[PATCH 05/26] qapi/migration: Introduce vcpu-dirty-limit parameters

From: Hyman Huang(黄勇) <yong.huang(a)smartx.com&gt; Introduce "vcpu-dirty-limit" migration parameter used to limit dirty page rate during live migration. "vcpu-dirty-limit" and "x-vcpu-dirty-limit-period" are two dirty-limit-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) <yong.huang(a)smartx.com&gt; Acked-by: Peter Xu <peterx(a)redhat.com&gt; Reviewed-by: Juan Quintela <quintela(a)redhat.com&gt; Message-Id: <168618975839.6361.17407633874747688653-3(a)git.sr.ht&gt; Signed-off-by: Juan Quintela <quintela(a)redhat.com&gt; --- qapi/migration.json | 18 +++++++++++++++--- migration/migration-hmp-cmds.c | 8 ++++++++ migration/options.c | 21 +++++++++++++++++++++ 3 files changed, 44 insertions(+), 3 deletions(-) diff --git a/qapi/migration.json b/qapi/migration.json index 384b768e03..aa590dbf0e 100644 --- a/qapi/migration.json +++ b/qapi/migration.json @@ -793,6 +793,9 @@ # live migration. Should be in the range 1 to 1000ms, # defaults to 1000ms. (Since 8.1) # +# @vcpu-dirty-limit: Dirtyrate limit (MB/s) during live migration. +# Defaults to 1. (Since 8.1) +# # Features: # # @unstable: Members @x-checkpoint-delay and @x-vcpu-dirty-limit-period @@ -816,7 +819,8 @@ 'max-cpu-throttle', 'multifd-compression', 'multifd-zlib-level', 'multifd-zstd-level', 'block-bitmap-mapping', - { 'name': 'x-vcpu-dirty-limit-period', 'features': ['unstable'] } ] } + { 'name': 'x-vcpu-dirty-limit-period', 'features': ['unstable'] }, + 'vcpu-dirty-limit'] } ## # @MigrateSetParameters: @@ -955,6 +959,9 @@ # live migration. Should be in the range 1 to 1000ms, # defaults to 1000ms. (Since 8.1) # +# @vcpu-dirty-limit: Dirtyrate limit (MB/s) during live migration. +# Defaults to 1. (Since 8.1) +# # Features: # # @unstable: Members @x-checkpoint-delay and @x-vcpu-dirty-limit-period @@ -995,7 +1002,8 @@ '*multifd-zstd-level': 'uint8', '*block-bitmap-mapping': [ 'BitmapMigrationNodeAlias' ], '*x-vcpu-dirty-limit-period': { 'type': 'uint64', - 'features': [ 'unstable' ] } } } + 'features': [ 'unstable' ] }, + '*vcpu-dirty-limit': 'uint64'} } ## # @migrate-set-parameters: @@ -1154,6 +1162,9 @@ # live migration. Should be in the range 1 to 1000ms, # defaults to 1000ms. (Since 8.1) # +# @vcpu-dirty-limit: Dirtyrate limit (MB/s) during live migration. +# Defaults to 1. (Since 8.1) +# # Features: # # @unstable: Members @x-checkpoint-delay and @x-vcpu-dirty-limit-period @@ -1191,7 +1202,8 @@ '*multifd-zstd-level': 'uint8', '*block-bitmap-mapping': [ 'BitmapMigrationNodeAlias' ], '*x-vcpu-dirty-limit-period': { 'type': 'uint64', - 'features': [ 'unstable' ] } } } + 'features': [ 'unstable' ] }, + '*vcpu-dirty-limit': 'uint64'} } ## # @query-migrate-parameters: diff --git a/migration/migration-hmp-cmds.c b/migration/migration-hmp-cmds.c index 352e9ec716..35e8020bbf 100644 --- a/migration/migration-hmp-cmds.c +++ b/migration/migration-hmp-cmds.c @@ -368,6 +368,10 @@ void hmp_info_migrate_parameters(Monitor *mon, const QDict *qdict) monitor_printf(mon, "%s: %" PRIu64 " ms\n", MigrationParameter_str(MIGRATION_PARAMETER_X_VCPU_DIRTY_LIMIT_PERIOD), params->x_vcpu_dirty_limit_period); + + monitor_printf(mon, "%s: %" PRIu64 " MB/s\n", + MigrationParameter_str(MIGRATION_PARAMETER_VCPU_DIRTY_LIMIT), + params->vcpu_dirty_limit); } qapi_free_MigrationParameters(params); @@ -628,6 +632,10 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict *qdict) p->has_x_vcpu_dirty_limit_period = true; visit_type_size(v, param, &p->x_vcpu_dirty_limit_period, &err); break; + case MIGRATION_PARAMETER_VCPU_DIRTY_LIMIT: + p->has_vcpu_dirty_limit = true; + visit_type_size(v, param, &p->vcpu_dirty_limit, &err); + break; default: assert(0); } diff --git a/migration/options.c b/migration/options.c index 1de63ba775..7d2d98830e 100644 --- a/migration/options.c +++ b/migration/options.c @@ -81,6 +81,7 @@ DEFINE_PROP_BOOL(name, MigrationState, capabilities[x], false) #define DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT_PERIOD 1000 /* milliseconds */ +#define DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT 1 /* MB/s */ Property migration_properties[] = { DEFINE_PROP_BOOL("store-global-state", MigrationState, @@ -168,6 +169,9 @@ Property migration_properties[] = { DEFINE_PROP_UINT64("x-vcpu-dirty-limit-period", MigrationState, parameters.x_vcpu_dirty_limit_period, DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT_PERIOD), + DEFINE_PROP_UINT64("vcpu-dirty-limit", MigrationState, + parameters.vcpu_dirty_limit, + DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT), /* Migration capabilities */ DEFINE_PROP_MIG_CAP("x-xbzrle", MIGRATION_CAPABILITY_XBZRLE), @@ -915,6 +919,8 @@ MigrationParameters *qmp_query_migrate_parameters(Error **errp) params->has_x_vcpu_dirty_limit_period = true; params->x_vcpu_dirty_limit_period = s->parameters.x_vcpu_dirty_limit_period; + params->has_vcpu_dirty_limit = true; + params->vcpu_dirty_limit = s->parameters.vcpu_dirty_limit; return params; } @@ -949,6 +955,7 @@ void migrate_params_init(MigrationParameters *params) params->has_announce_rounds = true; params->has_announce_step = true; params->has_x_vcpu_dirty_limit_period = true; + params->has_vcpu_dirty_limit = true; } /* @@ -1118,6 +1125,14 @@ bool migrate_params_check(MigrationParameters *params, Error **errp) return false; } + if (params->has_vcpu_dirty_limit && + (params->vcpu_dirty_limit < 1)) { + error_setg(errp, QERR_INVALID_PARAMETER_VALUE, + "vcpu_dirty_limit", + "is invalid, it must greater then 1 MB/s"); + return false; + } + return true; } @@ -1222,6 +1237,9 @@ static void migrate_params_test_apply(MigrateSetParameters *params, dest->x_vcpu_dirty_limit_period = params->x_vcpu_dirty_limit_period; } + if (params->has_vcpu_dirty_limit) { + dest->vcpu_dirty_limit = params->vcpu_dirty_limit; + } } static void migrate_params_apply(MigrateSetParameters *params, Error **errp) @@ -1345,6 +1363,9 @@ static void migrate_params_apply(MigrateSetParameters *params, Error **errp) s->parameters.x_vcpu_dirty_limit_period = params->x_vcpu_dirty_limit_period; } + if (params->has_vcpu_dirty_limit) { + s->parameters.vcpu_dirty_limit = params->vcpu_dirty_limit; + } } void qmp_migrate_set_parameters(MigrateSetParameters *params, Error **errp) -- 2.40.1