From patchwork Thu May 26 06:12:15 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amit Shah X-Patchwork-Id: 626572 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3rFfNL0Pzjz9s9G for ; Thu, 26 May 2016 16:28:18 +1000 (AEST) Received: from localhost ([::1]:36628 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b5omG-0002sc-1w for incoming@patchwork.ozlabs.org; Thu, 26 May 2016 02:28:16 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36025) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b5oY2-0005sw-CM for qemu-devel@nongnu.org; Thu, 26 May 2016 02:13:35 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1b5oY0-00005B-2c for qemu-devel@nongnu.org; Thu, 26 May 2016 02:13:33 -0400 Received: from mx1.redhat.com ([209.132.183.28]:59885) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b5oXz-00004y-QP for qemu-devel@nongnu.org; Thu, 26 May 2016 02:13:32 -0400 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 79CD380F61; Thu, 26 May 2016 06:13:31 +0000 (UTC) Received: from localhost (ovpn-116-25.sin2.redhat.com [10.67.116.25]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u4Q6DTMH026609; Thu, 26 May 2016 02:13:30 -0400 From: Amit Shah To: Peter Maydell Date: Thu, 26 May 2016 11:42:15 +0530 Message-Id: <2594f56d4c7ef621da5d0c21921f8fda32025623.1464242913.git.amit.shah@redhat.com> In-Reply-To: References: In-Reply-To: References: X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Thu, 26 May 2016 06:13:31 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 24/28] migration: don't use an array for storing migrate parameters 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: qemu list , Amit Shah , "Dr. David Alan Gilbert" , Juan Quintela Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: "Daniel P. Berrange" The MigrateState struct uses an array for storing migration parameters. This presumes that all future parameters will be integers too, which is not going to be the case. There is no functional reason why an array is used, if anything it makes the code less clear. The QAPI schema already defines a struct - MigrationParameters - capable of storing all the individual parameters, so just use that instead of an array. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Daniel P. Berrange Message-Id: <1461751518-12128-25-git-send-email-berrange@redhat.com> Signed-off-by: Amit Shah --- include/migration/migration.h | 5 +++- migration/migration.c | 55 ++++++++++++++++++------------------------- migration/ram.c | 6 ++--- 3 files changed, 29 insertions(+), 37 deletions(-) diff --git a/include/migration/migration.h b/include/migration/migration.h index d24c6ef..74105a1 100644 --- a/include/migration/migration.h +++ b/include/migration/migration.h @@ -135,9 +135,12 @@ struct MigrationState QemuThread thread; QEMUBH *cleanup_bh; QEMUFile *to_dst_file; - int parameters[MIGRATION_PARAMETER__MAX]; + + /* New style params from 'migrate-set-parameters' */ + MigrationParameters parameters; int state; + /* Old style params from 'migrate' command */ MigrationParams params; /* State related to return path */ diff --git a/migration/migration.c b/migration/migration.c index 695384b..27064af 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -82,16 +82,13 @@ MigrationState *migrate_get_current(void) .bandwidth_limit = MAX_THROTTLE, .xbzrle_cache_size = DEFAULT_MIGRATE_CACHE_SIZE, .mbps = -1, - .parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = - DEFAULT_MIGRATE_COMPRESS_LEVEL, - .parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = - DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT, - .parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = - DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT, - .parameters[MIGRATION_PARAMETER_CPU_THROTTLE_INITIAL] = - DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL, - .parameters[MIGRATION_PARAMETER_CPU_THROTTLE_INCREMENT] = - DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT, + .parameters = { + .compress_level = DEFAULT_MIGRATE_COMPRESS_LEVEL, + .compress_threads = DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT, + .decompress_threads = DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT, + .cpu_throttle_initial = DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL, + .cpu_throttle_increment = DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT, + }, }; if (!once) { @@ -534,15 +531,11 @@ MigrationParameters *qmp_query_migrate_parameters(Error **errp) MigrationState *s = migrate_get_current(); params = g_malloc0(sizeof(*params)); - params->compress_level = s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; - params->compress_threads = - s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; - params->decompress_threads = - s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; - params->cpu_throttle_initial = - s->parameters[MIGRATION_PARAMETER_CPU_THROTTLE_INITIAL]; - params->cpu_throttle_increment = - s->parameters[MIGRATION_PARAMETER_CPU_THROTTLE_INCREMENT]; + params->compress_level = s->parameters.compress_level; + params->compress_threads = s->parameters.compress_threads; + params->decompress_threads = s->parameters.decompress_threads; + params->cpu_throttle_initial = s->parameters.cpu_throttle_initial; + params->cpu_throttle_increment = s->parameters.cpu_throttle_increment; return params; } @@ -743,7 +736,8 @@ void qmp_migrate_set_parameters(bool has_compress_level, bool has_cpu_throttle_initial, int64_t cpu_throttle_initial, bool has_cpu_throttle_increment, - int64_t cpu_throttle_increment, Error **errp) + int64_t cpu_throttle_increment, + Error **errp) { MigrationState *s = migrate_get_current(); @@ -780,26 +774,23 @@ void qmp_migrate_set_parameters(bool has_compress_level, } if (has_compress_level) { - s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = compress_level; + s->parameters.compress_level = compress_level; } if (has_compress_threads) { - s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = compress_threads; + s->parameters.compress_threads = compress_threads; } if (has_decompress_threads) { - s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = - decompress_threads; + s->parameters.decompress_threads = decompress_threads; } if (has_cpu_throttle_initial) { - s->parameters[MIGRATION_PARAMETER_CPU_THROTTLE_INITIAL] = - cpu_throttle_initial; + s->parameters.cpu_throttle_initial = cpu_throttle_initial; } - if (has_cpu_throttle_increment) { - s->parameters[MIGRATION_PARAMETER_CPU_THROTTLE_INCREMENT] = - cpu_throttle_increment; + s->parameters.cpu_throttle_increment = cpu_throttle_increment; } } + void qmp_migrate_start_postcopy(Error **errp) { MigrationState *s = migrate_get_current(); @@ -1195,7 +1186,7 @@ int migrate_compress_level(void) s = migrate_get_current(); - return s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; + return s->parameters.compress_level; } int migrate_compress_threads(void) @@ -1204,7 +1195,7 @@ int migrate_compress_threads(void) s = migrate_get_current(); - return s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; + return s->parameters.compress_threads; } int migrate_decompress_threads(void) @@ -1213,7 +1204,7 @@ int migrate_decompress_threads(void) s = migrate_get_current(); - return s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; + return s->parameters.decompress_threads; } bool migrate_use_events(void) diff --git a/migration/ram.c b/migration/ram.c index 54e2151..844ea46 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -429,10 +429,8 @@ static size_t save_page_header(QEMUFile *f, RAMBlock *block, ram_addr_t offset) static void mig_throttle_guest_down(void) { MigrationState *s = migrate_get_current(); - uint64_t pct_initial = - s->parameters[MIGRATION_PARAMETER_CPU_THROTTLE_INITIAL]; - uint64_t pct_icrement = - s->parameters[MIGRATION_PARAMETER_CPU_THROTTLE_INCREMENT]; + uint64_t pct_initial = s->parameters.cpu_throttle_initial; + uint64_t pct_icrement = s->parameters.cpu_throttle_increment; /* We have not started throttling yet. Let's start it. */ if (!cpu_throttle_active()) {