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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id ECCE5CDB482 for ; Fri, 13 Oct 2023 17:41:14 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qrM92-0006kA-I5; Fri, 13 Oct 2023 13:40:16 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qrM91-0006jx-4A for qemu-devel@nongnu.org; Fri, 13 Oct 2023 13:40:15 -0400 Received: from mail-pl1-x632.google.com ([2607:f8b0:4864:20::632]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qrM8z-0002ws-0h for qemu-devel@nongnu.org; Fri, 13 Oct 2023 13:40:14 -0400 Received: by mail-pl1-x632.google.com with SMTP id d9443c01a7336-1c9b1e3a809so18097205ad.2 for ; Fri, 13 Oct 2023 10:40:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1697218810; x=1697823610; darn=nongnu.org; h=content-transfer-encoding:in-reply-to:references:to:from :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=x0hwMzEW4NXYgGGazupgEUwRiCIbxvtmUbJERhzngug=; b=F+cCtQdi0U04SH/C3Iaj0rWNGOCahJXxvjCgaIW6W3958UnR6dIo3H7wqReOaeFYFo 0UofLgJ9P0isNOS8MoSOC3i1bEgVeihJ75Tq9JAlgFO8jI7JPZKSxHtnuxwUx6sLy0/A P1YrkjZHkoxHY74KgKBnICaySRbfE2DGpeN/lf7m/jXQGbXyZcIUwbbKxT9nq6bKK2zc huZX6E6XUWNjLw8sBxkSRu0B5ko9imNOmd6BENClzorBftSHzZ4vErx9a0H2dmhg++qc 0jijo6cZah/Rvp8rp9ODwuKZZLX1hIhulbb2ovOcQQafrEp30/aMsVVCRYilAsZgQCRp 4jYg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1697218810; x=1697823610; h=content-transfer-encoding:in-reply-to:references:to:from :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=x0hwMzEW4NXYgGGazupgEUwRiCIbxvtmUbJERhzngug=; b=SoroBofzuquAYlPAy6mtBri9/w2PJW7Fpsn7N/WZ9xMRudoHSOcMIAMHekSRwT91pu VAmbG9IuIDJExNwoClTmDe96cQfQ171g4CJEHC6+VmA8iLK+K6WG38W5f/RwTknE/1EG Y+RMBiYIK2GoPVoF4PqTBqLrWHfCXNiFbcjie/4QAwSQTIiwshyoYtM8/6smywd3dVtK sF+CN9FLxH0xhdGjmiimM9Vf7PMTRSxpYNrEGh+6r+AGbAjFbdwqHkPMtRHrv0Lx9hvy Mj4V9T14bVE0FLRyysWVKJXX2zfKrR6xB6kQc/y/LOjxowmhPmx9iz2Z92RiA/MPWAhf +ICw== X-Gm-Message-State: AOJu0YwYzgBMyj7egBDh9mBtM9gIDjR4qQP70RJmBVtl+sqPsgvVXH7H iuJHeJPrbuRGonazoPk/d4A8+BzZetiTmY4UNXo= X-Google-Smtp-Source: AGHT+IEmvxu9x4V86kJPNsMyPKUUw+3WK9aJz2hVPsbbpndVNvpIW2bHGNfinpoBQSlih6y2XrcA0w== X-Received: by 2002:a17:902:cec1:b0:1c9:e229:f5e2 with SMTP id d1-20020a170902cec100b001c9e229f5e2mr5905799plg.34.1697218810155; Fri, 13 Oct 2023 10:40:10 -0700 (PDT) Received: from [192.168.0.4] ([71.212.149.95]) by smtp.gmail.com with ESMTPSA id i12-20020a170902eb4c00b001c444106bcasm4152581pli.46.2023.10.13.10.40.09 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 13 Oct 2023 10:40:09 -0700 (PDT) Message-ID: <2346fab5-62dd-4841-927b-33ee1b4359de@linaro.org> Date: Fri, 13 Oct 2023 10:40:07 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 0/4] tcg: Optimize loads and stores to env Content-Language: en-US From: Richard Henderson To: qemu-devel@nongnu.org References: <20230831025729.1194388-1-richard.henderson@linaro.org> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::632; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x632.google.com 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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Ping 2. On 9/28/23 15:45, Richard Henderson wrote: > Ping. > > r~ > > On 8/30/23 22:57, Richard Henderson wrote: >> This is aimed at improving gvec generated code, which involves large >> numbers of loads and stores to the env slots of the guest cpu vector >> registers.  The final patch helps eliminate redundant zero-extensions >> that can appear with e.g. avx2 and sve. >> >>  From the small amount of timing that I have done, there is no change. >> But of course as we all know, x86 is very good with redundant memory. >> And frankly, I haven't found a good test case for measuring. >> What I need is an algorithm with lots of integer vector code that can >> be expanded with gvec.  Most of what I've found is either fp (out of >> line) or too simple (small translation blocks with little scope for >> optimization). >> >> That said, it appears to be simple enough, and does eliminate some >> redundant operations, even in places that I didn't expect. >> >> >> r~ >> >> >> Richard Henderson (4): >>    tcg: Don't free vector results >>    tcg/optimize: Pipe OptContext into reset_ts >>    tcg: Optimize env memory operations >>    tcg: Eliminate duplicate env store operations >> >>   tcg/optimize.c    | 226 ++++++++++++++++++++++++++++++++++++++++++++-- >>   tcg/tcg-op-gvec.c |  39 ++------ >>   2 files changed, 225 insertions(+), 40 deletions(-) >> >