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X-Received-From: 210.118.77.12 Subject: [Qemu-devel] [PATCH v8 10/11] migration: add postcopy total blocktime into query-migrate X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: i.maximets@samsung.com, Alexey Perevalov , peterx@redhat.com, dgilbert@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Postcopy total blocktime is available on destination side only. But query-migrate was possible only for source. This patch adds ability to call query-migrate on destination. To be able to see postcopy blocktime, need to request postcopy-blocktime capability. The query-migrate command will show following sample result: {"return": "postcopy-vcpu-blocktime": [115, 100], "status": "completed", "postcopy-blocktime": 100 }} postcopy_vcpu_blocktime contains list, where the first item is the first vCPU in QEMU. This patch has a drawback, it combines states of incoming and outgoing migration. Ongoing migration state will overwrite incoming state. Looks like better to separate query-migrate for incoming and outgoing migration or add parameter to indicate type of migration. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Alexey Perevalov --- hmp.c | 15 ++++++++++++ include/migration/migration.h | 4 +++ migration/migration.c | 40 +++++++++++++++++++++++++++--- migration/postcopy-ram.c | 57 +++++++++++++++++++++++++++++++++++++++= ++++ migration/trace-events | 1 + qapi-schema.json | 9 ++++++- 6 files changed, 122 insertions(+), 4 deletions(-) diff --git a/hmp.c b/hmp.c index 8c72c58..e0c4fdf 100644 --- a/hmp.c +++ b/hmp.c @@ -262,6 +262,21 @@ void hmp_info_migrate(Monitor *mon, const QDict *qdict) info->cpu_throttle_percentage); } =20 + if (info->has_postcopy_blocktime) { + monitor_printf(mon, "postcopy blocktime: %" PRId64 "\n", + info->postcopy_blocktime); + } + + if (info->has_postcopy_vcpu_blocktime) { + Visitor *v; + char *str; + v =3D string_output_visitor_new(false, &str); + visit_type_int64List(v, NULL, &info->postcopy_vcpu_blocktime, NULL= ); + visit_complete(v, &str); + monitor_printf(mon, "postcopy vcpu blocktime: %s\n", str); + g_free(str); + visit_free(v); + } qapi_free_MigrationInfo(info); qapi_free_MigrationCapabilityStatusList(caps); } diff --git a/include/migration/migration.h b/include/migration/migration.h index 766e802..7d20470 100644 --- a/include/migration/migration.h +++ b/include/migration/migration.h @@ -98,6 +98,10 @@ struct MigrationIncomingState { =20 MigrationIncomingState *migration_incoming_get_current(void); void migration_incoming_state_destroy(void); +/* + * Functions to work with blocktime context + */ +void fill_destination_postcopy_migration_info(MigrationInfo *info); =20 struct MigrationState { diff --git a/migration/migration.c b/migration/migration.c index d1cc34f..b80d5b5 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -625,14 +625,15 @@ static void populate_ram_info(MigrationInfo *info, Mi= grationState *s) } } =20 -MigrationInfo *qmp_query_migrate(Error **errp) +static void fill_source_migration_info(MigrationInfo *info) { - MigrationInfo *info =3D g_malloc0(sizeof(*info)); MigrationState *s =3D migrate_get_current(); =20 switch (s->state) { case MIGRATION_STATUS_NONE: /* no migration has happened ever */ + /* do not overwrite destination migration status */ + return; break; case MIGRATION_STATUS_SETUP: info->has_status =3D true; @@ -718,10 +719,43 @@ MigrationInfo *qmp_query_migrate(Error **errp) break; } info->status =3D s->state; +} =20 - return info; +static void fill_destination_migration_info(MigrationInfo *info) +{ + MigrationIncomingState *mis =3D migration_incoming_get_current(); + + switch (mis->state) { + case MIGRATION_STATUS_NONE: + return; + break; + case MIGRATION_STATUS_SETUP: + case MIGRATION_STATUS_CANCELLING: + case MIGRATION_STATUS_CANCELLED: + case MIGRATION_STATUS_ACTIVE: + case MIGRATION_STATUS_POSTCOPY_ACTIVE: + case MIGRATION_STATUS_FAILED: + case MIGRATION_STATUS_COLO: + info->has_status =3D true; + break; + case MIGRATION_STATUS_COMPLETED: + info->has_status =3D true; + fill_destination_postcopy_migration_info(info); + break; + } + info->status =3D mis->state; } =20 +MigrationInfo *qmp_query_migrate(Error **errp) +{ + MigrationInfo *info =3D g_malloc0(sizeof(*info)); + + fill_destination_migration_info(info); + fill_source_migration_info(info); + + return info; + } + void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, Error **errp) { diff --git a/migration/postcopy-ram.c b/migration/postcopy-ram.c index 0ad9f9f..7f5b402 100644 --- a/migration/postcopy-ram.c +++ b/migration/postcopy-ram.c @@ -117,6 +117,55 @@ static struct PostcopyBlocktimeContext *blocktime_cont= ext_new(void) return ctx; } =20 +static int64List *get_vcpu_blocktime_list(PostcopyBlocktimeContext *ctx) +{ + int64List *list =3D NULL, *entry =3D NULL; + int i; + + for (i =3D smp_cpus - 1; i >=3D 0; i--) { + entry =3D g_new0(int64List, 1); + entry->value =3D ctx->vcpu_blocktime[i]; + entry->next =3D list; + list =3D entry; + } + + return list; +} + +/* + * This function just populates MigrationInfo from postcopy's + * blocktime context. It will not populate MigrationInfo, + * unless postcopy-blocktime capability was set. + * + * @info: pointer to MigrationInfo to populate + */ +void fill_destination_postcopy_migration_info(MigrationInfo *info) +{ + MigrationIncomingState *mis =3D migration_incoming_get_current(); + PostcopyBlocktimeContext *bc =3D mis->blocktime_ctx; + + if (!bc) { + return; + } + + info->has_postcopy_blocktime =3D true; + info->postcopy_blocktime =3D bc->total_blocktime; + info->has_postcopy_vcpu_blocktime =3D true; + info->postcopy_vcpu_blocktime =3D get_vcpu_blocktime_list(bc); +} + +static uint64_t get_postcopy_total_blocktime(void) +{ + MigrationIncomingState *mis =3D migration_incoming_get_current(); + PostcopyBlocktimeContext *bc =3D mis->blocktime_ctx; + + if (!bc) { + return 0; + } + + return bc->total_blocktime; +} + /** * receive_ufd_features: check userfault fd features, to request only supp= orted * features in the future. @@ -491,6 +540,9 @@ int postcopy_ram_incoming_cleanup(MigrationIncomingStat= e *mis) munmap(mis->postcopy_tmp_zero_page, mis->largest_page_size); mis->postcopy_tmp_zero_page =3D NULL; } + trace_postcopy_ram_incoming_cleanup_blocktime( + get_postcopy_total_blocktime()); + trace_postcopy_ram_incoming_cleanup_exit(); return 0; } @@ -950,6 +1002,11 @@ void *postcopy_get_tmp_page(MigrationIncomingState *m= is) =20 #else /* No target OS support, stubs just fail */ +void fill_destination_postcopy_migration_info(MigrationInfo *info) +{ + error_report("%s: No OS support", __func__); +} + bool postcopy_ram_supported_by_host(MigrationIncomingState *mis) { error_report("%s: No OS support", __func__); diff --git a/migration/trace-events b/migration/trace-events index 7bdadbb..55a3b6e 100644 --- a/migration/trace-events +++ b/migration/trace-events @@ -195,6 +195,7 @@ postcopy_ram_incoming_cleanup_closeuf(void) "" postcopy_ram_incoming_cleanup_entry(void) "" postcopy_ram_incoming_cleanup_exit(void) "" postcopy_ram_incoming_cleanup_join(void) "" +postcopy_ram_incoming_cleanup_blocktime(uint64_t total) "total blocktime %= " PRIu64 save_xbzrle_page_skipping(void) "" save_xbzrle_page_overflow(void) "" ram_save_iterate_big_wait(uint64_t milliconds, int iterations) "big wait: = %" PRIu64 " milliseconds, %d iterations" diff --git a/qapi-schema.json b/qapi-schema.json index e906953..9229bbc 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -712,6 +712,11 @@ # @status is 'failed'. Clients should not attempt to parse the # error strings. (Since 2.7) # +# @postcopy-blocktime: total time when all vCPU were blocked during postco= py +# live migration (Since 2.10) +# +# @postcopy-vcpu-blocktime: list of the postcopy blocktime per vCPU (Since= 2.10) +# # Since: 0.14.0 ## { 'struct': 'MigrationInfo', @@ -723,7 +728,9 @@ '*downtime': 'int', '*setup-time': 'int', '*cpu-throttle-percentage': 'int', - '*error-desc': 'str'} } + '*error-desc': 'str', + '*postcopy-blocktime' : 'int64', + '*postcopy-vcpu-blocktime': ['int64']} } =20 ## # @query-migrate: --=20 1.9.1