diff options
Diffstat (limited to 'stats/stats-hmp-cmds.c')
| -rw-r--r-- | stats/stats-hmp-cmds.c | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/stats/stats-hmp-cmds.c b/stats/stats-hmp-cmds.c new file mode 100644 index 0000000000..531e35d128 --- /dev/null +++ b/stats/stats-hmp-cmds.c @@ -0,0 +1,247 @@ +/* + * HMP commands related to stats + * + * This work is licensed under the terms of the GNU GPL, version 2 or + * (at your option) any later version. + */ + +#include "qemu/osdep.h" +#include "qapi/qapi-commands-stats.h" +#include "monitor/hmp.h" +#include "monitor/monitor.h" +#include "qemu/cutils.h" +#include "hw/core/cpu.h" +#include "qapi/qmp/qdict.h" +#include "qapi/error.h" + +static void print_stats_schema_value(Monitor *mon, StatsSchemaValue *value) +{ + const char *unit = NULL; + monitor_printf(mon, " %s (%s%s", value->name, StatsType_str(value->type), + value->has_unit || value->exponent ? ", " : ""); + + if (value->has_unit) { + if (value->unit == STATS_UNIT_SECONDS) { + unit = "s"; + } else if (value->unit == STATS_UNIT_BYTES) { + unit = "B"; + } + } + + if (unit && value->base == 10 && + value->exponent >= -18 && value->exponent <= 18 && + value->exponent % 3 == 0) { + monitor_puts(mon, si_prefix(value->exponent)); + } else if (unit && value->base == 2 && + value->exponent >= 0 && value->exponent <= 60 && + value->exponent % 10 == 0) { + + monitor_puts(mon, iec_binary_prefix(value->exponent)); + } else if (value->exponent) { + /* Use exponential notation and write the unit's English name */ + monitor_printf(mon, "* %d^%d%s", + value->base, value->exponent, + value->has_unit ? " " : ""); + unit = NULL; + } + + if (value->has_unit) { + monitor_puts(mon, unit ? unit : StatsUnit_str(value->unit)); + } + + /* Print bucket size for linear histograms */ + if (value->type == STATS_TYPE_LINEAR_HISTOGRAM && value->has_bucket_size) { + monitor_printf(mon, ", bucket size=%d", value->bucket_size); + } + monitor_printf(mon, ")"); +} + +static StatsSchemaValueList *find_schema_value_list( + StatsSchemaList *list, StatsProvider provider, + StatsTarget target) +{ + StatsSchemaList *node; + + for (node = list; node; node = node->next) { + if (node->value->provider == provider && + node->value->target == target) { + return node->value->stats; + } + } + return NULL; +} + +static void print_stats_results(Monitor *mon, StatsTarget target, + bool show_provider, + StatsResult *result, + StatsSchemaList *schema) +{ + /* Find provider schema */ + StatsSchemaValueList *schema_value_list = + find_schema_value_list(schema, result->provider, target); + StatsList *stats_list; + + if (!schema_value_list) { + monitor_printf(mon, "failed to find schema list for %s\n", + StatsProvider_str(result->provider)); + return; + } + + if (show_provider) { + monitor_printf(mon, "provider: %s\n", + StatsProvider_str(result->provider)); + } + + for (stats_list = result->stats; stats_list; + stats_list = stats_list->next, + schema_value_list = schema_value_list->next) { + + Stats *stats = stats_list->value; + StatsValue *stats_value = stats->value; + StatsSchemaValue *schema_value = schema_value_list->value; + + /* Find schema entry */ + while (!g_str_equal(stats->name, schema_value->name)) { + if (!schema_value_list->next) { + monitor_printf(mon, "failed to find schema entry for %s\n", + stats->name); + return; + } + schema_value_list = schema_value_list->next; + schema_value = schema_value_list->value; + } + + print_stats_schema_value(mon, schema_value); + + if (stats_value->type == QTYPE_QNUM) { + monitor_printf(mon, ": %" PRId64 "\n", stats_value->u.scalar); + } else if (stats_value->type == QTYPE_QBOOL) { + monitor_printf(mon, ": %s\n", stats_value->u.boolean ? "yes" : "no"); + } else if (stats_value->type == QTYPE_QLIST) { + uint64List *list; + int i; + + monitor_printf(mon, ": "); + for (list = stats_value->u.list, i = 1; + list; + list = list->next, i++) { + monitor_printf(mon, "[%d]=%" PRId64 " ", i, list->value); + } + monitor_printf(mon, "\n"); + } + } +} + +/* Create the StatsFilter that is needed for an "info stats" invocation. */ +static StatsFilter *stats_filter(StatsTarget target, const char *names, + int cpu_index, StatsProvider provider) +{ + StatsFilter *filter = g_malloc0(sizeof(*filter)); + StatsProvider provider_idx; + StatsRequestList *request_list = NULL; + + filter->target = target; + switch (target) { + case STATS_TARGET_VM: + break; + case STATS_TARGET_VCPU: + { + strList *vcpu_list = NULL; + CPUState *cpu = qemu_get_cpu(cpu_index); + char *canonical_path = object_get_canonical_path(OBJECT(cpu)); + + QAPI_LIST_PREPEND(vcpu_list, canonical_path); + filter->u.vcpu.has_vcpus = true; + filter->u.vcpu.vcpus = vcpu_list; + break; + } + default: + break; + } + + if (!names && provider == STATS_PROVIDER__MAX) { + return filter; + } + + /* + * "info stats" can only query either one or all the providers. Querying + * by name, but not by provider, requires the creation of one filter per + * provider. + */ + for (provider_idx = 0; provider_idx < STATS_PROVIDER__MAX; provider_idx++) { + if (provider == STATS_PROVIDER__MAX || provider == provider_idx) { + StatsRequest *request = g_new0(StatsRequest, 1); + request->provider = provider_idx; + if (names && !g_str_equal(names, "*")) { + request->has_names = true; + request->names = hmp_split_at_comma(names); + } + QAPI_LIST_PREPEND(request_list, request); + } + } + + filter->has_providers = true; + filter->providers = request_list; + return filter; +} + +void hmp_info_stats(Monitor *mon, const QDict *qdict) +{ + const char *target_str = qdict_get_str(qdict, "target"); + const char *provider_str = qdict_get_try_str(qdict, "provider"); + const char *names = qdict_get_try_str(qdict, "names"); + + StatsProvider provider = STATS_PROVIDER__MAX; + StatsTarget target; + Error *err = NULL; + g_autoptr(StatsSchemaList) schema = NULL; + g_autoptr(StatsResultList) stats = NULL; + g_autoptr(StatsFilter) filter = NULL; + StatsResultList *entry; + + target = qapi_enum_parse(&StatsTarget_lookup, target_str, -1, &err); + if (err) { + monitor_printf(mon, "invalid stats target %s\n", target_str); + goto exit_no_print; + } + if (provider_str) { + provider = qapi_enum_parse(&StatsProvider_lookup, provider_str, -1, &err); + if (err) { + monitor_printf(mon, "invalid stats provider %s\n", provider_str); + goto exit_no_print; + } + } + + schema = qmp_query_stats_schemas(provider_str ? true : false, + provider, &err); + if (err) { + goto exit; + } + + switch (target) { + case STATS_TARGET_VM: + filter = stats_filter(target, names, -1, provider); + break; + case STATS_TARGET_VCPU: {} + int cpu_index = monitor_get_cpu_index(mon); + filter = stats_filter(target, names, cpu_index, provider); + break; + default: + abort(); + } + + stats = qmp_query_stats(filter, &err); + if (err) { + goto exit; + } + for (entry = stats; entry; entry = entry->next) { + print_stats_results(mon, target, provider_str == NULL, entry->value, schema); + } + +exit: + if (err) { + monitor_printf(mon, "%s\n", error_get_pretty(err)); + } +exit_no_print: + error_free(err); +} |