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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 8AA34C88E4A for ; Fri, 11 Sep 2026 11:29:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=oVc5/PnbOi1KlSnCRg+axmaRfq+PUwOs8fTBvtWBGz4=; b=sGbBFnb3bXyxIM b+YSBnM5pGKORL9MHKDuOXWV62M874r4MTtZwHc5jM6tSLpjDI/Q/fBdi1r9VJOWkZMpG0fowoMxP qdcBxpfbIBKwq+23ImlnkvUHcLAon196yAHMVZg3aLuANJDmO87im19sHz5QimOsG044Tevk2BAyT VtElVy9NFi92QL8ZgCdWwa2/IaeA3jztcquOxSlKyfSnci2SMHClLBsu5SQfpR7f0eR4z+CEY9ING aAMLDjB4EjZmUn2BAQDzpop/KFWJEAIhixi1ZCvD9X9KFtDEpl0OE1pwxRqgDjrNiLfKAuacOEB2x D1dK6Wulkb2cHZNwtRvw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x4zR5-0000000GVEn-2Ba3; Fri, 11 Sep 2026 11:28:51 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x4zR3-0000000GVER-3yfT; Fri, 11 Sep 2026 11:28:50 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id F049C60A6A; Fri, 11 Sep 2026 11:28:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 41AB41F00893; Fri, 11 Sep 2026 11:28:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789126128; bh=TdwEh7wUoEZtB1Tewr8qRCnFQlC7xBSTZiMIf5U/rjY=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=XcaafniETDZ2wSKshYLr6RtM3Sy36Vvk9x/PRAb7U5Vsd5tHji8Y5MUvTIcmc6tXq 43fsW07NSMowcy2CrrI6dSrbNTz4TevR+A9k/LA5KmAmkrf8lxCwnKmxc/M+aNiWS4 2OxL8+5hczzpmlY07cIZ9csCmNw9hGd934G1GxWVY6Uc9NpWxYoM+y27Ufsh8MqTkS YHWkS9RKL7qg1Hfhlo3MZPpecwBlKy6O8hFerGRfFlGex5bH9O0EzMCuoBG5z+YTez JT7aoNeua+A+sFXxwhF2OKCeUdt2ixwEaGX96dYDlPPBkDkLgL9XEGI3L09PlHhW5Z 2hH322CB8yvTA== Date: Fri, 11 Sep 2026 12:28:34 +0100 From: "Lorenzo Stoakes (ARM)" To: Florian Fainelli Cc: Linus Torvalds , Nathan Chancellor , Nicolas Schier , Nick Desaulniers , Bill Wendling , Justin Stitt , Masahiro Yamada , Alexey Gladkov , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Arnd Bergmann , Catalin Marinas , Will Deacon , Mark Rutland , Ard Biesheuvel , Ilias Apalodimas , Josh Poimboeuf , Peter Zijlstra , Miguel Ojeda , Boqun Feng , Gary Guo , =?utf-8?B?QmrDtnJu?= Roy Baron , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Daniel Almeida , Tamir Duberstein , Alexandre Courbot , Onur =?utf-8?B?w5Z6a2Fu?= , Jonathan Corbet , Randy Dunlap , linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, linux-riscv@lists.infradead.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-efi@vger.kernel.org, rust-for-linux@vger.kernel.org, linux-doc@vger.kernel.org, Jens Axboe Subject: Re: [PATCH 00/23] kbuild: significantly speed up kernel builds Message-ID: References: <20260908-build-speedup-v1-0-5dc1ac01672d@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On Wed, Sep 09, 2026 at 02:58:59PM -0700, Florian Fainelli wrote: > On 9/8/26 13:55, Lorenzo Stoakes (ARM) wrote: > > A typical kernel build consists of a frustratingly large amount of time > > spent stuck in single-threaded bottlenecks. > > > > It turns out that there's a lot we can do about this and doing so > > significantly impacts kernel build times. > > > > This series makes allmodconfig builds up to 36% faster, incremental builds > > up to ~70% faster, and noop builds up to ~90% faster. > > > > Builds are faster across the board on every device I tested. > > > > Machines used for perf testing: > > > > * Threadripper - x86, AMD Threadripper 9980X, 64 cores, 128 threads > > * EPYC - x86, 2 socket EPYC 9754, 256 cores, 512 threads > > * M2 - arm64, 2022 M2 macbook pro, 8 cores, 8 threads > > (4 perf, 4 efficiency) > > My AMD EPYC 9454P server shows an improvement in the order of 13% using the > arm64's defconfig and make -j97. Thanks for doing this! Nice thanks! Good to confirm others are seeing the benefits :) > -- > Florian > -- Cheers, Lorenzo _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv