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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 82147C4332F for ; Wed, 8 Nov 2023 15:10:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233059AbjKHPKe (ORCPT ); Wed, 8 Nov 2023 10:10:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34766 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232328AbjKHPK0 (ORCPT ); Wed, 8 Nov 2023 10:10:26 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8067D1FC3 for ; Wed, 8 Nov 2023 07:10:24 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPS id 16A09C433CD; Wed, 8 Nov 2023 15:10:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1699456224; bh=+q4CMZEtGo5T8fEL2Av92WTVOokwQQBXyhymHf9umrE=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=b41UNZmy2S7levto+O8FCd4Vh4U9Si2Z+0j8DASbN+bcz8POhFLkSfzokKmapNm9T F6WR2Ul5h9V/Z6gWuSjycEMgV4yTGBwMJPcUVkhPBdKveZ6qUcgcAIqS/K8oE74gJT vj0xIU/AypRqUyL8A7C02fJoJ0Lq/sWgwYrlCW42qb5s1zTRamqmkrPeXAxOXOU0jI paSVhtpEvmhLA5Wlp0nhizR5i5X7ZdCa8GtVsrncz7D/nTcyLgvUjjc0eI4RrXYmk5 9XsjxRt+RR9K+5SCzt5T1sRj6numRQKNmdOJAa4vFLNX893xBIUx4PgV9ZocL86usm Fow7lHkx2Qvew== Received: from aws-us-west-2-korg-oddjob-1.ci.codeaurora.org (localhost.localdomain [127.0.0.1]) by aws-us-west-2-korg-oddjob-1.ci.codeaurora.org (Postfix) with ESMTP id E8903E00088; Wed, 8 Nov 2023 15:10:23 +0000 (UTC) Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH v3] RISC-V: Probe misaligned access speed in parallel From: patchwork-bot+linux-riscv@kernel.org Message-Id: <169945622394.21527.3124390235718223224.git-patchwork-notify@kernel.org> Date: Wed, 08 Nov 2023 15:10:23 +0000 References: <20231106225855.3121724-1-evan@rivosinc.com> In-Reply-To: <20231106225855.3121724-1-evan@rivosinc.com> To: Evan Green Cc: linux-riscv@lists.infradead.org, palmer@rivosinc.com, apatel@ventanamicro.com, aou@eecs.berkeley.edu, heiko@sntech.de, leyfoon.tan@starfivetech.com, maz@kernel.org, bigeasy@linutronix.de, paul.walmsley@sifive.com, linux-kernel@vger.kernel.org, conor.dooley@microchip.com, David.Laight@aculab.com, palmer@dabbelt.com, jszhang@kernel.org, greentime.hu@sifive.com, cleger@rivosinc.com, ajones@ventanamicro.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello: This patch was applied to riscv/linux.git (for-next) by Palmer Dabbelt : On Mon, 6 Nov 2023 14:58:55 -0800 you wrote: > Probing for misaligned access speed takes about 0.06 seconds. On a > system with 64 cores, doing this in smp_callin() means it's done > serially, extending boot time by 3.8 seconds. That's a lot of boot time. > > Instead of measuring each CPU serially, let's do the measurements on > all CPUs in parallel. If we disable preemption on all CPUs, the > jiffies stop ticking, so we can do this in stages of 1) everybody > except core 0, then 2) core 0. The allocations are all done outside of > on_each_cpu() to avoid calling alloc_pages() with interrupts disabled. > > [...] Here is the summary with links: - [v3] RISC-V: Probe misaligned access speed in parallel https://git.kernel.org/riscv/c/55e0bf49a0d0 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html