 0x%x des 0x%x epp 0x%x window 0x%x pkg 0x%x)\n",
+                       cpu, msr,
+                       (unsigned int)(((msr) >> 0) & 0xff),
+                       (unsigned int)(((msr) >> 8) & 0xff),
+                       (unsigned int)(((msr) >> 16) & 0xff),
+                       (unsigned int)(((msr) >> 24) & 0xff),
+                       (unsigned int)(((msr) >> 32) & 0xff3),
+                       (unsigned int)(((msr) >> 42) & 0x1));
+
+       if (has_hwp_pkg) {
+               if (get_msr(cpu, MSR_HWP_REQUEST_PKG, &msr))
+                       return 0;
+
+               fprintf(stderr, "cpu%d: MSR_HWP_REQUEST_PKG: 0x%08llx "
+                       "(min 0x%x max 0x%x des 0x%x epp 0x%x window 0x%x)\n",
+                       cpu, msr,
+                       (unsigned int)(((msr) >> 0) & 0xff),
+                       (unsigned int)(((msr) >> 8) & 0xff),
+                       (unsigned int)(((msr) >> 16) & 0xff),
+                       (unsigned int)(((msr) >> 24) & 0xff),
+                       (unsigned int)(((msr) >> 32) & 0xff3));
+       }
+       if (has_hwp_notify) {
+               if (get_msr(cpu, MSR_HWP_INTERRUPT, &msr))
+                       return 0;
+
+               fprintf(stderr, "cpu%d: MSR_HWP_INTERRUPT: 0x%08llx "
+                       "(%s_Guaranteed_Perf_Change, %s_Excursion_Min)\n",
+                       cpu, msr,
+                       ((msr) & 0x1) ? "EN" : "Dis",
+                       ((msr) & 0x2) ? "EN" : "Dis");
+       }
+       if (get_msr(cpu, MSR_HWP_STATUS, &msr))
+               return 0;
+
+       fprintf(stderr, "cpu%d: MSR_HWP_STATUS: 0x%08llx "
+                       "(%sGuaranteed_Perf_Change, %sExcursion_Min)\n",
+                       cpu, msr,
+                       ((msr) & 0x1) ? "" : "No-",
+                       ((msr) & 0x2) ? "" : "No-");
+
+       return 0;
+}
 
 /*
  * print_perf_limit()
@@ -2686,6 +2783,7 @@ void decode_misc_enable_msr(void)
                        msr & (1 << 18) ? "MONITOR" : "");
 }
 
+
 void process_cpuid()
 {
        unsigned int eax, ebx, ecx, edx, max_level, max_extended_level;
@@ -2753,14 +2851,25 @@ void process_cpuid()
        has_aperf = ecx & (1 << 0);
        do_dts = eax & (1 << 0);
        do_ptm = eax & (1 << 6);
+       has_hwp = eax & (1 << 7);
+       has_hwp_notify = eax & (1 << 8);
+       has_hwp_activity_window = eax & (1 << 9);
+       has_hwp_epp = eax & (1 << 10);
+       has_hwp_pkg = eax & (1 << 11);
        has_epb = ecx & (1 << 3);
 
        if (debug)
-               fprintf(stderr, "CPUID(6): %sAPERF, %sDTS, %sPTM, %sEPB\n",
-                       has_aperf ? "" : "No ",
-                       do_dts ? "" : "No ",
-                       do_ptm ? "" : "No ",
-                       has_epb ? "" : "No ");
+               fprintf(stderr, "CPUID(6): %sAPERF, %sDTS, %sPTM, %sHWP, "
+                       "%sHWPnotify, %sHWPwindow, %sHWPepp, %sHWPpkg, %sEPB\n",
+                       has_aperf ? "" : "No-",
+                       do_dts ? "" : "No-",
+                       do_ptm ? "" : "No-",
+                       has_hwp ? "" : "No-",
+                       has_hwp_notify ? "" : "No-",
+                       has_hwp_activity_window ? "" : "No-",
+                       has_hwp_epp ? "" : "No-",
+                       has_hwp_pkg ? "" : "No-",
+                       has_epb ? "" : "No-");
 
        if (debug)
                decode_misc_enable_msr();
@@ -3087,6 +3196,9 @@ void turbostat_init()
        process_cpuid();
 
 
+       if (debug)
+               for_all_cpus(print_hwp, ODD_COUNTERS);
+
        if (debug)
                for_all_cpus(print_epb, ODD_COUNTERS);
 
@@ -3164,7 +3276,7 @@ int get_and_dump_counters(void)
 }
 
 void print_version() {
-       fprintf(stderr, "turbostat version 4.9 22 Nov, 2015"
+       fprintf(stderr, "turbostat version 4.10 10 Dec, 2015"
                " - Len Brown <lenb@kernel.org>\n");
 }