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([2601:645:8400:1:99e5:9255:239c:47f4]) by smtp.gmail.com with ESMTPSA id g7sm3333985pfm.127.2021.11.08.07.56.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 08 Nov 2021 07:56:31 -0800 (PST) Message-ID: <5724239b-2819-ba97-2350-675abedc241c@gmail.com> Date: Mon, 8 Nov 2021 07:56:30 -0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.2.0 Subject: Re: Performance regression: thread wakeup time (latency) increased up to 3x Content-Language: en-US To: Frederic Weisbecker Cc: Peter Zijlstra , Steven Rostedt , linux-kernel@vger.kernel.org, Ingo Molnar , Thomas Gleixner , Yunfeng Ye , "Rafael J. Wysocki" References: <035c23b4-118e-6a35-36d9-1b11e3d679f8@gmail.com> <5fe0ffa5-f2db-ca79-5a10-305310066ff9@gmail.com> <20211015100401.45833169@gandalf.local.home> <8691a8ec-410d-afe8-f468-eefe698c6751@gmail.com> <20211107155616.GA269390@lothringen> From: Norbert In-Reply-To: <20211107155616.GA269390@lothringen> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/7/21 07:56, Frederic Weisbecker wrote: > > Is it possible for you to share this benchmark so that I can try to reproduce? > > Thanks! > Emails were sent. It's currently 1000+ lines of largely experimental code, so a bit too much to post here on the list... (and in the middle of adding more). --Norbert