From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49147) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ur92C-0000gg-PK for qemu-devel@nongnu.org; Mon, 24 Jun 2013 11:50:30 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Ur92A-0001mn-W0 for qemu-devel@nongnu.org; Mon, 24 Jun 2013 11:50:28 -0400 Received: from g4t0014.houston.hp.com ([15.201.24.17]:28406) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Ur92A-0001mX-Og for qemu-devel@nongnu.org; Mon, 24 Jun 2013 11:50:26 -0400 From: Chegu Vinod Date: Mon, 24 Jun 2013 03:49:42 -0600 Message-Id: <1372067382-141082-3-git-send-email-chegu_vinod@hp.com> In-Reply-To: <1372067382-141082-1-git-send-email-chegu_vinod@hp.com> References: <1372067382-141082-1-git-send-email-chegu_vinod@hp.com> Subject: [Qemu-devel] [PATCH v8 2/3] Add 'auto-converge' migration capability List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: eblake@redhat.com, anthony@codemonkey.ws, quintela@redhat.com, owasserm@redhat.com, qemu-devel@nongnu.org, pbonzini@redhat.com Cc: chegu_vinod@hp.com The auto-converge migration capability allows the user to specify if they choose live migration seqeunce to automatically detect and force convergence. Signed-off-by: Chegu Vinod Reviewed-by: Paolo Bonzini Reviewed-by: Eric Blake --- include/migration/migration.h | 2 ++ migration.c | 9 +++++++++ qapi-schema.json | 5 ++++- 3 files changed, 15 insertions(+), 1 deletions(-) diff --git a/include/migration/migration.h b/include/migration/migration.h index e2acec6..ace91b0 100644 --- a/include/migration/migration.h +++ b/include/migration/migration.h @@ -127,4 +127,6 @@ int migrate_use_xbzrle(void); int64_t migrate_xbzrle_cache_size(void); int64_t xbzrle_cache_resize(int64_t new_size); + +bool migrate_auto_converge(void); #endif diff --git a/migration.c b/migration.c index 058f9e6..d0759c1 100644 --- a/migration.c +++ b/migration.c @@ -473,6 +473,15 @@ void qmp_migrate_set_downtime(double value, Error **errp) max_downtime = (uint64_t)value; } +bool migrate_auto_converge(void) +{ + MigrationState *s; + + s = migrate_get_current(); + + return s->enabled_capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; +} + int migrate_use_xbzrle(void) { MigrationState *s; diff --git a/qapi-schema.json b/qapi-schema.json index a80ee40..c019fec 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -605,10 +605,13 @@ # This feature allows us to minimize migration traffic for certain work # loads, by sending compressed difference of the pages # +# @auto-converge: If enabled, QEMU will automatically throttle down the guest +# to speed up convergence of RAM migration. (since 1.6) +# # Since: 1.2 ## { 'enum': 'MigrationCapability', - 'data': ['xbzrle'] } + 'data': ['xbzrle', 'auto-converge'] } ## # @MigrationCapabilityStatus -- 1.7.1