From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A5AF8C43331 for ; Mon, 30 Mar 2020 17:52:13 +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 6E0322073B for ; Mon, 30 Mar 2020 17:52:13 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="WhiHWfmc" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6E0322073B 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+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:54336 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jIya4-0000Gl-F6 for qemu-devel@archiver.kernel.org; Mon, 30 Mar 2020 13:52:12 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:38512) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jIyYM-00065y-EP for qemu-devel@nongnu.org; Mon, 30 Mar 2020 13:50:27 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jIyYL-000318-BI for qemu-devel@nongnu.org; Mon, 30 Mar 2020 13:50:26 -0400 Received: from us-smtp-delivery-74.mimecast.com ([216.205.24.74]:33662) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jIyYL-00030u-6M for qemu-devel@nongnu.org; Mon, 30 Mar 2020 13:50:25 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1585590624; 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: in-reply-to:in-reply-to:references:references; bh=RG/V3JYOMDkYQlsKT0w0240bFCeW3cpzFFEas6F/7Ms=; b=WhiHWfmcPLupKR9qFrY6CPaEmbtsc0IpCLbQkqtCH0CjxuuYk245ZgQYv89nzUtSbS1/8H a63nWQiXGWGyWdihhH9LrUCYxyJLF6hlkN9j38LDi1iC04wq8m5c8GkbSdcHEsW9wak6aG gShEi/zyi9oD0ygFxinhjbEcGRohhUc= 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-297-TYuTy7iYPQW8ufhmqzoPeg-1; Mon, 30 Mar 2020 13:50:23 -0400 X-MC-Unique: TYuTy7iYPQW8ufhmqzoPeg-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 5769518B5FBD for ; Mon, 30 Mar 2020 17:50:22 +0000 (UTC) Received: from work-vm (ovpn-114-162.ams2.redhat.com [10.36.114.162]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 8D92B5C1B5; Mon, 30 Mar 2020 17:50:18 +0000 (UTC) Date: Mon, 30 Mar 2020 18:50:16 +0100 From: "Dr. David Alan Gilbert" To: =?iso-8859-1?Q?Marc-Andr=E9?= Lureau Subject: Re: [PATCH] docs/devel/migration: start a debugging section Message-ID: <20200330175016.GD2843@work-vm> References: <20200330174852.456148-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 In-Reply-To: <20200330174852.456148-1-marcandre.lureau@redhat.com> User-Agent: Mutt/1.13.3 (2020-01-12) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 216.205.24.74 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: qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" * Marc-Andr=E9 Lureau (marcandre.lureau@redhat.com) wrote: > Explain how to use analyze-migration.py, this may help. >=20 > Signed-off-by: Marc-Andr=E9 Lureau Yes, it's quite useful for things like this; although things where multiple instances/instance_id's are the problem can be tricikier and some tracing can help. Reviewed-by: Dr. David Alan Gilbert > --- > docs/devel/migration.rst | 20 ++++++++++++++++++++ > 1 file changed, 20 insertions(+) >=20 > diff --git a/docs/devel/migration.rst b/docs/devel/migration.rst > index e88918f7639..2eb08624fc3 100644 > --- a/docs/devel/migration.rst > +++ b/docs/devel/migration.rst > @@ -50,6 +50,26 @@ All these migration protocols use the same infrastruct= ure to > save/restore state devices. This infrastructure is shared with the > savevm/loadvm functionality. > =20 > +Debugging > +=3D=3D=3D=3D=3D=3D=3D=3D=3D > + > +The migration stream can be analyzed thanks to `scripts/analyze_migratio= n.py`. > + > +Example usage: > + > +.. code-block:: shell > + > + $ qemu-system-x86_64 > + (qemu) migrate "exec:cat > mig" > + $ ./scripts/analyze_migration.py -f mig > + { > + "ram (3)": { > + "section sizes": { > + "pc.ram": "0x0000000008000000", > + ... > + > +See also ``analyze_migration.py -h`` help for more options. > + > Common infrastructure > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > =20 > --=20 > 2.26.0.rc2.42.g98cedd0233 >=20 -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK