From patchwork Mon Sep 21 14:49:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Vivier X-Patchwork-Id: 11790271 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 614BB618 for ; Mon, 21 Sep 2020 14:52:02 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id F1CDE2220C for ; Mon, 21 Sep 2020 14:52:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="NpD9W2hh" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org F1CDE2220C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:43704 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kKNAf-0003V3-59 for patchwork-qemu-devel@patchwork.kernel.org; Mon, 21 Sep 2020 10:52:01 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:55078) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kKN8p-00029M-N9 for qemu-devel@nongnu.org; Mon, 21 Sep 2020 10:50:07 -0400 Received: from us-smtp-2.mimecast.com ([205.139.110.61]:48079 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kKN8n-0006vK-W4 for qemu-devel@nongnu.org; Mon, 21 Sep 2020 10:50:07 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600699804; 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; bh=3WzGrEk7LJF27bzBlvVxL8fkxPACnpxoOcteojtSwH8=; b=NpD9W2hhrousu7TxYiK77ck3wBfSCfpfsiJ8z8GNEhbUvizN70hzu/IwJZloyL4oSqzsm6 sYFYTVb3SN7QiG8VzpFfYZJaHrtnin7YDdfsJV/SNCrSQGHD1KC5Tll00JkyiBff0JZCbI nMlVaw7WcU/R6P8uHhc+AcW438Zd/cA= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-218-KRZvT2xUMhiSy6UAmjpllA-1; Mon, 21 Sep 2020 10:50:01 -0400 X-MC-Unique: KRZvT2xUMhiSy6UAmjpllA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C63A4802B51; Mon, 21 Sep 2020 14:50:00 +0000 (UTC) Received: from thinkpad.redhat.com (ovpn-113-15.ams2.redhat.com [10.36.113.15]) by smtp.corp.redhat.com (Postfix) with ESMTP id D3F9460C13; Mon, 21 Sep 2020 14:49:58 +0000 (UTC) From: Laurent Vivier To: qemu-devel@nongnu.org Subject: [PATCH] migration: increase max-bandwidth to 128 MiB/s (1 Gib/s) Date: Mon, 21 Sep 2020 16:49:57 +0200 Message-Id: <20200921144957.979989-1-lvivier@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=lvivier@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=205.139.110.61; envelope-from=lvivier@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/21 04:38:49 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.455, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , Juan Quintela , Greg Kurz , "Dr. David Alan Gilbert" , Andrea Bolognani , David Gibson , Frediano Ziglio Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" max-bandwidth is set by default to 32 MiB/s (256 Mib/s) since 2008 (5bb7910af031c). Most of the CPUs can dirty memory faster than that now, and this is clearly a problem with POWER where the page size is 64 kiB and not 4 KiB. Signed-off-by: Laurent Vivier Reviewed-by: David Gibson Reviewed-by: Greg Kurz Reviewed-by: Dr. David Alan Gilbert --- migration/migration.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/migration/migration.c b/migration/migration.c index 58a5452471f9..1c4174947181 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -57,7 +57,7 @@ #include "qemu/queue.h" #include "multifd.h" -#define MAX_THROTTLE (32 << 20) /* Migration transfer speed throttling */ +#define MAX_THROTTLE (128 << 20) /* Migration transfer speed throttling */ /* Amount of time to allocate to each "chunk" of bandwidth-throttled * data. */