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Wed, 08 Feb 2023 09:14:12 -0500 Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [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-556-bSi-kNUuN0GJbuEUpyOhIA-1; Wed, 08 Feb 2023 09:14:06 -0500 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id B582038123B2 for ; Wed, 8 Feb 2023 14:14:05 +0000 (UTC) Received: from secure.mitica (unknown [10.39.192.29]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0E3674024A7E; Wed, 8 Feb 2023 14:14:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1675865650; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=xvXkxKsAOikmZP/NIu+FPJ9viarjOcEgOwoOnbYoM5k=; b=Tp6pNKrtyFES0YckLypEIl/vvfVrP0mnKknv0HOEpCAWKlu/5qgmRivZ0U8V5qSgEjg/tG lj4NrEVAVtO2P5BBuUXwnLXQ9KIp7ZYpKqa2O23kGPdWMpGwTm0LUS9H0C/o/C1D9dRGn6 mX4Qgk9IyruuC38xT9YSlz3Epio2DZ4= X-MC-Unique: bSi-kNUuN0GJbuEUpyOhIA-1 From: Juan Quintela To: qemu-devel@nongnu.org Cc: Juan Quintela , "Dr. David Alan Gilbert" Subject: [PATCH v3 2/2] migration: Calculate ram size once Date: Wed, 8 Feb 2023 15:14:02 +0100 Message-Id: <20230208141402.18865-3-quintela@redhat.com> In-Reply-To: <20230208141402.18865-1-quintela@redhat.com> References: <20230208141402.18865-1-quintela@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.1 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=quintela@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_H2=-0.001, 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1675865706961100001 Content-Type: text/plain; charset="utf-8" We are recalculating ram size continously, when we know that it don't change during migration. Create a field in RAMState to track it. Signed-off-by: Juan Quintela Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- migration/ram.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/migration/ram.c b/migration/ram.c index 24c96ea822..bc424b14a7 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -330,6 +330,8 @@ struct RAMState { PageSearchStatus pss[RAM_CHANNEL_MAX]; /* UFFD file descriptor, used in 'write-tracking' migration */ int uffdio_fd; + /* total ram size in bytes */ + uint64_t ram_bytes_total; /* Last block that we have visited searching for dirty pages */ RAMBlock *last_seen_block; /* Last dirty target page we have sent */ @@ -2545,7 +2547,7 @@ static int ram_find_and_save_block(RAMState *rs) bool again, found; =20 /* No dirty page as there is zero RAM */ - if (!ram_bytes_total()) { + if (!rs->ram_bytes_total) { return pages; } =20 @@ -3004,13 +3006,14 @@ static int ram_state_init(RAMState **rsp) qemu_mutex_init(&(*rsp)->bitmap_mutex); qemu_mutex_init(&(*rsp)->src_page_req_mutex); QSIMPLEQ_INIT(&(*rsp)->src_page_requests); + (*rsp)->ram_bytes_total =3D ram_bytes_total(); =20 /* * Count the total number of pages used by ram blocks not including any * gaps due to alignment or unplugs. * This must match with the initial values of dirty bitmap. */ - (*rsp)->migration_dirty_pages =3D ram_bytes_total() >> TARGET_PAGE_BIT= S; + (*rsp)->migration_dirty_pages =3D (*rsp)->ram_bytes_total >> TARGET_PA= GE_BITS; ram_state_reset(*rsp); =20 return 0; --=20 2.39.1