From patchwork Wed Jul 20 11:18:58 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Dr. David Alan Gilbert" X-Patchwork-Id: 12923826 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 3C0B4C433EF for ; Wed, 20 Jul 2022 11:29:21 +0000 (UTC) Received: from localhost ([::1]:46938 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oE7tI-0002df-8v for qemu-devel@archiver.kernel.org; Wed, 20 Jul 2022 07:29:20 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:58546) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oE7k0-0004AC-TH for qemu-devel@nongnu.org; Wed, 20 Jul 2022 07:19:44 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:54957) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oE7jz-000087-CS for qemu-devel@nongnu.org; Wed, 20 Jul 2022 07:19:44 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1658315982; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=WKxOT9QkutZ1Un3AMJ7AFXf8KUpR9tvj3XlvFmqNzN4=; b=KHkT5iidOXkWe+O1hCCARwGPPLjhqHLlMkJNz1U7t5cK32sWmxXt1Kzt8SEyrol6NMK+88 q8bBmi7/N2r5eFFceZSqlD6JaFyZvsrKy671nY7oNyogM1IBf/n30tUBQbF6fPGd8b40zU 86JxnWmhLlzY82X/DvEtizGrM8OSiG0= 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-121-cKvdxpYYPoyzh-sFcY1RrA-1; Wed, 20 Jul 2022 07:19:35 -0400 X-MC-Unique: cKvdxpYYPoyzh-sFcY1RrA-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 18FD71C0514E; Wed, 20 Jul 2022 11:19:35 +0000 (UTC) Received: from dgilbert-t580.localhost (unknown [10.33.36.158]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1F9CC2166B26; Wed, 20 Jul 2022 11:19:34 +0000 (UTC) From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, leobras@redhat.com, quintela@redhat.com, berrange@redhat.com, peterx@redhat.com, iii@linux.ibm.com, huangy81@chinatelecom.cn Subject: [PULL 02/30] cpus: Introduce cpu_list_generation_id Date: Wed, 20 Jul 2022 12:18:58 +0100 Message-Id: <20220720111926.107055-3-dgilbert@redhat.com> In-Reply-To: <20220720111926.107055-1-dgilbert@redhat.com> References: <20220720111926.107055-1-dgilbert@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 Received-SPF: pass client-ip=170.10.129.124; envelope-from=dgilbert@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Hyman Huang(黄勇) Introduce cpu_list_generation_id to track cpu list generation so that cpu hotplug/unplug can be detected during measurement of dirty page rate. cpu_list_generation_id could be used to detect changes of cpu list, which is prepared for dirty page rate measurement. Signed-off-by: Hyman Huang(黄勇) Reviewed-by: Peter Xu Message-Id: <06e1f1362b2501a471dce796abb065b04f320fa5.1656177590.git.huangy81@chinatelecom.cn> Signed-off-by: Dr. David Alan Gilbert --- cpus-common.c | 8 ++++++++ include/exec/cpu-common.h | 1 + 2 files changed, 9 insertions(+) diff --git a/cpus-common.c b/cpus-common.c index db459b41ce..793364dc0e 100644 --- a/cpus-common.c +++ b/cpus-common.c @@ -73,6 +73,12 @@ static int cpu_get_free_index(void) } CPUTailQ cpus = QTAILQ_HEAD_INITIALIZER(cpus); +static unsigned int cpu_list_generation_id; + +unsigned int cpu_list_generation_id_get(void) +{ + return cpu_list_generation_id; +} void cpu_list_add(CPUState *cpu) { @@ -84,6 +90,7 @@ void cpu_list_add(CPUState *cpu) assert(!cpu_index_auto_assigned); } QTAILQ_INSERT_TAIL_RCU(&cpus, cpu, node); + cpu_list_generation_id++; } void cpu_list_remove(CPUState *cpu) @@ -96,6 +103,7 @@ void cpu_list_remove(CPUState *cpu) QTAILQ_REMOVE_RCU(&cpus, cpu, node); cpu->cpu_index = UNASSIGNED_CPU_INDEX; + cpu_list_generation_id++; } CPUState *qemu_get_cpu(int index) diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h index 5968551a05..2281be4e10 100644 --- a/include/exec/cpu-common.h +++ b/include/exec/cpu-common.h @@ -35,6 +35,7 @@ extern intptr_t qemu_host_page_mask; void qemu_init_cpu_list(void); void cpu_list_lock(void); void cpu_list_unlock(void); +unsigned int cpu_list_generation_id_get(void); void tcg_flush_softmmu_tlb(CPUState *cs);