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Mon, 09 Sep 2024 06:48:44 -0700 (PDT) From: Hyman Huang To: qemu-devel@nongnu.org Cc: Peter Xu , Fabiano Rosas , Eric Blake , Markus Armbruster , David Hildenbrand , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Paolo Bonzini , yong.huang@smartx.com Subject: [PATCH RFC 03/10] qapi/migration: Introduce periodic CPU throttling parameters Date: Mon, 9 Sep 2024 21:47:15 +0800 Message-Id: <4eb9f818219880b4fbdd5609c8fb998626febe62.1725889277.git.yong.huang@smartx.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::102d; envelope-from=yong.huang@smartx.com; helo=mail-pj1-x102d.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @smartx-com.20230601.gappssmtp.com) X-ZM-MESSAGEID: 1725889764358116600 Content-Type: text/plain; charset="utf-8" To activate the periodic CPU throttleing feature, introduce the cpu-periodic-throttle. To control the frequency of throttling, introduce the cpu-periodic-throttle-interval. Signed-off-by: Hyman Huang --- migration/migration-hmp-cmds.c | 17 +++++++++++ migration/options.c | 54 ++++++++++++++++++++++++++++++++++ migration/options.h | 2 ++ qapi/migration.json | 25 +++++++++++++++- 4 files changed, 97 insertions(+), 1 deletion(-) diff --git a/migration/migration-hmp-cmds.c b/migration/migration-hmp-cmds.c index 7d608d26e1..f7b8e06bb4 100644 --- a/migration/migration-hmp-cmds.c +++ b/migration/migration-hmp-cmds.c @@ -264,6 +264,15 @@ void hmp_info_migrate_parameters(Monitor *mon, const Q= Dict *qdict) monitor_printf(mon, "%s: %s\n", MigrationParameter_str(MIGRATION_PARAMETER_CPU_THROTTLE_TAILSL= OW), params->cpu_throttle_tailslow ? "on" : "off"); + assert(params->has_cpu_periodic_throttle); + monitor_printf(mon, "%s: %s\n", + MigrationParameter_str(MIGRATION_PARAMETER_CPU_PERIODIC_THROTT= LE), + params->cpu_periodic_throttle ? "on" : "off"); + assert(params->has_cpu_periodic_throttle_interval); + monitor_printf(mon, "%s: %u\n", + MigrationParameter_str( + MIGRATION_PARAMETER_CPU_PERIODIC_THROTTLE_INTERVAL), + params->cpu_periodic_throttle_interval); assert(params->has_max_cpu_throttle); monitor_printf(mon, "%s: %u\n", MigrationParameter_str(MIGRATION_PARAMETER_MAX_CPU_THROTTLE), @@ -512,6 +521,14 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDi= ct *qdict) p->has_cpu_throttle_tailslow =3D true; visit_type_bool(v, param, &p->cpu_throttle_tailslow, &err); break; + case MIGRATION_PARAMETER_CPU_PERIODIC_THROTTLE: + p->has_cpu_periodic_throttle =3D true; + visit_type_bool(v, param, &p->cpu_periodic_throttle, &err); + break; + case MIGRATION_PARAMETER_CPU_PERIODIC_THROTTLE_INTERVAL: + p->has_cpu_periodic_throttle_interval =3D true; + visit_type_uint8(v, param, &p->cpu_periodic_throttle_interval, &er= r); + break; case MIGRATION_PARAMETER_MAX_CPU_THROTTLE: p->has_max_cpu_throttle =3D true; visit_type_uint8(v, param, &p->max_cpu_throttle, &err); diff --git a/migration/options.c b/migration/options.c index 645f55003d..2dbe275ba0 100644 --- a/migration/options.c +++ b/migration/options.c @@ -44,6 +44,7 @@ #define DEFAULT_MIGRATE_THROTTLE_TRIGGER_THRESHOLD 50 #define DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL 20 #define DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT 10 +#define DEFAULT_MIGRATE_CPU_PERIODIC_THROTTLE_INTERVAL 5 #define DEFAULT_MIGRATE_MAX_CPU_THROTTLE 99 =20 /* Migration XBZRLE default cache size */ @@ -104,6 +105,11 @@ Property migration_properties[] =3D { DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT), DEFINE_PROP_BOOL("x-cpu-throttle-tailslow", MigrationState, parameters.cpu_throttle_tailslow, false), + DEFINE_PROP_BOOL("x-cpu-periodic-throttle", MigrationState, + parameters.cpu_periodic_throttle, false), + DEFINE_PROP_UINT8("x-cpu-periodic-throttle-interval", MigrationState, + parameters.cpu_periodic_throttle_interval, + DEFAULT_MIGRATE_CPU_PERIODIC_THROTTLE_INTERVAL), DEFINE_PROP_SIZE("x-max-bandwidth", MigrationState, parameters.max_bandwidth, MAX_THROTTLE), DEFINE_PROP_SIZE("avail-switchover-bandwidth", MigrationState, @@ -695,6 +701,20 @@ uint8_t migrate_cpu_throttle_initial(void) return s->parameters.cpu_throttle_initial; } =20 +uint8_t migrate_periodic_throttle_interval(void) +{ + MigrationState *s =3D migrate_get_current(); + + return s->parameters.cpu_periodic_throttle_interval; +} + +bool migrate_periodic_throttle(void) +{ + MigrationState *s =3D migrate_get_current(); + + return s->parameters.cpu_periodic_throttle; +} + bool migrate_cpu_throttle_tailslow(void) { MigrationState *s =3D migrate_get_current(); @@ -874,6 +894,11 @@ MigrationParameters *qmp_query_migrate_parameters(Erro= r **errp) params->cpu_throttle_increment =3D s->parameters.cpu_throttle_incremen= t; params->has_cpu_throttle_tailslow =3D true; params->cpu_throttle_tailslow =3D s->parameters.cpu_throttle_tailslow; + params->has_cpu_periodic_throttle =3D true; + params->cpu_periodic_throttle =3D s->parameters.cpu_periodic_throttle; + params->has_cpu_periodic_throttle_interval =3D true; + params->cpu_periodic_throttle_interval =3D + s->parameters.cpu_periodic_throttle_interval; params->tls_creds =3D g_strdup(s->parameters.tls_creds); params->tls_hostname =3D g_strdup(s->parameters.tls_hostname); params->tls_authz =3D g_strdup(s->parameters.tls_authz ? @@ -940,6 +965,8 @@ void migrate_params_init(MigrationParameters *params) params->has_cpu_throttle_initial =3D true; params->has_cpu_throttle_increment =3D true; params->has_cpu_throttle_tailslow =3D true; + params->has_cpu_periodic_throttle =3D true; + params->has_cpu_periodic_throttle_interval =3D true; params->has_max_bandwidth =3D true; params->has_downtime_limit =3D true; params->has_x_checkpoint_delay =3D true; @@ -996,6 +1023,15 @@ bool migrate_params_check(MigrationParameters *params= , Error **errp) return false; } =20 + if (params->has_cpu_periodic_throttle_interval && + (params->cpu_periodic_throttle_interval < 2 || + params->cpu_periodic_throttle_interval > 10)) { + error_setg(errp, QERR_INVALID_PARAMETER_VALUE, + "cpu_periodic_throttle_interval", + "an integer in the range of 2 to 10"); + return false; + } + if (params->has_max_bandwidth && (params->max_bandwidth > SIZE_MAX)) { error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "max_bandwidth", @@ -1163,6 +1199,15 @@ static void migrate_params_test_apply(MigrateSetPara= meters *params, dest->cpu_throttle_tailslow =3D params->cpu_throttle_tailslow; } =20 + if (params->has_cpu_periodic_throttle) { + dest->cpu_periodic_throttle =3D params->cpu_periodic_throttle; + } + + if (params->has_cpu_periodic_throttle_interval) { + dest->cpu_periodic_throttle_interval =3D + params->cpu_periodic_throttle_interval; + } + if (params->tls_creds) { assert(params->tls_creds->type =3D=3D QTYPE_QSTRING); dest->tls_creds =3D params->tls_creds->u.s; @@ -1271,6 +1316,15 @@ static void migrate_params_apply(MigrateSetParameter= s *params, Error **errp) s->parameters.cpu_throttle_tailslow =3D params->cpu_throttle_tails= low; } =20 + if (params->has_cpu_periodic_throttle) { + s->parameters.cpu_periodic_throttle =3D params->cpu_periodic_throt= tle; + } + + if (params->has_cpu_periodic_throttle_interval) { + s->parameters.cpu_periodic_throttle_interval =3D + params->cpu_periodic_throttle_interval; + } + if (params->tls_creds) { g_free(s->parameters.tls_creds); assert(params->tls_creds->type =3D=3D QTYPE_QSTRING); diff --git a/migration/options.h b/migration/options.h index a2397026db..efeac01470 100644 --- a/migration/options.h +++ b/migration/options.h @@ -68,6 +68,8 @@ bool migrate_has_block_bitmap_mapping(void); uint32_t migrate_checkpoint_delay(void); uint8_t migrate_cpu_throttle_increment(void); uint8_t migrate_cpu_throttle_initial(void); +uint8_t migrate_periodic_throttle_interval(void); +bool migrate_periodic_throttle(void); bool migrate_cpu_throttle_tailslow(void); bool migrate_direct_io(void); uint64_t migrate_downtime_limit(void); diff --git a/qapi/migration.json b/qapi/migration.json index 7324571e92..8281d4a83b 100644 --- a/qapi/migration.json +++ b/qapi/migration.json @@ -724,6 +724,12 @@ # be excessive at tail stage. The default value is false. (Since # 5.1) # +# @cpu-periodic-throttle: Make CPU throttling periodically. +# (Since 9.1) +# +# @cpu-periodic-throttle-interval: Interval of the periodic CPU throttling. +# (Since 9.1) +# # @tls-creds: ID of the 'tls-creds' object that provides credentials # for establishing a TLS connection over the migration data # channel. On the outgoing side of the migration, the credentials @@ -844,7 +850,8 @@ 'announce-rounds', 'announce-step', 'throttle-trigger-threshold', 'cpu-throttle-initial', 'cpu-throttle-increment', - 'cpu-throttle-tailslow', + 'cpu-throttle-tailslow', 'cpu-periodic-throttle', + 'cpu-periodic-throttle-interval', 'tls-creds', 'tls-hostname', 'tls-authz', 'max-bandwidth', 'avail-switchover-bandwidth', 'downtime-limit', { 'name': 'x-checkpoint-delay', 'features': [ 'unstable' ] }, @@ -899,6 +906,12 @@ # be excessive at tail stage. The default value is false. (Since # 5.1) # +# @cpu-periodic-throttle: Make CPU throttling periodically. +# (Since 9.1) +# +# @cpu-periodic-throttle-interval: Interval of the periodic CPU throttling. +# (Since 9.1) +# # @tls-creds: ID of the 'tls-creds' object that provides credentials # for establishing a TLS connection over the migration data # channel. On the outgoing side of the migration, the credentials @@ -1026,6 +1039,8 @@ '*cpu-throttle-initial': 'uint8', '*cpu-throttle-increment': 'uint8', '*cpu-throttle-tailslow': 'bool', + '*cpu-periodic-throttle': 'bool', + '*cpu-periodic-throttle-interval': 'uint8', '*tls-creds': 'StrOrNull', '*tls-hostname': 'StrOrNull', '*tls-authz': 'StrOrNull', @@ -1107,6 +1122,12 @@ # be excessive at tail stage. The default value is false. (Since # 5.1) # +# @cpu-periodic-throttle: Make CPU throttling periodically. +# (Since 9.1) +# +# @cpu-periodic-throttle-interval: Interval of the periodic CPU throttling. +# (Since 9.1) +# # @tls-creds: ID of the 'tls-creds' object that provides credentials # for establishing a TLS connection over the migration data # channel. On the outgoing side of the migration, the credentials @@ -1227,6 +1248,8 @@ '*cpu-throttle-initial': 'uint8', '*cpu-throttle-increment': 'uint8', '*cpu-throttle-tailslow': 'bool', + '*cpu-periodic-throttle': 'bool', + '*cpu-periodic-throttle-interval': 'uint8', '*tls-creds': 'str', '*tls-hostname': 'str', '*tls-authz': 'str', --=20 2.39.1