From: Hyman Huang(黄勇)
Introduce "vcpu-dirtylimit" migration parameter used
to limit dirty page rate during live migration.
"vcpu-dirtylimit" and "vcpu-dirtylimit-period" are
two dirtylimit-related migration parameters, which can
be set before and during live migration by qmp
migrate-set-parameters.
This two parameters are used to help implement the dirty
page rate limit algo of migration.
Signed-off-by: Hyman Huang(黄勇)
---
migration/migration.c | 13 +
monitor/hmp-cmds.c| 7 +++
qapi/migration.json | 18 +++---
3 files changed, 35 insertions(+), 3 deletions(-)
diff --git a/migration/migration.c b/migration/migration.c
index 5e20b2a..9e4ce01 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -117,6 +117,7 @@
#define DEFAULT_MIGRATE_ANNOUNCE_STEP100
#define DEFAULT_MIGRATE_VCPU_DIRTYLIMIT_PERIOD 500 /* ms */
+#define DEFAULT_MIGRATE_VCPU_DIRTYLIMIT 1 /* MB/s */
static NotifierList migration_state_notifiers =
NOTIFIER_LIST_INITIALIZER(migration_state_notifiers);
@@ -925,6 +926,8 @@ MigrationParameters *qmp_query_migrate_parameters(Error
**errp)
params->has_vcpu_dirtylimit_period = true;
params->vcpu_dirtylimit_period = s->parameters.vcpu_dirtylimit_period;
+params->has_vcpu_dirtylimit = true;
+params->vcpu_dirtylimit = s->parameters.vcpu_dirtylimit;
return params;
}
@@ -1590,6 +1593,10 @@ static void
migrate_params_test_apply(MigrateSetParameters *params,
if (params->has_vcpu_dirtylimit_period) {
dest->vcpu_dirtylimit_period = params->vcpu_dirtylimit_period;
}
+
+if (params->has_vcpu_dirtylimit) {
+dest->vcpu_dirtylimit = params->vcpu_dirtylimit;
+}
}
static void migrate_params_apply(MigrateSetParameters *params, Error **errp)
@@ -1715,6 +1722,9 @@ static void migrate_params_apply(MigrateSetParameters
*params, Error **errp)
if (params->has_vcpu_dirtylimit_period) {
s->parameters.vcpu_dirtylimit_period = params->vcpu_dirtylimit_period;
}
+if (params->has_vcpu_dirtylimit) {
+s->parameters.vcpu_dirtylimit = params->vcpu_dirtylimit;
+}
}
void qmp_migrate_set_parameters(MigrateSetParameters *params, Error **errp)
@@ -4241,6 +4251,9 @@ static Property migration_properties[] = {
DEFINE_PROP_UINT64("vcpu-dirtylimit-period", MigrationState,
parameters.vcpu_dirtylimit_period,
DEFAULT_MIGRATE_VCPU_DIRTYLIMIT_PERIOD),
+DEFINE_PROP_UINT64("vcpu-dirtylimit", MigrationState,
+ parameters.vcpu_dirtylimit,
+ DEFAULT_MIGRATE_VCPU_DIRTYLIMIT),
/* Migration capabilities */
DEFINE_PROP_MIG_CAP("x-xbzrle", MIGRATION_CAPABILITY_XBZRLE),
diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c
index fa33a35..31a0564 100644
--- a/monitor/hmp-cmds.c
+++ b/monitor/hmp-cmds.c
@@ -529,6 +529,9 @@ void hmp_info_migrate_parameters(Monitor *mon, const QDict
*qdict)
monitor_printf(mon, "%s: %" PRIu64 " MB/s\n",
MigrationParameter_str(MIGRATION_PARAMETER_VCPU_DIRTYLIMIT_PERIOD),
params->vcpu_dirtylimit_period);
+monitor_printf(mon, "%s: %" PRIu64 " MB/s\n",
+MigrationParameter_str(MIGRATION_PARAMETER_VCPU_DIRTYLIMIT),
+params->vcpu_dirtylimit);
}
qapi_free_MigrationParameters(params);
@@ -1352,6 +1355,10 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict
*qdict)
p->has_vcpu_dirtylimit_period = true;
visit_type_size(v, param, >vcpu_dirtylimit_period, );
break;
+case MIGRATION_PARAMETER_VCPU_DIRTYLIMIT:
+p->has_vcpu_dirtylimit = true;
+visit_type_size(v, param, >vcpu_dirtylimit, );
+break;
default:
assert(0);
}
diff --git a/qapi/migration.json b/qapi/migration.json
index 260fb66..68c1fe0 100644
--- a/qapi/migration.json
+++ b/qapi/migration.json
@@ -763,6 +763,9 @@
# @vcpu-dirtylimit-period: Periodic time (ms) of dirtylimit during live
migration.
# Defaults to 500ms. (Since 7.0)
#
+# @vcpu-dirtylimit: Dirtyrate limit (MB/s) during live migration.
+# Defaults to 1. (Since 7.0)
+#
# Features:
# @unstable: Member @x-checkpoint-delay is experimental.
#
@@ -783,7 +786,8 @@
'xbzrle-cache-size', 'max-postcopy-bandwidth',
'max-cpu-throttle', 'multifd-compression',
'multifd-zlib-level', 'multifd-zstd-level',
- 'block-bitmap-mapping', 'vcpu-dirtylimit-period'] }
+ 'block-bitmap-mapping', 'vcpu-dirtylimit-period',
+ 'vcpu-dirtylimit'] }
##
# @MigrateSetParameters:
@@ -931,6 +935,9 @@
# @vcpu-dirtylimit-period: Periodic time (ms) of dirtylimit during live
migration.
# Defaults to 500ms. (Since 7.0)
#
+# @vcpu-dirtylimit: Dirtyrate limit (MB/s) during live migration.
+# Defaults to 1. (Since 7.0)
+#
# Features:
#
