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[74.87.59.234]) by smtp.gmail.com with ESMTPSA id x23-20020aa79197000000b005a84e660713sm380596pfa.195.2023.02.15.22.15.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 15 Feb 2023 22:15:40 -0800 (PST) Message-ID: Date: Wed, 15 Feb 2023 20:15:37 -1000 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.7.1 Subject: Re: [PATCH 00/27] tcg: Simplify temporary usage Content-Language: en-US To: Emilio Cota Cc: qemu-devel@nongnu.org, peter.maydell@linaro.org References: <20230130205935.1157347-1-richard.henderson@linaro.org> From: Richard Henderson In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2607:f8b0:4864:20::531; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x531.google.com X-Spam_score_int: -23 X-Spam_score: -2.4 X-Spam_bar: -- X-Spam_report: (-2.4 / 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, NICE_REPLY_A=-0.257, 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 On 2/10/23 02:35, Emilio Cota wrote: > I ran yesterday linux-user SPEC06 benchmarks from your tcg-life branch. > I do see perf regressions for two workloads (sjeng and xalancbmk). > With perf(1) I see liveness_pass* are at 0.00%, so I wonder: is it > possible that the emitted code isn't quite the same? Everything that I checked by hand was the same, but it's possible. It's a tedious process. You'd definitely want to turn off ASR. My current branch has __attribute__((noreturn)) added to all of the liveness passes, so that they don't get folded into tcg_gen_code. But I still would expect 0%. r~