Received: by 2002:a05:6358:c692:b0:131:369:b2a3 with SMTP id fe18csp2214326rwb; Sat, 29 Jul 2023 02:10:58 -0700 (PDT) X-Google-Smtp-Source: APBJJlFU2Lb3gaq+PxNZGUh0TYWCxoq0Kjd2bYnc2viw/PDTpYtdNKkxezt2W9ObBQXDq/Yo75zY X-Received: by 2002:a05:6a00:88e:b0:681:3ed2:b493 with SMTP id q14-20020a056a00088e00b006813ed2b493mr4876041pfj.26.1690621857795; Sat, 29 Jul 2023 02:10:57 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1690621857; cv=none; d=google.com; s=arc-20160816; b=gLOJTWj7drtDgo235lYz77uj/xMN/k/2Okoj2KGUzYdD7NixCcUJ5LZwqiabYdCr+F f/PAOugy1Yp2QQ4mdCJ9TaWtzkdhgT34N/ZLWab6mba2x3qi7kyUNbV15+KLX/SLDKPD D2Ub8Yy6sZ3nZdA3BNWMWVVLKPtfH3GpwHB3I3ZUVFAWfzsRqZv74G+mIYh21zcnv9Dp YkjmIvoNeh/ZeiSEdsK/+6V9TrFXs8jsEH54Ko6PmVI8WUgOQNmiokObXa+PQ+fJjYK9 Z/AbBgg/KWjtD4TkczBa5Sufzx8CJxrcSpizYySf3icS5iaqCLpFAXGZBCF4yrOCzhNZ KGsg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:user-agent:in-reply-to:content-transfer-encoding :content-disposition:mime-version:references:message-id:subject:cc :to:from:date; bh=hNXU32hJuERBOUzHeknbnxSMgqiWIuss2VoAS0Zisrk=; fh=oktyAfFvTnnUlva8uVXG0N5h1nuGusaZzz++FhWKS4s=; b=sJGkGtk/h18Ewzz4bCj9bHsgXeRa0Y38Gwf0bncf2brsFfuPkCMe/DHU+aKczpkta0 1Mq3RCys5NVcdEH5qu8a6InK5eVxOUKvOfdLYuG/kks8rvX8d0qyP7yvSuTN7QgzRAjE 2uPr2Kl0slEl8IL9WBv1SlwcxHSHP4QHZdAvdzqCIKap4eZrEbpH3qnwx3FQz4ONih6T eCauJsA8Z6hSWwN1nVy4ncMrAS4VM3wl8gJxhEJmiHtCAtKEmVA5zewg2Zp8pTyb4dDJ /0DO2xQJcE/fPOBIx4QzdvEzj1pc4M8WJhX3Yyv0b0Uj6TyXMbITydTUOGriatzo/rb1 HUnw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id x7-20020a056a00270700b00665e0165510si4274485pfv.252.2023.07.29.02.10.45; Sat, 29 Jul 2023 02:10:57 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231154AbjG2Ibi (ORCPT + 99 others); Sat, 29 Jul 2023 04:31:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60656 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230471AbjG2Ibg (ORCPT ); Sat, 29 Jul 2023 04:31:36 -0400 Received: from 1wt.eu (ded1.1wt.eu [163.172.96.212]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 8E36E448C; Sat, 29 Jul 2023 01:31:35 -0700 (PDT) Received: (from willy@localhost) by pcw.home.local (8.15.2/8.15.2/Submit) id 36T8VSM9004422; Sat, 29 Jul 2023 10:31:28 +0200 Date: Sat, 29 Jul 2023 10:31:28 +0200 From: Willy Tarreau To: Thomas =?iso-8859-1?Q?Wei=DFschuh?= Cc: Zhangjin Wu , arnd@arndb.de, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: Re: [PATCH v3 12/12] selftests/nolibc: speed up some targets with multiple jobs Message-ID: <20230729083128.GM956@1wt.eu> References: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_PASS, SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Jul 29, 2023 at 08:44:32AM +0200, Thomas Wei?schuh wrote: > On 2023-07-28 04:35:01+0800, Zhangjin Wu wrote: > > The sysroot install and kernel build targets are time cost, let's use > > -j to parallelize them with multiple jobs. > > > > Signed-off-by: Zhangjin Wu > > --- > > tools/testing/selftests/nolibc/Makefile | 4 ++-- > > 1 file changed, 2 insertions(+), 2 deletions(-) > > > > diff --git a/tools/testing/selftests/nolibc/Makefile b/tools/testing/selftests/nolibc/Makefile > > index ad2538ec5eb0..1b45c22f9a94 100644 > > --- a/tools/testing/selftests/nolibc/Makefile > > +++ b/tools/testing/selftests/nolibc/Makefile > > @@ -171,7 +171,7 @@ PHONY = sysroot/$(ARCH)/include > > sysroot/$(ARCH)/include: > > $(Q)rm -rf sysroot/$(ARCH) sysroot/sysroot > > $(QUIET_MKDIR)mkdir -p sysroot > > - $(Q)$(MAKE) -C ../../../include/nolibc ARCH=$(ARCH) OUTPUT=$(CURDIR)/sysroot/ headers_standalone > > + $(Q)$(MAKE) -j$$(nproc) -C ../../../include/nolibc ARCH=$(ARCH) OUTPUT=$(CURDIR)/sysroot/ headers_standalone > > This should already work when the users specify -j on the make command > line themselves. > I'm not a fan of force-enabling it here. Indeed, we must not do that, because some users might for instance prefer to build multiple archs in parallel and benefit from a better parallelism and now they'd end up with too many processes. Willy