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 051CFC4332F for ; Thu, 2 Nov 2023 20:20:46 +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:Cc:To:In-Reply-To:References:Date: Message-Id:From:Subject:MIME-Version:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=LoOZwScOI1c/eNsC3jurjXdUViPcKVuGB5HwGH00K/I=; b=UgC6uOYVb9+DEt XfOjp9MpBWnwJmPClG1G6lLNVCeNq/f66QZ8v6leamJZshHIXRbLlbEmTcFARwFsIyyQ4+cDzAWeG DRK6wsUWHdE7by3gcfQXzuXlDIUPPGwrkP/QNCiah2PvUb2wJZvqYxI4M7pjGbxg0ocb6lAJNbcn+ x4ohzo4DlNU4wwgibMlOkkXiJV2/oSmQKLdMNEKj4AUImOOuC5u+xr6Sxg+d5Pm2iyDCR9WbUvdn0 6NCvFj8s08m1WJFHdLh6M5oqyQhNDEwlClXHadHGl2zLzL5RE54F1XuHyF1Ay0ulROXyQkyCDaWZo eUMto7fQqRWlgK90eDnA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qyeBA-00AEIu-2k; Thu, 02 Nov 2023 20:20:36 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qyeB7-00AEHG-0G for linux-riscv@lists.infradead.org; Thu, 02 Nov 2023 20:20:34 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 93157614C2; Thu, 2 Nov 2023 20:20:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id B03A8C433CD; Thu, 2 Nov 2023 20:20:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1698956430; bh=LJ143qQumSwJ+frQ2lgaKZNiAUVef0ohgDMpkllbi6c=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=sop1YtMvm+UqaKpq81oh8SDoseVahc+Y5vvsVVe+fQcl0QiuMLCeJj5mrAcC3YJ1i UsP6zD+a/6Or5rMI5kWTseDv7lmP91npEuoFZoHyWxNgbujJ7F7oDMJWrSkaUj599d 7C9W1uANcMrrRcsdAkHAjXdDOBPSu/hHIr6TSfkMOK0zPq1KtuAHQmeq2/ZpsIxU6g +EGzHUpSoDhiAyC3UN7NIMQkHqFmMHUPejrCUVUXOUjvBVQC7C/3Yyfr2+iyIPUft5 dRM24b8yDOuzYR7ayMWhIfLUVJnQl2qFzuDZhI55TTEXNs9WMoM/ygoFKNTklLWZuP 4xhJ1695PEq9g== 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 8B38DE00089; Thu, 2 Nov 2023 20:20:30 +0000 (UTC) MIME-Version: 1.0 Subject: Re: [PATCH v2] RISC-V: Probe misaligned access speed in parallel From: patchwork-bot+linux-riscv@kernel.org Message-Id: <169895643056.22248.6956745778026886386.git-patchwork-notify@kernel.org> Date: Thu, 02 Nov 2023 20:20:30 +0000 References: <20230920193801.3035093-1-evan@rivosinc.com> In-Reply-To: <20230920193801.3035093-1-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, maz@kernel.org, linux-kernel@vger.kernel.org, conor.dooley@microchip.com, David.Laight@aculab.com, palmer@dabbelt.com, jszhang@kernel.org, paul.walmsley@sifive.com, greentime.hu@sifive.com, ajones@ventanamicro.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231102_132033_180510_BC34773C X-CRM114-Status: UNSURE ( 9.01 ) X-CRM114-Notice: Please train this message. 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 Hello: This patch was applied to riscv/linux.git (for-next) by Palmer Dabbelt : On Wed, 20 Sep 2023 12:38:01 -0700 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. > > [...] Here is the summary with links: - [v2] RISC-V: Probe misaligned access speed in parallel https://git.kernel.org/riscv/c/0c37376609da You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv