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hmp: add filtering of statistics by provider

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Allow the user to request statistics for a single provider of interest.
Extracted from a patch by Mark Kanda.

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2022-04-26 13:58:59 +02:00
parent 068cc51d42
commit 7716417eac
2 changed files with 36 additions and 10 deletions
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7
hmp-commands-info.hx
View file

@ -897,9 +897,10 @@ ERST
{
.name = "stats",
.args_type = "target:s",
.params = "target",
.help = "show statistics; target is either vm or vcpu",
.args_type = "target:s,provider:s?",
.params = "target [provider]",
.help = "show statistics for the given target (vm or vcpu); optionally filter by "
"provider",
.cmd = hmp_info_stats,
},

39
monitor/hmp-cmds.c
View file

@ -2300,6 +2300,7 @@ static StatsSchemaValueList *find_schema_value_list(
}
static void print_stats_results(Monitor *mon, StatsTarget target,
bool show_provider,
StatsResult *result,
StatsSchemaList *schema)
{
@ -2314,8 +2315,10 @@ static void print_stats_results(Monitor *mon, StatsTarget target,
return;
}
monitor_printf(mon, "provider: %s\n",
StatsProvider_str(result->provider));
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,
@ -2356,7 +2359,8 @@ static void print_stats_results(Monitor *mon, StatsTarget target,
}
/* Create the StatsFilter that is needed for an "info stats" invocation. */
static StatsFilter *stats_filter(StatsTarget target, int cpu_index)
static StatsFilter *stats_filter(StatsTarget target, int cpu_index,
StatsProvider provider)
{
StatsFilter *filter = g_malloc0(sizeof(*filter));
@ -2378,12 +2382,25 @@ static StatsFilter *stats_filter(StatsTarget target, int cpu_index)
default:
break;
}
if (provider == STATS_PROVIDER__MAX) {
return filter;
}
/* "info stats" can only query either one or all the providers. */
filter->has_providers = true;
filter->providers = g_new0(StatsRequestList, 1);
filter->providers->value = g_new0(StatsRequest, 1);
filter->providers->value->provider = provider;
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");
StatsProvider provider = STATS_PROVIDER__MAX;
StatsTarget target;
Error *err = NULL;
g_autoptr(StatsSchemaList) schema = NULL;
@ -2396,19 +2413,27 @@ void hmp_info_stats(Monitor *mon, const QDict *qdict)
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(false, STATS_PROVIDER__MAX, &err);
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, -1);
filter = stats_filter(target, -1, provider);
break;
case STATS_TARGET_VCPU: {}
int cpu_index = monitor_get_cpu_index(mon);
filter = stats_filter(target, cpu_index);
filter = stats_filter(target, cpu_index, provider);
break;
default:
abort();
@ -2419,7 +2444,7 @@ void hmp_info_stats(Monitor *mon, const QDict *qdict)
goto exit;
}
for (entry = stats; entry; entry = entry->next) {
print_stats_results(mon, target, entry->value, schema);
print_stats_results(mon, target, provider_str == NULL, entry->value, schema);
}
exit: