From patchwork Mon Sep 9 13:47:20 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yong Huang X-Patchwork-Id: 13797077 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8F90FECE579 for ; Mon, 9 Sep 2024 13:49:14 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1snelO-0001ZS-OB; Mon, 09 Sep 2024 09:49:06 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1snelM-0001PF-PP for qemu-devel@nongnu.org; Mon, 09 Sep 2024 09:49:04 -0400 Received: from mail-pj1-x1035.google.com ([2607:f8b0:4864:20::1035]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1snelK-0000Bi-S5 for qemu-devel@nongnu.org; Mon, 09 Sep 2024 09:49:04 -0400 Received: by mail-pj1-x1035.google.com with SMTP id 98e67ed59e1d1-2d89dbb60bdso2923562a91.1 for ; Mon, 09 Sep 2024 06:49:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=smartx-com.20230601.gappssmtp.com; s=20230601; t=1725889741; x=1726494541; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=r0+VMi25/Zc4CDone71m1lCGybIDfbvM1CcXIqSCA9s=; b=p26fR4YAEElT+Byzfj/pD3ukk90mrAwxNCHoLIeOXDw0FPKN7Oy6bqLgFLHtC7fSb/ CMpChNOYCpnpFvnCPCvaniTTtf87aFe/yLIO6WpRABM2IIJ1zRf6MWSm++dwahUh3nfI b0ccSi9IywJLFAQPZDLiEFFbHLYROcpwbjD/G0An62r1VzqpM7OK3FItrfAbR9d1LwNQ BxrfPSN8c/0PCkqjadU4o7oH9wIYY9/KBdTVON5ncmqnlPx5v8koGsUSlLogNruPONJG scIantOiVcNL69R9orhRippqkkPPrSx3qmca1aO/1LpnWbZ83yuBzmHXYUBhjuxQYgT6 gMaA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1725889741; x=1726494541; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=r0+VMi25/Zc4CDone71m1lCGybIDfbvM1CcXIqSCA9s=; b=RYgoiIhcCGkik83y3DQGlbDvKUIN1Syif4iCnjq3nol+l1/CfzWR2yXtnJySQS/A3P sd28BZSxlrsx2qqlwE7LN0UovfrGZBE4HE5kfyOnSx76ig12L1aY4fzMoD2WJKqvH3lA o+cmVsTUTQO09UerIEUUMSPqtQbGBnAM2SfFqvUoKvTo0c096rrz0lcIahaJP6ZSe6n9 quAE84SyQHtU9St1GaXJ6ufRUP7l18YM1AX8JDjAaOVs9QjMCTtJ+4L7YLDHCYIkmOD1 qw7hd20ivuejt4VFqkt/CLXOZ2ae60wNxONfDnx03rUHtaxwcoqZFHqZvoDTX9rYmSYr sCAg== X-Gm-Message-State: AOJu0YzbrMOYOJYGEyOrpOtpBrbf+6ZuLdRmXbYW7oO6Dwya9oJZhBht 1vTmzG3YgaOe6v0pjaTDQX8heA8O/tqTKhrotrhrBgeRa9/SSrSrwhtfm16HFltMNYxOhcjci6u 1+BjWvg== X-Google-Smtp-Source: AGHT+IEv0vyqNLBwnpgRZISdlcOecif4whKql3fH/CgRnN1+3UtbJcnUagKcl/aWN4VEJ+LhY92qkg== X-Received: by 2002:a17:90a:ba93:b0:2d8:a731:7db0 with SMTP id 98e67ed59e1d1-2daffe2735fmr8929016a91.35.1725889740675; Mon, 09 Sep 2024 06:49:00 -0700 (PDT) Received: from localhost.localdomain ([118.114.94.226]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2dab2c6b0b9sm7841031a91.0.2024.09.09.06.48.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Sep 2024 06:49:00 -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_Mathieu-Daud=C3=A9?= , Paolo Bonzini , yong.huang@smartx.com Subject: [PATCH RFC 08/10] migration: Introduce cpu-responsive-throttle parameter Date: Mon, 9 Sep 2024 21:47:20 +0800 Message-Id: <24b2598916502ae298fdf6ca296e8c1559710d78.1725889277.git.yong.huang@smartx.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: References: MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::1035; envelope-from=yong.huang@smartx.com; helo=mail-pj1-x1035.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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org To enable the responsive throttle that will be implemented in the next commit, introduce the cpu-responsive-throttle parameter. Signed-off-by: Hyman Huang --- migration/migration-hmp-cmds.c | 8 ++++++++ migration/options.c | 20 ++++++++++++++++++++ migration/options.h | 1 + qapi/migration.json | 16 +++++++++++++++- 4 files changed, 44 insertions(+), 1 deletion(-) diff --git a/migration/migration-hmp-cmds.c b/migration/migration-hmp-cmds.c index f7b8e06bb4..a3d4d3f62f 100644 --- a/migration/migration-hmp-cmds.c +++ b/migration/migration-hmp-cmds.c @@ -273,6 +273,10 @@ void hmp_info_migrate_parameters(Monitor *mon, const QDict *qdict) MigrationParameter_str( MIGRATION_PARAMETER_CPU_PERIODIC_THROTTLE_INTERVAL), params->cpu_periodic_throttle_interval); + assert(params->has_cpu_responsive_throttle); + monitor_printf(mon, "%s: %s\n", + MigrationParameter_str(MIGRATION_PARAMETER_CPU_RESPONSIVE_THROTTLE), + params->cpu_responsive_throttle ? "on" : "off"); assert(params->has_max_cpu_throttle); monitor_printf(mon, "%s: %u\n", MigrationParameter_str(MIGRATION_PARAMETER_MAX_CPU_THROTTLE), @@ -529,6 +533,10 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict *qdict) p->has_cpu_periodic_throttle_interval = true; visit_type_uint8(v, param, &p->cpu_periodic_throttle_interval, &err); break; + case MIGRATION_PARAMETER_CPU_RESPONSIVE_THROTTLE: + p->has_cpu_responsive_throttle = true; + visit_type_bool(v, param, &p->cpu_responsive_throttle, &err); + break; case MIGRATION_PARAMETER_MAX_CPU_THROTTLE: p->has_max_cpu_throttle = true; visit_type_uint8(v, param, &p->max_cpu_throttle, &err); diff --git a/migration/options.c b/migration/options.c index 2dbe275ba0..aa233684ee 100644 --- a/migration/options.c +++ b/migration/options.c @@ -110,6 +110,8 @@ Property migration_properties[] = { DEFINE_PROP_UINT8("x-cpu-periodic-throttle-interval", MigrationState, parameters.cpu_periodic_throttle_interval, DEFAULT_MIGRATE_CPU_PERIODIC_THROTTLE_INTERVAL), + DEFINE_PROP_BOOL("x-cpu-responsive-throttle", MigrationState, + parameters.cpu_responsive_throttle, false), DEFINE_PROP_SIZE("x-max-bandwidth", MigrationState, parameters.max_bandwidth, MAX_THROTTLE), DEFINE_PROP_SIZE("avail-switchover-bandwidth", MigrationState, @@ -715,6 +717,13 @@ bool migrate_periodic_throttle(void) return s->parameters.cpu_periodic_throttle; } +bool migrate_responsive_throttle(void) +{ + MigrationState *s = migrate_get_current(); + + return s->parameters.cpu_responsive_throttle; +} + bool migrate_cpu_throttle_tailslow(void) { MigrationState *s = migrate_get_current(); @@ -899,6 +908,8 @@ MigrationParameters *qmp_query_migrate_parameters(Error **errp) params->has_cpu_periodic_throttle_interval = true; params->cpu_periodic_throttle_interval = s->parameters.cpu_periodic_throttle_interval; + params->has_cpu_responsive_throttle = true; + params->cpu_responsive_throttle = s->parameters.cpu_responsive_throttle; params->tls_creds = g_strdup(s->parameters.tls_creds); params->tls_hostname = g_strdup(s->parameters.tls_hostname); params->tls_authz = g_strdup(s->parameters.tls_authz ? @@ -967,6 +978,7 @@ void migrate_params_init(MigrationParameters *params) params->has_cpu_throttle_tailslow = true; params->has_cpu_periodic_throttle = true; params->has_cpu_periodic_throttle_interval = true; + params->has_cpu_responsive_throttle = true; params->has_max_bandwidth = true; params->has_downtime_limit = true; params->has_x_checkpoint_delay = true; @@ -1208,6 +1220,10 @@ static void migrate_params_test_apply(MigrateSetParameters *params, params->cpu_periodic_throttle_interval; } + if (params->has_cpu_responsive_throttle) { + dest->cpu_responsive_throttle = params->cpu_responsive_throttle; + } + if (params->tls_creds) { assert(params->tls_creds->type == QTYPE_QSTRING); dest->tls_creds = params->tls_creds->u.s; @@ -1325,6 +1341,10 @@ static void migrate_params_apply(MigrateSetParameters *params, Error **errp) params->cpu_periodic_throttle_interval; } + if (params->has_cpu_responsive_throttle) { + s->parameters.cpu_responsive_throttle = params->cpu_responsive_throttle; + } + if (params->tls_creds) { g_free(s->parameters.tls_creds); assert(params->tls_creds->type == QTYPE_QSTRING); diff --git a/migration/options.h b/migration/options.h index efeac01470..613d675003 100644 --- a/migration/options.h +++ b/migration/options.h @@ -70,6 +70,7 @@ 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_responsive_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 6d8358c202..9f52ed1899 100644 --- a/qapi/migration.json +++ b/qapi/migration.json @@ -734,6 +734,10 @@ # @cpu-periodic-throttle-interval: Interval of the periodic CPU throttling. # (Since 9.1) # +# @cpu-responsive-throttle: Make CPU throttling more responsively by +# introduce an extra detection metric of +# migration convergence. (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 @@ -855,7 +859,7 @@ 'throttle-trigger-threshold', 'cpu-throttle-initial', 'cpu-throttle-increment', 'cpu-throttle-tailslow', 'cpu-periodic-throttle', - 'cpu-periodic-throttle-interval', + 'cpu-periodic-throttle-interval', 'cpu-responsive-throttle', 'tls-creds', 'tls-hostname', 'tls-authz', 'max-bandwidth', 'avail-switchover-bandwidth', 'downtime-limit', { 'name': 'x-checkpoint-delay', 'features': [ 'unstable' ] }, @@ -916,6 +920,10 @@ # @cpu-periodic-throttle-interval: Interval of the periodic CPU throttling. # (Since 9.1) # +# @cpu-responsive-throttle: Make CPU throttling more responsively by +# introduce an extra detection metric of +# migration convergence. (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 @@ -1045,6 +1053,7 @@ '*cpu-throttle-tailslow': 'bool', '*cpu-periodic-throttle': 'bool', '*cpu-periodic-throttle-interval': 'uint8', + '*cpu-responsive-throttle': 'bool', '*tls-creds': 'StrOrNull', '*tls-hostname': 'StrOrNull', '*tls-authz': 'StrOrNull', @@ -1132,6 +1141,10 @@ # @cpu-periodic-throttle-interval: Interval of the periodic CPU throttling. # (Since 9.1) # +# @cpu-responsive-throttle: Make CPU throttling more responsively by +# introduce an extra detection metric of +# migration convergence. (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 @@ -1254,6 +1267,7 @@ '*cpu-throttle-tailslow': 'bool', '*cpu-periodic-throttle': 'bool', '*cpu-periodic-throttle-interval': 'uint8', + '*cpu-responsive-throttle': 'bool', '*tls-creds': 'str', '*tls-hostname': 'str', '*tls-authz': 'str',