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 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 29E30ECE579 for ; Mon, 9 Sep 2024 15:35:45 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sngQC-0008Js-Rn; Mon, 09 Sep 2024 11:35:20 -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 1sngQB-0008JH-2C for qemu-devel@nongnu.org; Mon, 09 Sep 2024 11:35:19 -0400 Received: from mail-lj1-x230.google.com ([2a00:1450:4864:20::230]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1sngQ9-0003Dr-CR for qemu-devel@nongnu.org; Mon, 09 Sep 2024 11:35:18 -0400 Received: by mail-lj1-x230.google.com with SMTP id 38308e7fff4ca-2f760f7e25bso16184261fa.2 for ; Mon, 09 Sep 2024 08:35:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1725896115; x=1726500915; darn=nongnu.org; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=GxfKZP8Ad2FL8b3Zz2/iX/CT1VxdkYPkw7K654YdQMk=; b=fR0UokHp78qDbDGYFRh8GXdJm+jVH4tDo3s/9WwX+tdPEvpGti9DB97+PLi5crvFXN 6BbcJQnPEloMyRd0jfYZh1/DU0jtWrz0X4vLV2EthgAGiIdba4WF6Hgewocsnrg9ZqXv qB0FE108/0mHW0skuKX6Gbh1OkGFWwLZAl7MNSoGT4ppjcWb1QMcswJYtSBqRC4DEO7j NvxW8qdP+MubLYieqtN466wmYF4rFxWtbP42/1s0OWmM8ux8ISLs7zHtvPQBEp3HPt22 m2obU2KP3piwr1eB9RuKKtmcdARSCr/AxF0UTA3Axnohxt9Lj6iNNf5N4kBmv6anTC1e Ndiw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1725896115; x=1726500915; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=GxfKZP8Ad2FL8b3Zz2/iX/CT1VxdkYPkw7K654YdQMk=; b=CqADqN6Ef5L2nYC/vQeIVWx1Qv38and30u164ruQgKGpY39ClS20ShvwNexu549oQm HuLpj1Is/KXRW3gZEAG6Qti/DZ4JjewTXujytsfOnkBwWgH+y6ExAY4wNHgtMVJvd1PD 3VpuC9nsUwov06X7rIlB6B+AScdOIC24GgkIpIbHhfpmN5kJRUhktwLjLO06WhfiMLI7 czyhnG12Sm38RScRyYC50dKOGGt+m9/7lqMdjAKtBxk0ZpJxaYb6Oi7f6V38n5dtgbrr pUhAQm0BJ5uspC7CHwAxP1BjC+ZHFAWIgYP/ekc1LYM3tVjawGHnGjtg1Mz71VxVuoyg MgjQ== X-Gm-Message-State: AOJu0YykTIx+mslEzlYUYiVLc7cfSoCXwwswcm49L61S0+X1BxDUq6o5 qK6aYIecxCKGn8MpPqF2pFg+b5XgoHqviMWDYoVffihkUgMN+6FUUyhM/5hW6aNReaVTW6MiItk c+1/HFDY882VnLLFNmiEbIWrW51r+gOfFuqXARQ== X-Google-Smtp-Source: AGHT+IGlhkC8G3tq8kD39qWek5YouLgD0KnA+wlHGmq4p9wadY2tVtnott5enignH3VYFSHK1lbL8Rn5O+DAXxcPk9c= X-Received: by 2002:a2e:b8c7:0:b0:2ef:20ae:d111 with SMTP id 38308e7fff4ca-2f752209e68mr73037761fa.6.1725896115266; Mon, 09 Sep 2024 08:35:15 -0700 (PDT) MIME-Version: 1.0 References: <20240909133921.1141067-1-peter.maydell@linaro.org> <87cylcyhp3.fsf@draig.linaro.org> In-Reply-To: <87cylcyhp3.fsf@draig.linaro.org> From: Peter Maydell Date: Mon, 9 Sep 2024 16:34:56 +0100 Message-ID: Subject: Re: [RFC PATCH] tests/qtest: Don't parallelize migration-test To: =?UTF-8?B?QWxleCBCZW5uw6ll?= Cc: qemu-devel@nongnu.org, =?UTF-8?Q?Daniel_P=2E_Berrang=C3=A9?= Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=2a00:1450:4864:20::230; envelope-from=peter.maydell@linaro.org; helo=mail-lj1-x230.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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: 2.1.29 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-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Mon, 9 Sept 2024 at 16:23, Alex Benn=C3=A9e wro= te: > I guess one question is are we getting value from all the extra > migration tests? There certainly seem to be some sub-tests that are > slower than the others and I assume testing a small delta on the tests > before it. > > On s390x it seems the native test runs pretty much to the same time as > the other TCG guests. Do we exercise any extra migration code by running > tests for every architecture as opposed to one KVM/native hyp and one > TCG one? s390 is an interesting one because Christian pointed out that although it has "KVM" support, we're actually running on a VM under z/VM, and so when we run a CI test under "-accel KVM" that's actually nested-KVM and its effects on the host CPU's TLB could be such that it's actually worse than using TCG... -- PMM