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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C8BBFC433F5 for ; Mon, 8 Nov 2021 15:56:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A441D61178 for ; Mon, 8 Nov 2021 15:56:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239308AbhKHP7S (ORCPT ); Mon, 8 Nov 2021 10:59:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32840 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239202AbhKHP7Q (ORCPT ); Mon, 8 Nov 2021 10:59:16 -0500 Received: from mail-pg1-x533.google.com (mail-pg1-x533.google.com [IPv6:2607:f8b0:4864:20::533]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 887D2C061570 for ; Mon, 8 Nov 2021 07:56:32 -0800 (PST) Received: by mail-pg1-x533.google.com with SMTP id j9so15546344pgh.1 for ; Mon, 08 Nov 2021 07:56:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=message-id:date:mime-version:user-agent:subject:content-language:to :cc:references:from:in-reply-to:content-transfer-encoding; bh=/g/s0/C4qftb89FVN3aA4E91PSRYYBT+PXfpn2fQN+w=; b=eCWiTVoBM/szy6RP+MkvMlqeJM9gJeCgBFtgJvPxLIE8f7UMl8VeUBksizzQJNs6Sz 5shemjk1W30+oQN6iPdmKvpxvPIs8zX1GHfJBmRt7A70FuqhPjmZEqz/JPVfyy6M8Hg6 ulpJfC7A3eFgnJ0bUxVWvtyZ7j9xp2wYSLUV3vmTPl88jrjn0w+iXEkbhApTbup/TCvL MuFohdlaJ1avH1yxfdHwaxzLnpe+PMMMeouITmL7ZXH4g6LO2mHABP1RGiAM611b33vb TQpqUIndobdeIdcOP1HikEX5Q21Q7VhQqif4fZ8HKGXkoCO9IjKZAtp785zkMMNJzKvy xIqQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=/g/s0/C4qftb89FVN3aA4E91PSRYYBT+PXfpn2fQN+w=; b=QrHvgOUZTzab3s5QYK+JkjuJ/DZlRGHPqSy/ZDpjXh1nWwR3nDK0DrSToP2/pFQoAb vHXeCflPiecsFLG2CE4uNwA5pr+JeXiCBmNGNvv4WyU+Y0mCub2JInA3vMwlAV1LsTBF tjaLnSJ9E7tJURvLJg6IVApONGZwoTQGEYbphpQGHo7iV5pfqa0t240FhomtsFKvA7DL GlQ6u35zaVBZ53veoz1eGzbAy55Bqn3UiWFI8A5by9Sxv+OILjZP3kvZkD2RDOZDg5jC U9O0YZd55LRsAeaF8FMwvRr1HiVfATJCurOoZC2XvOgE8FTb4XEW2AidIvBcHyzRr3jV guJw== X-Gm-Message-State: AOAM531f5x5OWHtlGgZ0Cfte5u15L9epYes3MOuPKDsM+P2Ctm86DjTX t27Tf+r5X2lTp4/b8UuUO6I= X-Google-Smtp-Source: ABdhPJy5GKUzXM6T0G2GdpyIIYtgEZ43r1gjyxVz0tT83uWGll+mgL0nrFYsXwqw3r6EPQfQPdQtDg== X-Received: by 2002:aa7:8d44:0:b0:47b:ee6c:5ca4 with SMTP id s4-20020aa78d44000000b0047bee6c5ca4mr428951pfe.49.1636386992134; Mon, 08 Nov 2021 07:56:32 -0800 (PST) Received: from ?IPV6:2601:645:8400:1:99e5:9255:239c:47f4? ([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