From nobody Mon Feb 9 14:34:26 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1647397630136918.3257890906752; Tue, 15 Mar 2022 19:27:10 -0700 (PDT) Received: from localhost ([::1]:45734 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nUJNV-0008DJ-4a for importer@patchew.org; Tue, 15 Mar 2022 22:27:09 -0400 Received: from eggs.gnu.org ([209.51.188.92]:60882) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nUJIk-0008WA-OF for qemu-devel@nongnu.org; Tue, 15 Mar 2022 22:22:14 -0400 Received: from prt-mail.chinatelecom.cn ([42.123.76.228]:33601 helo=chinatelecom.cn) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nUJIh-0001Ns-Um for qemu-devel@nongnu.org; Tue, 15 Mar 2022 22:22:14 -0400 Received: from clientip-182.150.57.243 (unknown [172.18.0.188]) by chinatelecom.cn (HERMES) with SMTP id A2EC72800F1; Wed, 16 Mar 2022 10:22:06 +0800 (CST) Received: from ([172.18.0.188]) by app0023 with ESMTP id b22d7a3dd8fe4848996a9a2ad5514acb for qemu-devel@nongnu.org; Wed, 16 Mar 2022 10:22:10 CST HMM_SOURCE_IP: 172.18.0.188:44508.143425817 HMM_ATTACHE_NUM: 0000 HMM_SOURCE_TYPE: SMTP X-189-SAVE-TO-SEND: +huangy81@chinatelecom.cn X-Transaction-ID: b22d7a3dd8fe4848996a9a2ad5514acb X-Real-From: huangy81@chinatelecom.cn X-Receive-IP: 172.18.0.188 X-MEDUSA-Status: 0 From: huangy81@chinatelecom.cn To: qemu-devel Subject: [PATCH v20 4/9] softmmu/dirtylimit: Implement vCPU dirtyrate calculation periodically Date: Wed, 16 Mar 2022 10:21:34 +0800 Message-Id: <789f4a79177a86ecfbb0ddeec7a967dedc1c2a55.1647396907.git.huangy81@chinatelecom.cn> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: References: In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable 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=42.123.76.228; envelope-from=huangy81@chinatelecom.cn; helo=chinatelecom.cn 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, SPF_HELO_PASS=-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: , Cc: Eduardo Habkost , Juan Quintela , Hyman , David Hildenbrand , Richard Henderson , Markus Armbruster , Peter Xu , "Dr. David Alan Gilbert" , Paolo Bonzini , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZM-MESSAGEID: 1647397632320100001 From: Hyman Huang(=E9=BB=84=E5=8B=87) Introduce the third method GLOBAL_DIRTY_LIMIT of dirty tracking for calculate dirtyrate periodly for dirty page rate limit. Add dirtylimit.c to implement dirtyrate calculation periodly, which will be used for dirty page rate limit. Add dirtylimit.h to export util functions for dirty page rate limit implementation. Signed-off-by: Hyman Huang(=E9=BB=84=E5=8B=87) Reviewed-by: Peter Xu --- include/exec/memory.h | 5 +- include/sysemu/dirtylimit.h | 22 +++++++++ softmmu/dirtylimit.c | 116 ++++++++++++++++++++++++++++++++++++++++= ++++ softmmu/meson.build | 1 + 4 files changed, 143 insertions(+), 1 deletion(-) create mode 100644 include/sysemu/dirtylimit.h create mode 100644 softmmu/dirtylimit.c diff --git a/include/exec/memory.h b/include/exec/memory.h index 4d5997e..88ca510 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -69,7 +69,10 @@ static inline void fuzz_dma_read_cb(size_t addr, /* Dirty tracking enabled because measuring dirty rate */ #define GLOBAL_DIRTY_DIRTY_RATE (1U << 1) =20 -#define GLOBAL_DIRTY_MASK (0x3) +/* Dirty tracking enabled because dirty limit */ +#define GLOBAL_DIRTY_LIMIT (1U << 2) + +#define GLOBAL_DIRTY_MASK (0x7) =20 extern unsigned int global_dirty_tracking; =20 diff --git a/include/sysemu/dirtylimit.h b/include/sysemu/dirtylimit.h new file mode 100644 index 0000000..da459f0 --- /dev/null +++ b/include/sysemu/dirtylimit.h @@ -0,0 +1,22 @@ +/* + * Dirty page rate limit common functions + * + * Copyright (c) 2022 CHINA TELECOM CO.,LTD. + * + * Authors: + * Hyman Huang(=E9=BB=84=E5=8B=87) + * + * This work is licensed under the terms of the GNU GPL, version 2 or late= r. + * See the COPYING file in the top-level directory. + */ +#ifndef QEMU_DIRTYRLIMIT_H +#define QEMU_DIRTYRLIMIT_H + +#define DIRTYLIMIT_CALC_TIME_MS 1000 /* 1000ms */ + +int64_t vcpu_dirty_rate_get(int cpu_index); +void vcpu_dirty_rate_stat_start(void); +void vcpu_dirty_rate_stat_stop(void); +void vcpu_dirty_rate_stat_initialize(void); +void vcpu_dirty_rate_stat_finalize(void); +#endif diff --git a/softmmu/dirtylimit.c b/softmmu/dirtylimit.c new file mode 100644 index 0000000..6102e8c --- /dev/null +++ b/softmmu/dirtylimit.c @@ -0,0 +1,116 @@ +/* + * Dirty page rate limit implementation code + * + * Copyright (c) 2022 CHINA TELECOM CO.,LTD. + * + * Authors: + * Hyman Huang(=E9=BB=84=E5=8B=87) + * + * This work is licensed under the terms of the GNU GPL, version 2 or late= r. + * See the COPYING file in the top-level directory. + */ + +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "qemu/main-loop.h" +#include "qapi/qapi-commands-migration.h" +#include "sysemu/dirtyrate.h" +#include "sysemu/dirtylimit.h" +#include "exec/memory.h" +#include "hw/boards.h" + +struct { + VcpuStat stat; + bool running; + QemuThread thread; +} *vcpu_dirty_rate_stat; + +static void vcpu_dirty_rate_stat_collect(void) +{ + VcpuStat stat; + int i =3D 0; + + /* calculate vcpu dirtyrate */ + vcpu_calculate_dirtyrate(DIRTYLIMIT_CALC_TIME_MS, + &stat, + GLOBAL_DIRTY_LIMIT, + false); + + for (i =3D 0; i < stat.nvcpu; i++) { + vcpu_dirty_rate_stat->stat.rates[i].id =3D i; + vcpu_dirty_rate_stat->stat.rates[i].dirty_rate =3D + stat.rates[i].dirty_rate; + } + + free(stat.rates); +} + +static void *vcpu_dirty_rate_stat_thread(void *opaque) +{ + rcu_register_thread(); + + /* start log sync */ + global_dirty_log_change(GLOBAL_DIRTY_LIMIT, true); + + while (qatomic_read(&vcpu_dirty_rate_stat->running)) { + vcpu_dirty_rate_stat_collect(); + } + + /* stop log sync */ + global_dirty_log_change(GLOBAL_DIRTY_LIMIT, false); + + rcu_unregister_thread(); + return NULL; +} + +int64_t vcpu_dirty_rate_get(int cpu_index) +{ + DirtyRateVcpu *rates =3D vcpu_dirty_rate_stat->stat.rates; + return qatomic_read(&rates[cpu_index].dirty_rate); +} + +void vcpu_dirty_rate_stat_start(void) +{ + if (qatomic_read(&vcpu_dirty_rate_stat->running)) { + return; + } + + qatomic_set(&vcpu_dirty_rate_stat->running, 1); + qemu_thread_create(&vcpu_dirty_rate_stat->thread, + "dirtyrate-stat", + vcpu_dirty_rate_stat_thread, + NULL, + QEMU_THREAD_JOINABLE); +} + +void vcpu_dirty_rate_stat_stop(void) +{ + qatomic_set(&vcpu_dirty_rate_stat->running, 0); + qemu_mutex_unlock_iothread(); + qemu_thread_join(&vcpu_dirty_rate_stat->thread); + qemu_mutex_lock_iothread(); +} + +void vcpu_dirty_rate_stat_initialize(void) +{ + MachineState *ms =3D MACHINE(qdev_get_machine()); + int max_cpus =3D ms->smp.max_cpus; + + vcpu_dirty_rate_stat =3D + g_malloc0(sizeof(*vcpu_dirty_rate_stat)); + + vcpu_dirty_rate_stat->stat.nvcpu =3D max_cpus; + vcpu_dirty_rate_stat->stat.rates =3D + g_malloc0(sizeof(DirtyRateVcpu) * max_cpus); + + vcpu_dirty_rate_stat->running =3D false; +} + +void vcpu_dirty_rate_stat_finalize(void) +{ + free(vcpu_dirty_rate_stat->stat.rates); + vcpu_dirty_rate_stat->stat.rates =3D NULL; + + free(vcpu_dirty_rate_stat); + vcpu_dirty_rate_stat =3D NULL; +} diff --git a/softmmu/meson.build b/softmmu/meson.build index 8138248..3272af1 100644 --- a/softmmu/meson.build +++ b/softmmu/meson.build @@ -4,6 +4,7 @@ specific_ss.add(when: 'CONFIG_SOFTMMU', if_true: [files( 'memory.c', 'physmem.c', 'qtest.c', + 'dirtylimit.c', )]) =20 specific_ss.add(when: ['CONFIG_SOFTMMU', 'CONFIG_TCG'], if_true: [files( --=20 1.8.3.1