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[23.128.96.18]) by mx.google.com with ESMTP id t19si11601302ejd.179.2021.03.15.10.16.51; Mon, 15 Mar 2021 10:17:14 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@alien8.de header.s=dkim header.b=VNffTpmt; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=alien8.de Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235659AbhCORPr (ORCPT + 99 others); Mon, 15 Mar 2021 13:15:47 -0400 Received: from mail.skyhub.de ([5.9.137.197]:37624 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233348AbhCORP0 (ORCPT ); Mon, 15 Mar 2021 13:15:26 -0400 Received: from zn.tnic (p200300ec2f0786001d9615583ace417a.dip0.t-ipconnect.de [IPv6:2003:ec:2f07:8600:1d96:1558:3ace:417a]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id C24401EC009F; Mon, 15 Mar 2021 18:15:24 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1615828524; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=r5BUsq1SAuUJ7ZD0GYrjtLkJBkXKoZyJkdDAfizs+Ms=; b=VNffTpmtxNFojpDVmtHvkx8BS8d42JKHiQ2TS1CGqu/nynpuhR2IKXpThOM48pnqCiQ3+1 Ej5omPJR1OGPiTSJDDzsJ8KYHtIf77BnyAz+kA2ntpW9Hsaoe6yFkCpWYKmi0+P8HOjwHn ZK+DdPQKFH5fRCsuqJcdgDL7GVCIvos= Date: Mon, 15 Mar 2021 18:15:16 +0100 From: Borislav Petkov To: Sedat Dilek Cc: Peter Zijlstra , x86@kernel.org, rostedt@goodmis.org, hpa@zytor.com, torvalds@linuxfoundation.org, linux-kernel@vger.kernel.org, linux-toolchains@vger.kernel.org, jpoimboe@redhat.com, alexei.starovoitov@gmail.com, mhiramat@kernel.org Subject: Re: [PATCH 0/2] x86: Remove ideal_nops[] Message-ID: <20210315171516.GG20497@zn.tnic> References: <20210313084923.GA16144@zn.tnic> <20210313121541.GC16144@zn.tnic> <20210313124919.GD16144@zn.tnic> <20210313132927.GF16144@zn.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Mar 15, 2021 at 06:04:41PM +0100, Sedat Dilek wrote: > Here some fresh numbers: Lemme paste my previous reply which still holds true here: "There's a reason I have -s for silent in the build - printing output during the build creates a *lot* of variance. And you have excessive printing with V=1 and KBUILD_VERBOSE=1. Also, you need to repeat those workloads a couple of times - one is not enough. That's why I have --repeat 5 in there. Also, you need --pre=/root/bin/pre-build-kernel.sh where that script is: --- #!/bin/bash echo $0 make -s clean echo 3 > /proc/sys/vm/drop_caches --- so that you can avoid pagecache influence." -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette