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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 | // SPDX-License-Identifier: GPL-2.0-only /* * (C) 2010,2011 Thomas Renninger <trenn@suse.de>, Novell Inc. * * Based on Len Brown's <lenb@kernel.org> turbostat tool. */ #if defined(__i386__) || defined(__x86_64__) #include <stdio.h> #include <stdint.h> #include <stdlib.h> #include <string.h> #include "helpers/helpers.h" #include "idle_monitor/cpupower-monitor.h" #define MSR_PKG_C2_RESIDENCY 0x60D #define MSR_PKG_C7_RESIDENCY 0x3FA #define MSR_CORE_C7_RESIDENCY 0x3FE #define MSR_TSC 0x10 enum intel_snb_id { C7 = 0, PC2, PC7, SNB_CSTATE_COUNT, TSC = 0xFFFF }; static int snb_get_count_percent(unsigned int self_id, double *percent, unsigned int cpu); static cstate_t snb_cstates[SNB_CSTATE_COUNT] = { { .name = "C7", .desc = N_("Processor Core C7"), .id = C7, .range = RANGE_CORE, .get_count_percent = snb_get_count_percent, }, { .name = "PC2", .desc = N_("Processor Package C2"), .id = PC2, .range = RANGE_PACKAGE, .get_count_percent = snb_get_count_percent, }, { .name = "PC7", .desc = N_("Processor Package C7"), .id = PC7, .range = RANGE_PACKAGE, .get_count_percent = snb_get_count_percent, }, }; static unsigned long long tsc_at_measure_start; static unsigned long long tsc_at_measure_end; static unsigned long long *previous_count[SNB_CSTATE_COUNT]; static unsigned long long *current_count[SNB_CSTATE_COUNT]; /* valid flag for all CPUs. If a MSR read failed it will be zero */ static int *is_valid; static int snb_get_count(enum intel_snb_id id, unsigned long long *val, unsigned int cpu) { int msr; switch (id) { case C7: msr = MSR_CORE_C7_RESIDENCY; break; case PC2: msr = MSR_PKG_C2_RESIDENCY; break; case PC7: msr = MSR_PKG_C7_RESIDENCY; break; case TSC: msr = MSR_TSC; break; default: return -1; } if (read_msr(cpu, msr, val)) return -1; return 0; } static int snb_get_count_percent(unsigned int id, double *percent, unsigned int cpu) { *percent = 0.0; if (!is_valid[cpu]) return -1; *percent = (100.0 * (current_count[id][cpu] - previous_count[id][cpu])) / (tsc_at_measure_end - tsc_at_measure_start); dprint("%s: previous: %llu - current: %llu - (%u)\n", snb_cstates[id].name, previous_count[id][cpu], current_count[id][cpu], cpu); dprint("%s: tsc_diff: %llu - count_diff: %llu - percent: %2.f (%u)\n", snb_cstates[id].name, (unsigned long long) tsc_at_measure_end - tsc_at_measure_start, current_count[id][cpu] - previous_count[id][cpu], *percent, cpu); return 0; } static int snb_start(void) { int num, cpu; unsigned long long val; for (num = 0; num < SNB_CSTATE_COUNT; num++) { for (cpu = 0; cpu < cpu_count; cpu++) { snb_get_count(num, &val, cpu); previous_count[num][cpu] = val; } } snb_get_count(TSC, &tsc_at_measure_start, base_cpu); return 0; } static int snb_stop(void) { unsigned long long val; int num, cpu; snb_get_count(TSC, &tsc_at_measure_end, base_cpu); for (num = 0; num < SNB_CSTATE_COUNT; num++) { for (cpu = 0; cpu < cpu_count; cpu++) { is_valid[cpu] = !snb_get_count(num, &val, cpu); current_count[num][cpu] = val; } } return 0; } struct cpuidle_monitor intel_snb_monitor; static struct cpuidle_monitor *snb_register(void) { int num; if (cpupower_cpu_info.vendor != X86_VENDOR_INTEL || cpupower_cpu_info.family != 6) return NULL; switch (cpupower_cpu_info.model) { case 0x2A: /* SNB */ case 0x2D: /* SNB Xeon */ case 0x3A: /* IVB */ case 0x3E: /* IVB Xeon */ case 0x3C: /* HSW */ case 0x3F: /* HSW */ case 0x45: /* HSW */ case 0x46: /* HSW */ break; default: return NULL; } is_valid = calloc(cpu_count, sizeof(int)); for (num = 0; num < SNB_CSTATE_COUNT; num++) { previous_count[num] = calloc(cpu_count, sizeof(unsigned long long)); current_count[num] = calloc(cpu_count, sizeof(unsigned long long)); } intel_snb_monitor.name_len = strlen(intel_snb_monitor.name); return &intel_snb_monitor; } void snb_unregister(void) { int num; free(is_valid); for (num = 0; num < SNB_CSTATE_COUNT; num++) { free(previous_count[num]); free(current_count[num]); } } struct cpuidle_monitor intel_snb_monitor = { .name = "SandyBridge", .hw_states = snb_cstates, .hw_states_num = SNB_CSTATE_COUNT, .start = snb_start, .stop = snb_stop, .do_register = snb_register, .unregister = snb_unregister, .flags.needs_root = 1, .overflow_s = 922000000 /* 922337203 seconds TSC overflow at 20GHz */ }; #endif /* defined(__i386__) || defined(__x86_64__) */ |