From nobody Tue Feb 10 02:00:22 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; dmarc=fail(p=none dis=none) header.from=git.sr.ht Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1688536303135879.5593667895059; Tue, 4 Jul 2023 22:51:43 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qGvOX-0005VX-1B; Wed, 05 Jul 2023 01:49:41 -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 1qGvOJ-0005Sf-87 for qemu-devel@nongnu.org; Wed, 05 Jul 2023 01:49:27 -0400 Received: from mail-b.sr.ht ([173.195.146.151]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qGvOG-00085V-A0 for qemu-devel@nongnu.org; Wed, 05 Jul 2023 01:49:25 -0400 Received: from git.sr.ht (unknown [173.195.146.142]) by mail-b.sr.ht (Postfix) with ESMTPSA id F2B5E11F0C0; Wed, 5 Jul 2023 05:49:20 +0000 (UTC) Authentication-Results: mail-b.sr.ht; dkim=none From: ~hyman Date: Thu, 15 Jun 2023 21:29:44 +0800 Subject: [PATCH QEMU v7 6/9] migration: Put the detection logic before auto-converge checking MIME-Version: 1.0 Message-ID: <168853615963.17240.15832775267134683267-6@git.sr.ht> X-Mailer: git.sr.ht In-Reply-To: <168853615963.17240.15832775267134683267-0@git.sr.ht> To: qemu-devel Cc: Peter Xu , Paolo Bonzini , Juan Quintela , "Dr. David Alan Gilbert" , Eric Blake , Markus Armbruster , Thomas Huth , Laurent Vivier , Richard Henderson , Philippe =?utf-8?q?Mathieu-Daud=C3=A9?= , Hyman =?utf-8?b?SHVhbmco6buE5YuHKQ==?= 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=173.195.146.151; envelope-from=outgoing@sr.ht; helo=mail-b.sr.ht X-Spam_score_int: 15 X-Spam_score: 1.5 X-Spam_bar: + X-Spam_report: (1.5 / 5.0 requ) BAYES_00=-1.9, DATE_IN_PAST_96_XX=3.405, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no 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: , Reply-To: ~hyman Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1688536305091100001 From: Hyman Huang(=E9=BB=84=E5=8B=87) This commit is prepared for the implementation of dirty-limit convergence algo. The detection logic of throttling condition can apply to both auto-converge and dirty-limit algo, putting it's position before the checking logic for auto-converge feature. Signed-off-by: Hyman Huang(=E9=BB=84=E5=8B=87) Reviewed-by: Juan Quintela --- migration/ram.c | 21 +++++++++++---------- 1 file changed, 11 insertions(+), 10 deletions(-) diff --git a/migration/ram.c b/migration/ram.c index 78746849b5..b6559f9312 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -999,17 +999,18 @@ static void migration_trigger_throttle(RAMState *rs) return; } =20 - if (migrate_auto_converge()) { - /* The following detection logic can be refined later. For now: - Check to see if the ratio between dirtied bytes and the approx. - amount of bytes that just got transferred since the last time - we were in this routine reaches the threshold. If that happens - twice, start or increase throttling. */ - - if ((bytes_dirty_period > bytes_dirty_threshold) && - (++rs->dirty_rate_high_cnt >=3D 2)) { + /* + * The following detection logic can be refined later. For now: + * Check to see if the ratio between dirtied bytes and the approx. + * amount of bytes that just got transferred since the last time + * we were in this routine reaches the threshold. If that happens + * twice, start or increase throttling. + */ + if ((bytes_dirty_period > bytes_dirty_threshold) && + (++rs->dirty_rate_high_cnt >=3D 2)) { + rs->dirty_rate_high_cnt =3D 0; + if (migrate_auto_converge()) { trace_migration_throttle(); - rs->dirty_rate_high_cnt =3D 0; mig_throttle_guest_down(bytes_dirty_period, bytes_dirty_threshold); } --=20 2.38.5