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[PATCH v3 04/10] qapi/migration: Introduce x-vcpu-dirty-limit-period par
From: |
huangy81 |
Subject: |
[PATCH v3 04/10] qapi/migration: Introduce x-vcpu-dirty-limit-period parameter |
Date: |
Sun, 4 Dec 2022 00:38:49 +0800 |
From: Hyman Huang(黄勇) <huangy81@chinatelecom.cn>
Introduce "x-vcpu-dirty-limit-period" migration experimental
parameter, which is in the range of 1 to 1000ms and used to
make dirtyrate calculation period configurable.
Currently with the "x-vcpu-dirty-limit-period" varies, the
total time of live migration changes, test results show the
optimal value of "x-vcpu-dirty-limit-period" ranges from
500ms to 1000 ms. "x-vcpu-dirty-limit-period" should be made
stable once it proves best value can not be determined with
developer's experiments.
Signed-off-by: Hyman Huang(黄勇) <huangy81@chinatelecom.cn>
---
migration/migration.c | 26 ++++++++++++++++++++++++++
monitor/hmp-cmds.c | 8 ++++++++
qapi/migration.json | 34 +++++++++++++++++++++++++++-------
3 files changed, 61 insertions(+), 7 deletions(-)
diff --git a/migration/migration.c b/migration/migration.c
index f485eea..1439d61 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -116,6 +116,8 @@
#define DEFAULT_MIGRATE_ANNOUNCE_ROUNDS 5
#define DEFAULT_MIGRATE_ANNOUNCE_STEP 100
+#define DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT_PERIOD 1000 /* microsecond */
+
static NotifierList migration_state_notifiers =
NOTIFIER_LIST_INITIALIZER(migration_state_notifiers);
@@ -963,6 +965,9 @@ MigrationParameters *qmp_query_migrate_parameters(Error
**errp)
s->parameters.block_bitmap_mapping);
}
+ params->has_x_vcpu_dirty_limit_period = true;
+ params->x_vcpu_dirty_limit_period =
s->parameters.x_vcpu_dirty_limit_period;
+
return params;
}
@@ -1582,6 +1587,15 @@ static bool migrate_params_check(MigrationParameters
*params, Error **errp)
}
#endif
+ if (params->has_x_vcpu_dirty_limit_period &&
+ (params->x_vcpu_dirty_limit_period < 1 ||
+ params->x_vcpu_dirty_limit_period > 1000)) {
+ error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
+ "x-vcpu-dirty-limit-period",
+ "a value between 1 and 1000");
+ return false;
+ }
+
return true;
}
@@ -1681,6 +1695,10 @@ static void
migrate_params_test_apply(MigrateSetParameters *params,
dest->has_block_bitmap_mapping = true;
dest->block_bitmap_mapping = params->block_bitmap_mapping;
}
+
+ if (params->has_x_vcpu_dirty_limit_period) {
+ dest->x_vcpu_dirty_limit_period = params->x_vcpu_dirty_limit_period;
+ }
}
static void migrate_params_apply(MigrateSetParameters *params, Error **errp)
@@ -1803,6 +1821,10 @@ static void migrate_params_apply(MigrateSetParameters
*params, Error **errp)
QAPI_CLONE(BitmapMigrationNodeAliasList,
params->block_bitmap_mapping);
}
+ if (params->has_x_vcpu_dirty_limit_period) {
+ s->parameters.x_vcpu_dirty_limit_period =
+ params->x_vcpu_dirty_limit_period;
+ }
}
void qmp_migrate_set_parameters(MigrateSetParameters *params, Error **errp)
@@ -4404,6 +4426,9 @@ static Property migration_properties[] = {
DEFINE_PROP_STRING("tls-creds", MigrationState, parameters.tls_creds),
DEFINE_PROP_STRING("tls-hostname", MigrationState,
parameters.tls_hostname),
DEFINE_PROP_STRING("tls-authz", MigrationState, parameters.tls_authz),
+ DEFINE_PROP_UINT64("x-vcpu-dirty-limit-period", MigrationState,
+ parameters.x_vcpu_dirty_limit_period,
+ DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT_PERIOD),
/* Migration capabilities */
DEFINE_PROP_MIG_CAP("x-xbzrle", MIGRATION_CAPABILITY_XBZRLE),
@@ -4495,6 +4520,7 @@ static void migration_instance_init(Object *obj)
params->has_tls_creds = true;
params->has_tls_hostname = true;
params->has_tls_authz = true;
+ params->has_x_vcpu_dirty_limit_period = true;
qemu_sem_init(&ms->postcopy_pause_sem, 0);
qemu_sem_init(&ms->postcopy_pause_rp_sem, 0);
diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c
index 01b789a..a3170ca 100644
--- a/monitor/hmp-cmds.c
+++ b/monitor/hmp-cmds.c
@@ -513,6 +513,10 @@ 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);
}
qapi_free_MigrationParameters(params);
@@ -1332,6 +1336,10 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict
*qdict)
error_setg(&err, "The block-bitmap-mapping parameter can only be set "
"through QMP");
break;
+ case MIGRATION_PARAMETER_X_VCPU_DIRTY_LIMIT_PERIOD:
+ p->has_x_vcpu_dirty_limit_period = true;
+ visit_type_size(v, param, &p->x_vcpu_dirty_limit_period, &err);
+ break;
default:
assert(0);
}
diff --git a/qapi/migration.json b/qapi/migration.json
index 88ecf86..c428bcd 100644
--- a/qapi/migration.json
+++ b/qapi/migration.json
@@ -776,8 +776,13 @@
# block device name if there is one, and to their node
name
# otherwise. (Since 5.2)
#
+# @x-vcpu-dirty-limit-period: Periodic time (in milliseconds) of dirty limit
during
+# live migration. Should be in the range 1 to
1000ms,
+# defaults to 1000ms. (Since 7.3)
+#
# Features:
-# @unstable: Member @x-checkpoint-delay is experimental.
+# @unstable: Members @x-checkpoint-delay and @x-vcpu-dirty-limit-period
+# are experimental.
#
# Since: 2.4
##
@@ -795,8 +800,9 @@
'multifd-channels',
'xbzrle-cache-size', 'max-postcopy-bandwidth',
'max-cpu-throttle', 'multifd-compression',
- 'multifd-zlib-level' ,'multifd-zstd-level',
- 'block-bitmap-mapping' ] }
+ 'multifd-zlib-level', 'multifd-zstd-level',
+ 'block-bitmap-mapping',
+ { 'name': 'x-vcpu-dirty-limit-period', 'features': ['unstable'] } ]
}
##
# @MigrateSetParameters:
@@ -941,8 +947,13 @@
# block device name if there is one, and to their node
name
# otherwise. (Since 5.2)
#
+# @x-vcpu-dirty-limit-period: Periodic time (in milliseconds) of dirty limit
during
+# live migration. Should be in the range 1 to
1000ms,
+# defaults to 1000ms. (Since 7.3)
+#
# Features:
-# @unstable: Member @x-checkpoint-delay is experimental.
+# @unstable: Members @x-checkpoint-delay and @x-vcpu-dirty-limit-period
+# are experimental.
#
# Since: 2.4
##
@@ -976,7 +987,9 @@
'*multifd-compression': 'MultiFDCompression',
'*multifd-zlib-level': 'uint8',
'*multifd-zstd-level': 'uint8',
- '*block-bitmap-mapping': [ 'BitmapMigrationNodeAlias' ] } }
+ '*block-bitmap-mapping': [ 'BitmapMigrationNodeAlias' ],
+ '*x-vcpu-dirty-limit-period': { 'type': 'uint64',
+ 'features': [ 'unstable' ] } } }
##
# @migrate-set-parameters:
@@ -1141,8 +1154,13 @@
# block device name if there is one, and to their node
name
# otherwise. (Since 5.2)
#
+# @x-vcpu-dirty-limit-period: Periodic time (in milliseconds) of dirty limit
during
+# live migration. Should be in the range 1 to
1000ms,
+# defaults to 1000ms. (Since 7.3)
+#
# Features:
-# @unstable: Member @x-checkpoint-delay is experimental.
+# @unstable: Members @x-checkpoint-delay and @x-vcpu-dirty-limit-period
+# are experimental.
#
# Since: 2.4
##
@@ -1174,7 +1192,9 @@
'*multifd-compression': 'MultiFDCompression',
'*multifd-zlib-level': 'uint8',
'*multifd-zstd-level': 'uint8',
- '*block-bitmap-mapping': [ 'BitmapMigrationNodeAlias' ] } }
+ '*block-bitmap-mapping': [ 'BitmapMigrationNodeAlias' ],
+ '*x-vcpu-dirty-limit-period': { 'type': 'uint64',
+ 'features': [ 'unstable' ] } } }
##
# @query-migrate-parameters:
--
1.8.3.1
- [PATCH v3 00/10] migration: introduce dirtylimit capabilit, huangy81, 2022/12/03
- [PATCH v3 03/10] kvm: dirty-ring: Fix race with vcpu creation, huangy81, 2022/12/03
- [PATCH v3 02/10] softmmu/dirtylimit: Add parameter check for hmp "set_vcpu_dirty_limit", huangy81, 2022/12/03
- [PATCH v3 01/10] dirtylimit: Fix overflow when computing MB, huangy81, 2022/12/03
- [PATCH v3 05/10] qapi/migration: Introduce vcpu-dirty-limit parameters, huangy81, 2022/12/03
- [PATCH v3 07/10] migration: Refactor auto-converge capability logic, huangy81, 2022/12/03
- [PATCH v3 06/10] migration: Introduce dirty-limit capability, huangy81, 2022/12/03
- [PATCH v3 04/10] qapi/migration: Introduce x-vcpu-dirty-limit-period parameter,
huangy81 <=
- [PATCH v3 08/10] migration: Implement dirty-limit convergence algo, huangy81, 2022/12/03
- [PATCH v3 09/10] migration: Export dirty-limit time info for observation, huangy81, 2022/12/03
- [PATCH v3 10/10] tests: Add migration dirty-limit capability test, huangy81, 2022/12/03