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
print_stats_schema_value(Monitor * mon,StatsSchemaValue * value)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
find_schema_value_list(StatsSchemaList * list,StatsProvider provider,StatsTarget target)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
print_stats_results(Monitor * mon,StatsTarget target,bool show_provider,StatsResult * result,StatsSchemaList * schema)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. */
stats_filter(StatsTarget target,const char * names,int cpu_index,StatsProvider provider)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 case STATS_TARGET_CRYPTODEV:
159 break;
160 default:
161 break;
162 }
163
164 if (!names && provider == STATS_PROVIDER__MAX) {
165 return filter;
166 }
167
168 /*
169 * "info stats" can only query either one or all the providers. Querying
170 * by name, but not by provider, requires the creation of one filter per
171 * provider.
172 */
173 for (provider_idx = 0; provider_idx < STATS_PROVIDER__MAX; provider_idx++) {
174 if (provider == STATS_PROVIDER__MAX || provider == provider_idx) {
175 StatsRequest *request = g_new0(StatsRequest, 1);
176 request->provider = provider_idx;
177 if (names && !g_str_equal(names, "*")) {
178 request->has_names = true;
179 request->names = hmp_split_at_comma(names);
180 }
181 QAPI_LIST_PREPEND(request_list, request);
182 }
183 }
184
185 filter->has_providers = true;
186 filter->providers = request_list;
187 return filter;
188 }
189
hmp_info_stats(Monitor * mon,const QDict * qdict)190 void hmp_info_stats(Monitor *mon, const QDict *qdict)
191 {
192 const char *target_str = qdict_get_str(qdict, "target");
193 const char *provider_str = qdict_get_try_str(qdict, "provider");
194 const char *names = qdict_get_try_str(qdict, "names");
195
196 StatsProvider provider = STATS_PROVIDER__MAX;
197 StatsTarget target;
198 Error *err = NULL;
199 g_autoptr(StatsSchemaList) schema = NULL;
200 g_autoptr(StatsResultList) stats = NULL;
201 g_autoptr(StatsFilter) filter = NULL;
202 StatsResultList *entry;
203
204 target = qapi_enum_parse(&StatsTarget_lookup, target_str, -1, &err);
205 if (err) {
206 monitor_printf(mon, "invalid stats target %s\n", target_str);
207 goto exit_no_print;
208 }
209 if (provider_str) {
210 provider = qapi_enum_parse(&StatsProvider_lookup, provider_str, -1, &err);
211 if (err) {
212 monitor_printf(mon, "invalid stats provider %s\n", provider_str);
213 goto exit_no_print;
214 }
215 }
216
217 schema = qmp_query_stats_schemas(provider_str ? true : false,
218 provider, &err);
219 if (err) {
220 goto exit;
221 }
222
223 switch (target) {
224 case STATS_TARGET_VM:
225 filter = stats_filter(target, names, -1, provider);
226 break;
227 case STATS_TARGET_VCPU: {}
228 int cpu_index = monitor_get_cpu_index(mon);
229 filter = stats_filter(target, names, cpu_index, provider);
230 break;
231 case STATS_TARGET_CRYPTODEV:
232 filter = stats_filter(target, names, -1, provider);
233 break;
234 default:
235 abort();
236 }
237
238 stats = qmp_query_stats(filter, &err);
239 if (err) {
240 goto exit;
241 }
242 for (entry = stats; entry; entry = entry->next) {
243 print_stats_results(mon, target, provider_str == NULL, entry->value, schema);
244 }
245
246 exit:
247 if (err) {
248 monitor_printf(mon, "%s\n", error_get_pretty(err));
249 }
250 exit_no_print:
251 error_free(err);
252 }
253