1 /* 2 * HMP commands related to stats 3 * 4 * This work is licensed under the terms of the GNU GPL, version 2 or 5 * (at your option) any later version. 6 */ 7 8 #include "qemu/osdep.h" 9 #include "qapi/qapi-commands-stats.h" 10 #include "monitor/hmp.h" 11 #include "monitor/monitor.h" 12 #include "qemu/cutils.h" 13 #include "hw/core/cpu.h" 14 #include "qapi/qmp/qdict.h" 15 #include "qapi/error.h" 16 17 static void print_stats_schema_value(Monitor *mon, StatsSchemaValue *value) 18 { 19 const char *unit = NULL; 20 monitor_printf(mon, " %s (%s%s", value->name, StatsType_str(value->type), 21 value->has_unit || value->exponent ? ", " : ""); 22 23 if (value->has_unit) { 24 if (value->unit == STATS_UNIT_SECONDS) { 25 unit = "s"; 26 } else if (value->unit == STATS_UNIT_BYTES) { 27 unit = "B"; 28 } 29 } 30 31 if (unit && value->base == 10 && 32 value->exponent >= -18 && value->exponent <= 18 && 33 value->exponent % 3 == 0) { 34 monitor_puts(mon, si_prefix(value->exponent)); 35 } else if (unit && value->base == 2 && 36 value->exponent >= 0 && value->exponent <= 60 && 37 value->exponent % 10 == 0) { 38 39 monitor_puts(mon, iec_binary_prefix(value->exponent)); 40 } else if (value->exponent) { 41 /* Use exponential notation and write the unit's English name */ 42 monitor_printf(mon, "* %d^%d%s", 43 value->base, value->exponent, 44 value->has_unit ? " " : ""); 45 unit = NULL; 46 } 47 48 if (value->has_unit) { 49 monitor_puts(mon, unit ? unit : StatsUnit_str(value->unit)); 50 } 51 52 /* Print bucket size for linear histograms */ 53 if (value->type == STATS_TYPE_LINEAR_HISTOGRAM && value->has_bucket_size) { 54 monitor_printf(mon, ", bucket size=%d", value->bucket_size); 55 } 56 monitor_printf(mon, ")"); 57 } 58 59 static StatsSchemaValueList *find_schema_value_list( 60 StatsSchemaList *list, StatsProvider provider, 61 StatsTarget target) 62 { 63 StatsSchemaList *node; 64 65 for (node = list; node; node = node->next) { 66 if (node->value->provider == provider && 67 node->value->target == target) { 68 return node->value->stats; 69 } 70 } 71 return NULL; 72 } 73 74 static void print_stats_results(Monitor *mon, StatsTarget target, 75 bool show_provider, 76 StatsResult *result, 77 StatsSchemaList *schema) 78 { 79 /* Find provider schema */ 80 StatsSchemaValueList *schema_value_list = 81 find_schema_value_list(schema, result->provider, target); 82 StatsList *stats_list; 83 84 if (!schema_value_list) { 85 monitor_printf(mon, "failed to find schema list for %s\n", 86 StatsProvider_str(result->provider)); 87 return; 88 } 89 90 if (show_provider) { 91 monitor_printf(mon, "provider: %s\n", 92 StatsProvider_str(result->provider)); 93 } 94 95 for (stats_list = result->stats; stats_list; 96 stats_list = stats_list->next, 97 schema_value_list = schema_value_list->next) { 98 99 Stats *stats = stats_list->value; 100 StatsValue *stats_value = stats->value; 101 StatsSchemaValue *schema_value = schema_value_list->value; 102 103 /* Find schema entry */ 104 while (!g_str_equal(stats->name, schema_value->name)) { 105 if (!schema_value_list->next) { 106 monitor_printf(mon, "failed to find schema entry for %s\n", 107 stats->name); 108 return; 109 } 110 schema_value_list = schema_value_list->next; 111 schema_value = schema_value_list->value; 112 } 113 114 print_stats_schema_value(mon, schema_value); 115 116 if (stats_value->type == QTYPE_QNUM) { 117 monitor_printf(mon, ": %" PRId64 "\n", stats_value->u.scalar); 118 } else if (stats_value->type == QTYPE_QBOOL) { 119 monitor_printf(mon, ": %s\n", stats_value->u.boolean ? "yes" : "no"); 120 } else if (stats_value->type == QTYPE_QLIST) { 121 uint64List *list; 122 int i; 123 124 monitor_printf(mon, ": "); 125 for (list = stats_value->u.list, i = 1; 126 list; 127 list = list->next, i++) { 128 monitor_printf(mon, "[%d]=%" PRId64 " ", i, list->value); 129 } 130 monitor_printf(mon, "\n"); 131 } 132 } 133 } 134 135 /* Create the StatsFilter that is needed for an "info stats" invocation. */ 136 static StatsFilter *stats_filter(StatsTarget target, const char *names, 137 int cpu_index, StatsProvider provider) 138 { 139 StatsFilter *filter = g_malloc0(sizeof(*filter)); 140 StatsProvider provider_idx; 141 StatsRequestList *request_list = NULL; 142 143 filter->target = target; 144 switch (target) { 145 case STATS_TARGET_VM: 146 break; 147 case STATS_TARGET_VCPU: 148 { 149 strList *vcpu_list = NULL; 150 CPUState *cpu = qemu_get_cpu(cpu_index); 151 char *canonical_path = object_get_canonical_path(OBJECT(cpu)); 152 153 QAPI_LIST_PREPEND(vcpu_list, canonical_path); 154 filter->u.vcpu.has_vcpus = true; 155 filter->u.vcpu.vcpus = vcpu_list; 156 break; 157 } 158 default: 159 break; 160 } 161 162 if (!names && provider == STATS_PROVIDER__MAX) { 163 return filter; 164 } 165 166 /* 167 * "info stats" can only query either one or all the providers. Querying 168 * by name, but not by provider, requires the creation of one filter per 169 * provider. 170 */ 171 for (provider_idx = 0; provider_idx < STATS_PROVIDER__MAX; provider_idx++) { 172 if (provider == STATS_PROVIDER__MAX || provider == provider_idx) { 173 StatsRequest *request = g_new0(StatsRequest, 1); 174 request->provider = provider_idx; 175 if (names && !g_str_equal(names, "*")) { 176 request->has_names = true; 177 request->names = hmp_split_at_comma(names); 178 } 179 QAPI_LIST_PREPEND(request_list, request); 180 } 181 } 182 183 filter->has_providers = true; 184 filter->providers = request_list; 185 return filter; 186 } 187 188 void hmp_info_stats(Monitor *mon, const QDict *qdict) 189 { 190 const char *target_str = qdict_get_str(qdict, "target"); 191 const char *provider_str = qdict_get_try_str(qdict, "provider"); 192 const char *names = qdict_get_try_str(qdict, "names"); 193 194 StatsProvider provider = STATS_PROVIDER__MAX; 195 StatsTarget target; 196 Error *err = NULL; 197 g_autoptr(StatsSchemaList) schema = NULL; 198 g_autoptr(StatsResultList) stats = NULL; 199 g_autoptr(StatsFilter) filter = NULL; 200 StatsResultList *entry; 201 202 target = qapi_enum_parse(&StatsTarget_lookup, target_str, -1, &err); 203 if (err) { 204 monitor_printf(mon, "invalid stats target %s\n", target_str); 205 goto exit_no_print; 206 } 207 if (provider_str) { 208 provider = qapi_enum_parse(&StatsProvider_lookup, provider_str, -1, &err); 209 if (err) { 210 monitor_printf(mon, "invalid stats provider %s\n", provider_str); 211 goto exit_no_print; 212 } 213 } 214 215 schema = qmp_query_stats_schemas(provider_str ? true : false, 216 provider, &err); 217 if (err) { 218 goto exit; 219 } 220 221 switch (target) { 222 case STATS_TARGET_VM: 223 filter = stats_filter(target, names, -1, provider); 224 break; 225 case STATS_TARGET_VCPU: {} 226 int cpu_index = monitor_get_cpu_index(mon); 227 filter = stats_filter(target, names, cpu_index, provider); 228 break; 229 default: 230 abort(); 231 } 232 233 stats = qmp_query_stats(filter, &err); 234 if (err) { 235 goto exit; 236 } 237 for (entry = stats; entry; entry = entry->next) { 238 print_stats_results(mon, target, provider_str == NULL, entry->value, schema); 239 } 240 241 exit: 242 if (err) { 243 monitor_printf(mon, "%s\n", error_get_pretty(err)); 244 } 245 exit_no_print: 246 error_free(err); 247 } 248