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Wed, 02 Aug 2023 03:40:47 -0400 Received: from mimecast-mx02.redhat.com (66.187.233.73 [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-611-s29mGt-6MHelPWAJdIv5TQ-1; Wed, 02 Aug 2023 03:40:43 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id F2B423C0C49C; Wed, 2 Aug 2023 07:40:42 +0000 (UTC) Received: from blackfin.pond.sub.org (unknown [10.39.193.50]) by smtp.corp.redhat.com (Postfix) with ESMTPS id B25301121325; Wed, 2 Aug 2023 07:40:42 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id 9905021E692B; Wed, 2 Aug 2023 09:40:41 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1690962045; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=8ufpZRCzKaHE4CSInvF8HRg3U30lPMJFxYDD3UpeHOw=; b=cm0c2l9P8EoPFruAvgj1prbHSqOkqUaqKef7eR9W1fZDX8ROVKHB2Up08MxDFsISySTQTq Kw2YGNkbcLc7/h88l8/1pGmR2WS+YfBBfGLp3DGuYxqKuDc0uQSqKrMD9RxiGTp2zoQ2hk /FvdHgQr4/ZzOArBLwWxCVzqMVMxtSk= X-MC-Unique: s29mGt-6MHelPWAJdIv5TQ-1 From: Markus Armbruster To: qemu-devel@nongnu.org Cc: richard.henderson@linaro.org, =?UTF-8?q?Hyman=20Huang=28=E9=BB=84=E5=8B=87=29?= Subject: [PULL 1/3] qapi: Reformat the dirty-limit migration doc comments Date: Wed, 2 Aug 2023 09:40:39 +0200 Message-ID: <20230802074041.418954-2-armbru@redhat.com> In-Reply-To: <20230802074041.418954-1-armbru@redhat.com> References: <20230802074041.418954-1-armbru@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.3 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=170.10.129.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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 @redhat.com) X-ZM-MESSAGEID: 1690962116338100001 From: Hyman Huang(=E9=BB=84=E5=8B=87) Reformat the dirty-limit migration doc comments to conform to current conventions as commit a937b6aa739 (qapi: Reformat doc comments to conform to current conventions). Signed-off-by: Hyman Huang(=E9=BB=84=E5=8B=87) Message-ID: <169073570563.19893.2928364761104733482-1@git.sr.ht> Reviewed-by: Markus Armbruster [Whitespace tidied up] Signed-off-by: Markus Armbruster --- qapi/migration.json | 67 ++++++++++++++++++++++----------------------- 1 file changed, 33 insertions(+), 34 deletions(-) diff --git a/qapi/migration.json b/qapi/migration.json index 6b49593d2f..dffa60fd91 100644 --- a/qapi/migration.json +++ b/qapi/migration.json @@ -258,17 +258,17 @@ # blocked. Present and non-empty when migration is blocked. # (since 6.0) # -# @dirty-limit-throttle-time-per-round: Maximum throttle time (in microsec= onds) of virtual -# CPUs each dirty ring full round, w= hich shows how -# MigrationCapability dirty-limit af= fects the guest -# during live migration. (since 8.1) +# @dirty-limit-throttle-time-per-round: Maximum throttle time +# (in microseconds) of virtual CPUs each dirty ring full round, +# which shows how MigrationCapability dirty-limit affects the +# guest during live migration. (Since 8.1) # -# @dirty-limit-ring-full-time: Estimated average dirty ring full time (in = microseconds) -# each dirty ring full round, note that the v= alue equals -# dirty ring memory size divided by average d= irty page rate -# of virtual CPU, which can be used to observ= e the average -# memory load of virtual CPU indirectly. Note= that zero -# means guest doesn't dirty memory (since 8.1) +# @dirty-limit-ring-full-time: Estimated average dirty ring full time +# (in microseconds) for each dirty ring full round. The value +# equals the dirty ring memory size divided by the average dirty +# page rate of the virtual CPU, which can be used to observe the +# average memory load of the virtual CPU indirectly. Note that +# zero means guest doesn't dirty memory. (Since 8.1) # # Since: 0.14 ## @@ -519,15 +519,14 @@ # are present. 'return-path' capability must be enabled to use # it. (since 8.1) # -# @dirty-limit: If enabled, migration will use the dirty-limit algo to -# throttle down guest instead of auto-converge algo. -# Throttle algo only works when vCPU's dirtyrate greater -# than 'vcpu-dirty-limit', read processes in guest os -# aren't penalized any more, so this algo can improve -# performance of vCPU during live migration. This is an -# optional performance feature and should not affect the -# correctness of the existing auto-converge algo. -# (since 8.1) +# @dirty-limit: If enabled, migration will use the dirty-limit +# algorithim to throttle down guest instead of auto-converge +# algorithim. Throttle algorithim only works when vCPU's dirtyrate +# greater than 'vcpu-dirty-limit', read processes in guest os +# aren't penalized any more, so this algorithim can improve +# performance of vCPU during live migration. This is an optional +# performance feature and should not affect the correctness of the +# existing auto-converge algorithim. (Since 8.1) # # Features: # @@ -822,17 +821,17 @@ # Nodes are mapped to their block device name if there is one, and # to their node name otherwise. (Since 5.2) # -# @x-vcpu-dirty-limit-period: Periodic time (in milliseconds) of dirty lim= it during -# live migration. Should be in the range 1 to = 1000ms, -# defaults to 1000ms. (Since 8.1) +# @x-vcpu-dirty-limit-period: Periodic time (in milliseconds) of dirty +# limit during live migration. Should be in the range 1 to 1000ms. +# Defaults to 1000ms. (Since 8.1) # # @vcpu-dirty-limit: Dirtyrate limit (MB/s) during live migration. -# Defaults to 1. (Since 8.1) +# Defaults to 1. (Since 8.1) # # Features: # # @unstable: Members @x-checkpoint-delay and @x-vcpu-dirty-limit-period -# are experimental. +# are experimental. # # Since: 2.4 ## @@ -988,17 +987,17 @@ # Nodes are mapped to their block device name if there is one, and # to their node name otherwise. (Since 5.2) # -# @x-vcpu-dirty-limit-period: Periodic time (in milliseconds) of dirty lim= it during -# live migration. Should be in the range 1 to = 1000ms, -# defaults to 1000ms. (Since 8.1) +# @x-vcpu-dirty-limit-period: Periodic time (in milliseconds) of dirty +# limit during live migration. Should be in the range 1 to 1000ms. +# Defaults to 1000ms. (Since 8.1) # # @vcpu-dirty-limit: Dirtyrate limit (MB/s) during live migration. -# Defaults to 1. (Since 8.1) +# Defaults to 1. (Since 8.1) # # Features: # # @unstable: Members @x-checkpoint-delay and @x-vcpu-dirty-limit-period -# are experimental. +# are experimental. # # TODO: either fuse back into MigrationParameters, or make # MigrationParameters members mandatory @@ -1191,17 +1190,17 @@ # Nodes are mapped to their block device name if there is one, and # to their node name otherwise. (Since 5.2) # -# @x-vcpu-dirty-limit-period: Periodic time (in milliseconds) of dirty lim= it during -# live migration. Should be in the range 1 to = 1000ms, -# defaults to 1000ms. (Since 8.1) +# @x-vcpu-dirty-limit-period: Periodic time (in milliseconds) of dirty +# limit during live migration. Should be in the range 1 to 1000ms. +# Defaults to 1000ms. (Since 8.1) # # @vcpu-dirty-limit: Dirtyrate limit (MB/s) during live migration. -# Defaults to 1. (Since 8.1) +# Defaults to 1. (Since 8.1) # # Features: # # @unstable: Members @x-checkpoint-delay and @x-vcpu-dirty-limit-period -# are experimental. +# are experimental. # # Since: 2.4 ## --=20 2.41.0 From nobody Fri May 17 05:49:55 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1690962135; cv=none; d=zohomail.com; s=zohoarc; b=AnbD/ZQaRfzrnDzIk5QGBmyK4T+cXAhBBoJ7Eiz70dSm0px5i5OD268wawYfMCxMWdM8zHr4pleDTvhFwSf3DsExF/CzBG3yqY3Nie137VicBZCrLCZubxM81nLNSuhflnCJwX9IkLHgGI6c6EkM238SCdNquKiZGbZOfyud128= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1690962135; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; 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Wed, 2 Aug 2023 09:40:41 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1690962046; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=WHGIBvyI71pEDYrYkMQvIXEfHIvs3P71kefmtbODzU8=; b=DWDddkk3qPxRln5fYw16SO0S2ugW4KmTx9flrB1ESlWGTxTWHyB4sN/Ed1YCKWo/K2ewSe RRFW6Y64i+Q3SaGnB6QXW9vy2zwZ5prmvBrgZCWW+Y2WC5CTHxYrVwDDfjlZADmXsrV+WT Wf0k+Zhr/uSR9aPIR5XlCpCR07USKGU= X-MC-Unique: ak5Ssox8MoWOeS2cheIo9g-1 From: Markus Armbruster To: qemu-devel@nongnu.org Cc: richard.henderson@linaro.org, =?UTF-8?q?Hyman=20Huang=28=E9=BB=84=E5=8B=87=29?= Subject: [PULL 2/3] qapi: Craft the dirty-limit capability comment Date: Wed, 2 Aug 2023 09:40:40 +0200 Message-ID: <20230802074041.418954-3-armbru@redhat.com> In-Reply-To: <20230802074041.418954-1-armbru@redhat.com> References: <20230802074041.418954-1-armbru@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 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=170.10.133.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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 @redhat.com) X-ZM-MESSAGEID: 1690962137350100001 From: Hyman Huang(=E9=BB=84=E5=8B=87) Signed-off-by: Hyman Huang(=E9=BB=84=E5=8B=87) Message-ID: <169073570563.19893.2928364761104733482-2@git.sr.ht> Reviewed-by: Markus Armbruster Signed-off-by: Markus Armbruster --- qapi/migration.json | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/qapi/migration.json b/qapi/migration.json index dffa60fd91..8843e74b59 100644 --- a/qapi/migration.json +++ b/qapi/migration.json @@ -519,14 +519,11 @@ # are present. 'return-path' capability must be enabled to use # it. (since 8.1) # -# @dirty-limit: If enabled, migration will use the dirty-limit -# algorithim to throttle down guest instead of auto-converge -# algorithim. Throttle algorithim only works when vCPU's dirtyrate -# greater than 'vcpu-dirty-limit', read processes in guest os -# aren't penalized any more, so this algorithim can improve -# performance of vCPU during live migration. This is an optional -# performance feature and should not affect the correctness of the -# existing auto-converge algorithim. (Since 8.1) +# @dirty-limit: If enabled, migration will throttle vCPUs as needed to +# keep their dirty page rate within @vcpu-dirty-limit. This can +# improve responsiveness of large guests during live migration, +# and can result in more stable read performance. Requires KVM +# with accelerator property "dirty-ring-size" set. 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bh=yr0Dx2kFg+v8eOxf6HeNS5jOdDpS9MMRAQEAlHDvYNM=; b=QfEbyx+5iey27az5MtS2MjeOGMoVHWlkhmhL0JY4n4l1PLEbg7KMexgfh6D31cl8b0tHyP 01KyNE3ObGl+QNwV33yKFa6qdONzg450ZE9pGzQuoQJVYRRVK5AW4vHLbiHQ6Mm6O34TO8 HmIFELweQXLmF1SxbIR0o2jnRU8T6xE= X-MC-Unique: RcuxCIgIOveix2XWep9HZw-1 From: Markus Armbruster To: qemu-devel@nongnu.org Cc: richard.henderson@linaro.org, =?UTF-8?q?Hyman=20Huang=28=E9=BB=84=E5=8B=87=29?= , Peter Xu Subject: [PULL 3/3] MAINTAINERS: Add section "Migration dirty limit and dirty page rate" Date: Wed, 2 Aug 2023 09:40:41 +0200 Message-ID: <20230802074041.418954-4-armbru@redhat.com> In-Reply-To: <20230802074041.418954-1-armbru@redhat.com> References: <20230802074041.418954-1-armbru@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 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=170.10.129.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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 @redhat.com) X-ZM-MESSAGEID: 1690962120018100009 From: Hyman Huang(=E9=BB=84=E5=8B=87) I've built interests in dirty limit and dirty page rate features and also have been working on projects related to this subsystem. Add a section to the MAINTAINERS file for migration dirty limit and dirty page rate. Add myself as a maintainer for this subsystem so that I can help to improve the dirty limit algorithm and review the patches about dirty page rate. Signed-off-by: Hyman Huang(=E9=BB=84=E5=8B=87) Acked-by: Peter Xu Message-ID: <169073570563.19893.2928364761104733482-3@git.sr.ht> Acked-by: Markus Armbruster Signed-off-by: Markus Armbruster --- MAINTAINERS | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 12e59b6b27..6111b6b4d9 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3209,6 +3209,15 @@ F: qapi/migration.json F: tests/migration/ F: util/userfaultfd.c =20 +Migration dirty limit and dirty page rate +M: Hyman Huang +S: Maintained +F: softmmu/dirtylimit.c +F: include/sysemu/dirtylimit.h +F: migration/dirtyrate.c +F: migration/dirtyrate.h +F: include/sysemu/dirtyrate.h + D-Bus M: Marc-Andr=C3=A9 Lureau S: Maintained --=20 2.41.0