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 B541DFA3755 for ; Fri, 13 Sep 2024 14:06:18 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sp6vi-0006Do-FR; Fri, 13 Sep 2024 10:05:46 -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 1sp6vf-0006D5-Aw for qemu-devel@nongnu.org; Fri, 13 Sep 2024 10:05:43 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sp6vd-0000E2-L3 for qemu-devel@nongnu.org; Fri, 13 Sep 2024 10:05:43 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1726236340; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:in-reply-to:in-reply-to: references:references; bh=I4GXT4ARceORrLct4ze+iAWuIeQJADysdXSXJzG4FlU=; b=i1+YxPpPXtZlS13FjPK4/cqKG7he8KsHToHBZuomip5sdGwXBX/G/oSvZ/f8OevuUrs/YP WHlLrJchT/hYe8R6931PdB9/eMc+XWWQKPd6JLc9u9SJOKqwsDtx9JfgVIiFwAbS4QDP5I J+yod4iw6x/J3+QBCl5VAl32bn3PGg8= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-633-zUV5UQrTP2e2ONWyCEc7Tw-1; Fri, 13 Sep 2024 10:05:38 -0400 X-MC-Unique: zUV5UQrTP2e2ONWyCEc7Tw-1 Received: from mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.40]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 9D6B11955F3E; Fri, 13 Sep 2024 14:05:37 +0000 (UTC) Received: from redhat.com (unknown [10.42.28.224]) by mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 61EFF19560AA; Fri, 13 Sep 2024 14:05:36 +0000 (UTC) Date: Fri, 13 Sep 2024 15:05:33 +0100 From: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= To: Peter Maydell Cc: qemu-devel@nongnu.org, Thomas Huth Subject: Re: [PATCH v2] .gitlab-ci.d/crossbuilds.yml: Force 'make check' single-threaded for cross-i686-tci Message-ID: References: <20240912151003.2045031-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/2.2.12 (2023-09-09) X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 Received-SPF: pass client-ip=170.10.129.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.147, 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_H3=0.001, RCVD_IN_MSPIKE_WL=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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Daniel =?utf-8?B?UC4gQmVycmFuZ8Op?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Fri, Sep 13, 2024 at 02:31:34PM +0100, Peter Maydell wrote: > On Fri, 13 Sept 2024 at 13:24, Peter Maydell wrote: > > > > On Thu, 12 Sept 2024 at 16:10, Peter Maydell wrote: > > > > > > The cross-i686-tci CI job is persistently flaky with various tests > > > hitting timeouts. One theory for why this is happening is that we're > > > running too many tests in parallel and so sometimes a test gets > > > starved of CPU and isn't able to complete within the timeout. > > > > > > (The environment this CI job runs in seems to cause us to default > > > to a parallelism of 9 in the main CI.) > > > > > > Signed-off-by: Peter Maydell > > > --- > > > If this works we might be able to wind this up to -j2 or -j3, > > > and/or consider whether other CI jobs need something similar. > > > > I gave this a try, but unfortunately the result seems to be > > that the whole job times out: > > https://gitlab.com/qemu-project/qemu/-/jobs/7818441897 > > ...but then this simple retry passed with a runtime of 47 mins: > > https://gitlab.com/qemu-project/qemu/-/jobs/7819225200 > > I'm tempted to commit this as-is, and see whether it helps. > If it doesn't I can always back it off to -j2, and if it does > generate a lot of full-job-timeouts it's only me it's annoying. Anyone know how many vCPUs our k8s runners have ? The gitlab runners that contributor forks use will have 2 vCPUs. So our current make -j$(nproc+1) will be effectively -j3 already in pipelines for forks. IOW, we intentionally slightly over-commit CPUs right now. Backing off to just -j$(nproc) may be better than hardcoding -j1/-j2, so that it takes account of different runner sizes ? With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|