From: Hyman Huang(黄勇) <huang...@chinatelecom.cn> 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) <huang...@chinatelecom.cn> --- 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_STEP 100 #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, &p->vcpu_dirtylimit_period, &err); break; + case MIGRATION_PARAMETER_VCPU_DIRTYLIMIT: + p->has_vcpu_dirtylimit = true; + visit_type_size(v, param, &p->vcpu_dirtylimit, &err); + 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: # @unstable: Member @x-checkpoint-delay is experimental. # @@ -967,7 +974,8 @@ '*multifd-zlib-level': 'uint8', '*multifd-zstd-level': 'uint8', '*block-bitmap-mapping': [ 'BitmapMigrationNodeAlias' ], - '*vcpu-dirtylimit-period': 'uint64'} } + '*vcpu-dirtylimit-period': 'uint64', + '*vcpu-dirtylimit': 'uint64'} } ## # @migrate-set-parameters: @@ -1135,6 +1143,9 @@ # @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. # @@ -1169,7 +1180,8 @@ '*multifd-zlib-level': 'uint8', '*multifd-zstd-level': 'uint8', '*block-bitmap-mapping': [ 'BitmapMigrationNodeAlias' ], - '*vcpu-dirtylimit-period': 'uint64'} } + '*vcpu-dirtylimit-period': 'uint64', + '*vcpu-dirtylimit': 'uint64'} } ## # @query-migrate-parameters: -- 1.8.3.1