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 X-Spam-Level: X-Spam-Status: No, score=-0.5 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 88B9BC433E0 for ; Sat, 4 Jul 2020 17:11:45 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 449AF20724 for ; Sat, 4 Jul 2020 17:11:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="CybKCi2+" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 449AF20724 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:36382 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jrlhY-0004Ox-F3 for qemu-devel@archiver.kernel.org; Sat, 04 Jul 2020 13:11:44 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57246) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jrlgn-0003Zq-BU for qemu-devel@nongnu.org; Sat, 04 Jul 2020 13:10:57 -0400 Received: from mail-lj1-x233.google.com ([2a00:1450:4864:20::233]:33669) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jrlgl-0003Xt-Bg for qemu-devel@nongnu.org; Sat, 04 Jul 2020 13:10:57 -0400 Received: by mail-lj1-x233.google.com with SMTP id e8so6195732ljb.0 for ; Sat, 04 Jul 2020 10:10:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=wbWTFvoG9vqSttdZDRJ5rqkwxbhbCiQaHwG6Z/uJNsE=; b=CybKCi2+WNRZLVv5+tLFf/vILRiB3bdjDN3Q7Ms5bse1qtT+MGwTjXy+6CIIYbfcTs MQh20YXrJ3pdHeAQHmp7Bxfbnjyf1kpXaq9NMTgH0IDivv16nL5KIg62vs0Hn9xVvI7Q rtqupYOah5f3V+lVHfN7nUZy73i7czaEc9wM3DWgJX2ic9uOHhMFPV/otZ6tF+wtlwED g8VF3BztEJY8z3LZX7+13ITYEnG3DQgsCd+3xAEjiQ/ZOyWVzbnF9pwGeyuPnVNlqRVy AoEoY3oON9KLJo1z2d/SXNotm5Y+HtP0L4iVOGLBNi50nKdKU5AQvfdrB67YkYCTgWpR xoIw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=wbWTFvoG9vqSttdZDRJ5rqkwxbhbCiQaHwG6Z/uJNsE=; b=uabProOcn/6DM3ngG0AtTTxR1Pmn0jeNqcCzHOZL5kaOKVP7bOoR1yVub6wuF24Qi6 K93s4O/sxQ7jt5dp0ptVA8sI4FkQ877VgICjb89cjwhorBXIHKhvzlyW1nsE0T5Mg+/t rXW5efjJtZ0fP+sRXv7/Ca9stwFHM+iVu6lwWoYZkwr//WJVy3OF1+eljHrEWhTN1Lfe hDEXQn09Sdvp5w8n4MFYTFFN6xuHX1QOnYgF9G38Afh/aPlzaNnINSKlXYjGI6jOMChn RHB+yBIBKWhPmFaDuJJVFBalv8CY1KcOqXTwrzreRuVtwbDBpbmvleoQaFREfnaVRqJJ hNmg== X-Gm-Message-State: AOAM533ipkSCoh63tlXdirZhQfxK+KwRbDIt5t8e+Psge+2tVGLZWSlO UpGQYw9rkC+fWzlTceRhvDn7diI2kNfBM+A69mw= X-Google-Smtp-Source: ABdhPJyK3O+qfkijvBOx/JE7+nZYQb1PTjkpX5MwgFVvBdjBt/GdcJjmfeoaAxaTYhDmeGeKXTj9gatJdv3TQMgvoqY= X-Received: by 2002:a05:651c:1044:: with SMTP id x4mr21698424ljm.409.1593882653232; Sat, 04 Jul 2020 10:10:53 -0700 (PDT) MIME-Version: 1.0 References: <878sg5svu5.fsf@linaro.org> <87sgebqm1i.fsf@linaro.org> <87fta7fz3n.fsf@linaro.org> In-Reply-To: <87fta7fz3n.fsf@linaro.org> From: Ahmed Karaman Date: Sat, 4 Jul 2020 19:10:18 +0200 Message-ID: Subject: Re: [REPORT] [GSoC - TCG Continuous Benchmarking] [#2] Dissecting QEMU Into Three Main Parts To: =?UTF-8?B?QWxleCBCZW5uw6ll?= Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=2a00:1450:4864:20::233; envelope-from=ahmedkhaledkaraman@gmail.com; helo=mail-lj1-x233.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?UTF-8?B?THVrw6HFoSBEb2t0b3I=?= , Aleksandar Markovic , QEMU Developers , Richard Henderson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Sat, Jul 4, 2020 at 10:45 AM Alex Benn=C3=A9e w= rote: > > > Aleksandar Markovic writes: > > > On Wednesday, July 1, 2020, Alex Benn=C3=A9e w= rote: > > > >> > >> Ahmed Karaman writes: > >> > >> > On Mon, Jun 29, 2020 at 6:03 PM Alex Benn=C3=A9e > >> wrote: > >> >> > >> >> Assuming your test case is constant execution (i.e. runs the same e= ach > >> >> time) you could run in through a plugins build to extract the numbe= r of > >> >> guest instructions, e.g.: > >> >> > >> >> ./aarch64-linux-user/qemu-aarch64 -plugin tests/plugin/libinsn.so= -d > >> plugin ./tests/tcg/aarch64-linux-user/sha1 > >> >> SHA1=3D15dd99a1991e0b3826fede3deffc1feba42278e6 > >> >> insns: 158603512 > >> >> > >> >> -- > >> >> Alex Benn=C3=A9e > >> > > >> > Hi Mr. Alex, > >> > I've created a plugins build as you've said using "--enable-plugins" > >> option. > >> > I've searched for "libinsn.so" plugin that you've mentioned in your > >> > command but it isn't in that path. > >> > >> make plugins > >> > >> and you should find them in tests/plugins/ > >> > >> > > Hi, both Alex and Ahmed, > > > > Ahmed showed me tonight the first results with number of guest > > instructions. It was almost eye-opening to me. The thing is, by now, I = had > > only vague picture that, on average, "many" host instructions are gener= ated > > per one guest instruction. Now, I could see exact ratio for each target= , > > for a particular example. > > > > A question for Alex: > > > > - What would be the application of this new info? (Except that one has = nice > > feeling, like I do, of knowing the exact ratio host/guest instruction f= or a > > particular scenario.) > > Well I think the total number of guest instructions is important because > some architectures are more efficient than others and this will an > impact on the total executed instructions. > > > I just have a feeling there is more significance of this new data that = I > > currently see. Could it be that it can be used in analysis of performan= ce? > > Or measuring quality of emulation (TCG operation)? But how exactly? Wha= t > > conclusion could potentially be derived from knowing number of guest > > instructions? > > Knowing the ratio (especially as it changes between workloads) means you > can better pin point where the inefficiencies lie. You don't want to > spend your time chasing down an inefficiency that is down to the guest > compiler ;-) > > > > > Sorry for a "stupid" question. > > > > Aleksandar > > > > > > > > > >> > > >> > Are there any other options that I should configure my build with? > >> > Thanks in advance. > >> > > >> > Regards, > >> > Ahmed Karaman > >> > >> > >> -- > >> Alex Benn=C3=A9e > >> > > > -- > Alex Benn=C3=A9e Thanks Mr. Alex for your help! Regards, Ahmed Karaman